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TM 1-70-23-1 TECHNICAL MANUAL AIRCRAFT MAINTENANCE PROCEDURES MANUAL FOR SIKORSKY MODEL S-70 HELICOPTER

CHAPTER 1 - AIRCRAFT GENERAL AND ROUTINE MAINTENANCE

T-REVISIONS 1 - 68 HAVE BEEN INCORPORATED WHERE APPLICABLE. CHANGES TO THIS MANUAL ARE INDICATED BY A CHANGE NUMBER ON THE BOTTOM OF THE PAGE. INSERT PAGES ISSUED WITH THIS CHANGE INTO THE MANUAL. DISCARD AND DESTROY ALL COPIES OF REPLACED PAGES.

WARNING: THIS DOCUMENT, OR AN EMBODIMENT OF IT IN ANY MEDIA, DISCLOSES INFORMATION WHICH IS PROPRIETARY, IS THE PROPERTY OF SIKORSKY AIRCRAFT CORPORATION AND/OR ITS SUBSIDIARIES, IS AN UNPUBLISHED WORK PROTECTED UNDER APPLICABLE COPYRIGHT LAWS, AND IS DELIVERED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED, DISCLOSED, REPRODUCED, IN WHOLE OR IN PART (INCLUDING REPRODUCTION AS A DERIVATIVE WORK), OR USED FOR MANUFACTURE FOR ANYONE OTHER THAN SIKORSKY AIRCRAFT CORPORATION AND/OR ITS SUBSIDIARIES WITHOUT ITS WRITTEN CONSENT, AND THAT NO RIGHT IS GRANTED TO DISCLOSE OR SO USE ANY INFORMATION CONTAINED HEREIN. ALL RIGHTS RESERVED. ANY ACT IN VIOLATION OF APPLICABLE LAW MAY RESULT IN CIVIL AND CRIMINAL PENALTIES.

© SIKORSKY AIRCRAFT CORPORATION - 1 DECEMBER 2005

CHANGE 10 - 1 DECEMBER 2015

SIKORSKY AIRCRAFT CORPORATION 1 DECEMBER 2005 WARNING – This document contains technical data subject to the ITAR; and the EAR. Authorization is required prior to providing this technical data to any company, entity, person, or destination. ITAR/USML Category: VIII(i), EAR Export Classification: ECCN 9E610.a

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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Insert latest change pages; dispose of superseded pages in accordance with applicable policies. NOTE: On a change page, the portion of the text affected by the change is indicated by a vertical line (change bar) in the outer margin of the page and a change number at the bottom of the page. A new Chapter, Section, or Paragraph is indicated with only a change number at the bottom of the page. A change to an illustration is indicated by a change bar next to the illustration’s title. Dates of issue for original and change pages are: Original Change Change Change Change Change Change Change Change Change Change

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WARNING Personnel performing operations, procedures, and practices which are included or implied in this technical manual shall observe the following warnings. To disregard these warnings and precautionary information can cause serious injury, death, or an aborted mission.

WARNING FSCAP This technical manual contains procedures for identifying critical characteristics of FSCAP. Critical characteristics may be identified as dimensions, tolerances, finishes, materials, assembly, or inspection procedures. Some processes may require qualified sources. FSCAP indicating a maximum allowable limit shall not be continued in use when limits have been exceeded. These parts must be replaced.

WARNING AC POWER Before applying ac power to the helicopter, make sure that the area around the stabilator is clear of personnel and equipment. Should the stabilator be in any position other than trailing edge fully down, it may reposition automatically to fully down when ac power is applied.

WARNING AVIATION FUEL Pending the release of more detailed guidance on acceptable occupational exposure limits, personnel involved in the handling of aviation turbine fuels are to adhere to the following general practices when exposure to fuel or fuel vapours is likely: a.

Avoid skin contact with fuels and observe good personal hygiene, in particular prior to eating, drinking, or smoking.

b.

Be familiar with basic safety and handling requirements for aviation fuels and other flammable/explosive materials, including: (1)

avoid generation of static electricity,

(2)

avoid ignition sources,

(3)

earth all lines and equipment,

Change 5 This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

a

TM 1-70-23

c.

(4)

use spark free tools where necessary, and

(5)

avoid contact with incompatible materials.

If contamination occurs, clothing is to be changed as soon as possible. Clothing wet with fuel should be soaked with water prior to removal to prevent the possibility of ignition by electro-static discharge. Contaminated clothing should be laundered separatley prior to reuse.

WARNING BERYLLIUM COPPER AND BERYLLIUM OXIDE

Beryllium copper and beryllium oxide can be serious health hazards. Dust created by breakage of beryllium copper/oxide is a serious toxic hazard, and if involved in fire, gives off large amounts of toxic fumes. Inhaled beryllium materials affect lungs, causing chronic beryllium disease, which is incurable, progressive, and fatal. Beryllium materials absorbed into body tissues, mouth, skin, or wound, cause the formation of tumors. Keep beryllium copper/oxide out of open wounds. Deliberate abrasion of beryllium materials must not be attempted in any circumstance. Use PPE specified while handling parts containing beryllium copper or beryllium oxide. Clean up visible dust piles and wash hands and arms after maintenance.

WARNING CARBON MONOXIDE During cold weather operations when preheating is necessary, all personnel shall become acquainted with the various types of heaters and where they are to be used. Be careful of accumulations of carbon monoxide and damage to heat-sensitive equipment.

WARNING CHEMICAL FILM MATERIALS Chemical film materials are strongly oxidizing and are a fire hazard when in contact with organic materials such as paint thinners. Do not store or mix surface treatment materials in containers previously containing flammable products. Rags contaminated with chemical film materials should be thoroughly rinsed and disposed of as soon as practicable.

b

Change 5 This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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WARNING CONSUMABLE MATERIALS Observe all cautions and warnings on the containers when using consumables. When applicable wear necessary protective gear during handling and use. If a consumable is flammable or explosive, MAKE SURE consumable and its vapors are kept away from heat, spark, and flame. MAKE SURE helicopter is properly grounded and firefighting equipment is readily available for use.

WARNING

HIGH VOLTAGE There are dangerous voltages in the helicopter. Use extreme care when working with equipment having these voltages.

WARNING

HYDRAULIC SYSTEMS There are dangerous high hydraulic system pressures in the helicopter. Use extreme care when working on systems having this pressure.

WARNING

USE OF FIRE EXTINGUISHER When fire extinguishers are used in a confined area, ventilate immediately. Serious injury or death could result if the area is not ventilated or the user does not use a self-contained breathing device.

WARNING

MAIN ROTOR PYLON SLIDING COVER When opening and closing main pylon sliding cover, keep hands away from sharp edges near track, mating end, and especially ventilation blower inlet hole. Change 5 This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

c

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WARNING NOISE Sound pressure levels in and around this helicopter during some operating conditions exceed the surgeon generals hearing conservation criteria, as defined in DA PAM 40-501. Hearing protection devices are required to be worn by all personnel in and around the helicopter during operation of main engine and/or auxiliary power unit (APU). CAUTION

Do not operate the rotor system while the main rotor pylon sliding cover is in the open position. Main rotor blades could contact the main rotor pylon sliding cover. If rotor system operation is required when the main rotor pylon sliding cover is open, remove main rotor pylon sliding cover. CAUTION

Damage to main rotor servo piston rods seal will occur if piston rods come in contact with contaminates during maintenance procedures. Contaminated main rotor servo piston rods will cause seal damage during use causing excessive leakage past seals. Cover up main rotor servos prior to maintenance work to keep area clean. CAUTION

Damage can occur if limits noted on engine cowlings are exceeded. Maximum weight, engine cowlings can support including equipment, is 400 pounds. No more than two people are permitted on engine cowling at any one time, with no one person weighing over 250 pounds. Do not apply load to vertical surface.

d

Change 5 This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 NOTE The following two lists contain Alert Service Bulletins (ASB) and Customer Service Notices (CSN) that indicate if and when an ASB or CSN is incorporated into the manuals. If data contained in an ASB or CSN has been incorporated into the manuals, the word YES will appear in the INCORPORATED column. If ASB or CSN does not effect the manual (for example a one-time inspection), the words NO EFFECT will appear. If data in an ASB or CSN has not been incorporated into the manual, no entry will appear in the INCORPORATED column. This ASB/CSN list applies to all operators of Sikorsky S70 Foreign Military Sales and Commercial helicopters. This list is generic and is not specific to any one helicopter model. This list contains ASB/CSN’s that apply to the entire series of manuals used to operate, troubleshoot, and maintain Sikorsky S70 Foreign Military Sales and Commercial helicopters. ALERT SERVICE BULLETINS Number

Date

Alert Service Bulletins

Incorporated

70-02-1

08-22-85

Airframe System - Inspection of Stabilator Assembly

YES

70-02-2

06-18-85

Airframe System - Tail Cone Bulkhead Attachment Bolt Assembly Torque (Station 485) - Inspection of

YES

70-02-3D

03-25-92

Airframe System - Upper Fuselage Structural Assembly Tiedown Rings/Maintenance Crane Eyebolts - Discontinue Use of

YES

70-02-4

06-03-86

Airframe System - Main Rotor Pylon Forward Sliding Fairing Track Installation - Rework of

NO EFFECT

70-02-5

07-03-86

Airframe System - Stabilator Position Sensor Installation - Attaching Hardware - Inspection of

NO EFFECT

70-02-6A

10-30-87

Airframe System - Main Rotor Pylon Forward Sliding Fairing Assembly Rollers - Inspection of

NO EFFECT

70-02-7

12-03-87

Airframe System - Passenger Door Installation - Support Pins - Replacement of

NO EFFECT

70-02-8A

10-30-87

Airframe System - Engine Cowling Installation - Release Handle Assemblies - Inspection of

YES

70-02-9A

09-09-87

Airframe System - Passenger Doors - Electrical Door Locking Actuators - Temporary Removal of

NO EFFECT

70-02-10A

05-09-88

Airframe System - Pin Receivers for Main Rotor Pylon Sliding Cover/Fairing - Inspection of

YES

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ASB/CSN-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-02-11A

09-15-88

Airframe System - VIP Model Station 308 - 379 Upper Longeron Installation - Inspection/Modification of

NO EFFECT

70-02-12

10-03-88

Airframe System - Blade Fold Stowage Support Pin Installations - Inspection for Proper Torque

NO EFFECT

70-02-13

11-23-88

Airframe System - Pilot and Copilot Seats - Column Guide Rail Clevis Screws - Inspection and Installation of Safetywire for Security

NO EFFECT

70-02-14A

08-11-89

Airframe System - Cargo Door Latching Mechanism Installation - Inspection of

NO EFFECT

70-02-15

09-06-89

Airframe System - Wire Strike Protection System (WSPS) Pitot Cutter Installation - Inspection of Attachment Screws for Proper Length

YES

70-02-16

03-14-90

Airframe System - Upper Longeron Ribs Installation - Inspection for Cracks; Radius Blocks - Installation of

NO EFFECT

70-02-17A

11-27-90

Airframe System - Upper Fuselage Structural Assembly Tiedown/Repelling Assembly Attachment Bolts and Barrel Nuts - Reduction of Installation Torque

YES

70-02-18

03-29-93

Airframe System - Main Rotor Pylon Forward Sliding Fairing Cover Assembly - Inspection and Repair of

NO EFFECT

70-02-19A

03-29-93

Airframe System - Cockpit Doors - Jettison Operation Check

YES

70-02-20

03-22-93

Airframe System - Mission Seat Installation - Passenger/ Instructor Seat Beam Assembly - One-Time Inspection of

NO EFFECT

70-02-21

07-07-97

Airframe System - Center Stabilator Assembly - Removal of Inboard Bolt Retainer Brackets; Inspection of Center Stabilator Forward Spar Fitting

NO EFFECT

70-02-22

06-29-00

Airframe System - Extended Stores Pylon - One-Time Inspection of the Airframe and Recurring Inspection Requirements

NO EFFECT

70-02-23

N/A

70-02-24B

12-20-01

ASB/CSN-2

Not Issued Airframe System - Crew/Passenger Seats - Seat Restraints Recall of

N/A NO EFFECT

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-02-25

11-08-01

Airframe System - Cargo Seat - Removal of Crew Chief/ Passenger on a 15 Seat Configuration

NO EFFECT

70-02-26

09-03-02

Airframe System - Pilot/Copilot Crew Door Window Modification of Seal and Installation of Improved Strap

NO EFFECT

70-02-27

08-07-03

Airframe System - Collective Control Cover - One-Time Inspection of

NO EFFECT

70-02-28

05-25-04

Airframe System - Pilot/Copilot Crew Door Window - OneTime Inspection and Modification of Window Seal

NO EFFECT

70-02-29

07-06-04

Airframe System - Pilot/Copilot Seats - Seat Trunnion Bolts One-Time Inspection and Repair of

YES

70-02-30

04-28-05

Airframe System - Collective Control Cover - Retrofit of

NO EFFECT

70-02-31

06-15-05

Airframe and Landing Gear Systems - Stub Wing Position Light Wiring Chafe - One-Time Inspection and Installation of Anti-Chafe Protective Nylon Caterpillar Grommet

NO EFFECT

70-02-32

06-22-05

Airframe Systems - Hartwell Quick Release Hinge Assembly - One-Time Inspection of

NO EFFECT

70-02-33

09-07-05

Airframe Systems - Tail Rotor Pylon Assembly - Canted Hinge Bulkhead Fittings - Radius Pads/Block Disbonds One-Time Inspection of

YES

70-02-34

10-06-05

Airframe Systems - Engine Cowling/Work Platform - OneTime Inspection and Stencil of Revised Weight Limitations

NO EFFECT

70-02-35

02-27-07

Airframe Systems - Main Rotor Pylon Forward Fairing - OneTime Visual Inspection for the Presence of a Spring Roll Pin

NO EFFECT

70-02-36

03-25-09

Airframe Systems - Cockpit Door Windows - One-Time Inspection of Window Installations

YES

70-02-37

02-08-10

Airframe Systems - Schroth Seat Harness - One-Time Inspection of Seat Harness Adjuster Retaining Ring (C-Clip) Installation

YES

70-03-1

10-10-91

Landing Gear System - Main Landing Gear Brake Assembly One-Time Inspection of

NO EFFECT

Change 7

ASB/CSN-3

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-03-2

07-26-99

Landing Gear System - Main Landing Gear Drag Beam Jackpad Mounting Bolt Retention Nut - One-Time Reduction of Torque

YES

70-03-3

03-22-01

Landing Gear System - Main Landing Gear Drag Beam Jackpad Mounting Bolt Retention Nut - One-Time Reduction of Torque

NO EFFECT

70-03-04

07-31-03

Landing Gear System - Tail Landing Gear Drag Yoke Assembly - One-Time Non-Destructive Inspection (NDI) of

YES

70-03-05

10-01-07

Landing Gear System - Tail Landing Gear - Tail Wheel and Tire Assembly - One-Time Inspection for the Presence of a Bent Washer

YES

70-04-1A

01-02-86

Powerplant System - Inspection of Left and Right Engine Output Shaft Assemblies/Installations

YES

70-04-2B

02-28-86

Power Plant System - Exhaust Deswirl Duct, Inspection of V-Band Clamp

YES

70-04-3A

08-11-89

Power Plant System - Engine Controls Quadrant Lever Assemblies - Inspection for Proper Direction of Bolt Installation Through Latch

NO EFFECT

70-04-4

11-07-89

Power Plant System - Aft Outboard Mount Fitting Assembly Spherical Bearing - Inspection of

NO EFFECT

70-04-5C

04-21-95

Power Plant System - Low Fuel Pressure Recommendations

NO EFFECT

70-04-6

01-24-92

Powerplant Systems - Engine Waterwash, Cleaning, and Rinse Procedures

NO EFFECT

70-04-7A

06-15-92

Powerplant Systems - No. 1 and No. 2 Engines - Output Shaft Flex Coupling Attachment to Input Module Flange - Replacement of Balance Studs and Rebalancing

YES

70-04-8A

04-16-93

Power Plant Systems - Gearbox-to-Hydromechanical Unit (HMU) Hose Assembly - Inspection for Subject Serial Numbers

NO EFFECT

70-04-9A

04-09-02

Powerplant System - Engine Controls Quadrant - Modification of Power Control Lever Assembly - Starter-Abort Switch Wiring

YES

ASB/CSN-4

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-04-10

04-07-03

Powerplant System - Engine Controls Quadrant - Inspection of Fire Extinguishing System Harness

YES

70-04-11

01-31-07

Power Plant System - One Time Torque Check of Engine Axis-A Oil Jet Locknuts and White Harness Rerouting

YES

70-04-12

04-24-07

Power Plant System - Engine Controls Quadrant - Power Control Lever - One-Time Inspection of

YES

70-04-13

12-17-07

Power Plant System - Engine Controls Quadrant - Modification of Engine Power Control Lever Assembly

YES

70-04-14

08-27-09

Power Plant System - Engine Systems - Deswirl Duct - OneTime Inspection of

NO EFFECT

70-05-1B

07-18-85

Rotor System - Main Rotor Head - Modification of Spindle Assembly; Pitch Horn and Droop Stop - Inspection of

NO EFFECT

70-05-2A

04-10-86

Rotor System - Tail Rotor Blade Fairing Assembly - Inspection of

NO EFFECT

70-05-3

07-03-86

Rotor System - Main Rotor Blade Anti-Ice System - Tube Assembly Attachment Nuts Torque - Inspection of

YES

70-05-4A

09-25-87

Rotor System - Swashplate Assembly - Stationary/Rotating Indexing Paint Strips - Inspection of

YES

70-05-5A

03-04-88

Rotor System - Tail Rotor Hub Shim - Inspection of

70-05-6A

09-14-93

Rotor System - Main Rotor Head - Upper Pitch Control Rods Attach Bolts - Rotational Movement - Inspection for

YES

70-05-7

09-09-86

Rotor System - Main Rotor Head - Spindle Assembly - Elastomeric Spherical Bearings - Inspection of

YES

70-05-8

11-18-88

Rotor System - Main Rotor Blade Retaining Expandable Pins - One-Time Inspection of

NO EFFECT

70-05-9

05-08-89

Rotor Systems - Main Rotor Hub Assembly - Spindle Attachment Bolts and Upper Pressure Plate Attachment Bolts Inspection for Correct Length Bolts

NO EFFECT

70-05-10B

09-28-90

Rotor Systems - Tail Rotor Blade Assemblies - Pitch Change Horns, Pivot Bearing End Plates and Retainers - Inspection for Application/Condition of Primer Coating

YES

Change 7

NO EFFECT

ASB/CSN-5

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-05-11

10-11-89

Rotor System - Main Rotor Pitch Control Horn Assemblies Inspection of

NO EFFECT

70-05-12B

10-21-92

Rotor System - Main Rotor Blade Retaining Expandable Pins - Inspection of

YES

70-05-13A

10-23-90

Rotor System - Tail Rotor Pitch Beam Assembly Retaining Washer and Retaining Nut Torque Stabilization - Inspection of

YES

70-05-14

01-11-91

Rotor System - Tail Rotor Pitch Beam Assembly Retaining Washer - Replacement of

NO EFFECT

70-05-15B

11-13-92

Rotor System - Main Rotor Head Elastomeric Spherical and Thrust Bearings - Inspection for Elastomer Extrusion

YES

70-05-16B

03-12-93

Rotor System - Tail Rotor Blade Assembly - Horn Assembly - Inspection of

YES

70-05-17A

02-20-95

Rotor System - Main Rotor Head - Elastomeric Thrust Bearings Manufactured by Chicago Rawhide - Inspection and Replacement of

NO EFFECT

70-05-18A

07-17-92

Rotor System - Improved Main Rotor Blade Retaining Expandable Pins - Incorporation of

NO EFFECT

70-05-19A

05-20-92

Rotor System - Tail Rotor Blade Assembly - Pivot Bearing Assembly - Reshimming of

YES

70-05-20

06-12-92

Rotor System - Tail Rotor Pitch Beam Assembly - One-Time Inspection of

NO EFFECT

70-05-21

06-30-95

Rotor System - Main Rotor Blade - Tip Cap Assembly Inspection for Cracks

YES

70-05-22

10-27-92

Rotor System - Tail Rotor Blade Assemblies - Inspection for Spar Integrity

YES

70-05-23

12-02-92

Flight Control/Main Rotor System Malfunctions - Recommended Procedures

NO EFFECT

70-05-24A

11-05-96

Rotor System - Main Rotor Spindle Assembly - One-Time Inspection and Refurbishment of Spindle and Liner

NO EFFECT

ASB/CSN-6

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-05-25

07-19-96

Rotor System - Main Rotor Hub - One-Time Inspection for Edge Break (Deburred) Condition and Cracks

NO EFFECT

70-05-26

09-10-96

Rotor System - Main Rotor Spindle Assembly - One-Time Inspection for Excessive Wear of Journal Bearing

NO EFFECT

70-05-27

11-04-96

Rotor System - Main Rotor Swashplate Assemblies Overhauled by Sikorsky Aircraft - Return of

NO EFFECT

70-05-28B

09-27-99

Rotor System - Main Rotor Hub - Recurring NDI Inspection Implementation of

NO EFFECT

70-05-29

05-20-99

Rotors - Main Rotor Blade Attachment Expandable Pin - OneTime Inspection of

NO EFFECT

70-05-30A

05-19-00

Rotor System - Main Rotor Hub - Removal and Return for Rework

NO EFFECT

70-05-31

06-05-00

Rotor System - Main Rotor Blade Retaining Expandable Pins - Inspection of

YES

70-05-32

06-24-02

Rotor System - Main Rotor Blade Expandable Pins - Pivot Pin Inspection of

NO EFFECT

70-05-33

09-29-03

Rotor System - Main Rotor Damper Hydraulic Fitting - OneTime Inspection of the Hose Disconnect Coupling

NO EFFECT

70-05-34

05-24-04

Rotor System - Main Rotor Blade (MRB) - Cuff - One-Time Inspection of

NO EFFECT

70-05-35

05-26-06

Rotor System - Main Rotor Swashplate Assemblies - Inspection of Upper Duplex Bearing

NO EFFECT

70-05-36

11-07-06

Rotor System - Main Rotor Blade Expandable Pins - Pivot Pin Inspection of

NO EFFECT

70-05-38

11-05-07

Rotor System - Main Gear Box (MGB) - Rotor Brake Bracket - One-Time Inspection of

NO EFFECT

70-05-39A

03-23-12

Rotor System - Main Rotor Hub - Damper Bracket Attachment Hole Eddy Current Inspection

NO EFFECT

70-06-1A

11-30-85

Flight Controls - Main Gear Box Flight Controls - Inspection and Check of Flight Controls Mount Dowel Pins

YES

Change 7

ASB/CSN-7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-06-2A

04-10-85

Drive System - Inspection of Section I Tail Drive Shaft Flexible Couplings

YES

70-06-3

07-26-85

Drive System - Tail Rotor Drive Shaft Bearings - Inspection of

YES

70-06-4

03-06-86

Drive System - Tail Gear Box Assembly Mounting Surfaces Inspection of

NO EFFECT

70-06-5A

09-11-87

Drive System - Intermediate Gear Box - Inspection for Presence of Lubrication Hole

NO EFFECT

70-06-6B

01-15-90

Drive System - Main, Intermediate, and Tail Gear Box Assemblies Chip Detectors - Inspection of

YES

70-06-7A

10-30-87

Drive System - Main Gear Box Main Module Sump Assembly Pressure Regulators - Inspection/Adjustment of

NO EFFECT

70-06-8A

10-30-87

Drive System - Tail Rotor Drive Shaft Installation Hardware Inspection of

YES

70-06-9D

12-11-87

Drive System - Fan and Radiator Assembly - Shaft and Cooler Installation - Inspection of

YES

70-06-10A

05-03-88

Drive System - Tail Gear Box Assembly - Output Bevel Gear - One-Time Inspection of

NO EFFECT

70-06-11

09-14-89

Drive System - Main Gear Box Housing - Inspection for Interference with Forward Longitudinal Bellcrank Assembly

NO EFFECT

70-06-12

10-06-89

Drive System - Oil Cooler Fan and Radiator Assembly - Axial Fan Assembly - One-Time Check of Serial Number

NO EFFECT

70-06-13

10-06-89

Drive System - Main Transmission - Main Module - Oil Filter Bowl Retention Bolts - Inspection for Proper Length

NO EFFECT

70-06-14A

01-17-90

Drive System - Oil Cooler Fan and Radiator Assembly - Axial Fan Assembly - One-Time Inspection for Improperly Manufactured Shafts

NO EFFECT

70-06-15A

06-25-92

Drive System - Tail Gear Box Inboard Retention Plate Assembly - One-Time Inspection and Recurring Torque Check

NO EFFECT

ASB/CSN-8

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-06-16

09-30-91

Transmission System - Oil Cooler Lubrication Hose Assemblies - Inspection for Chafing; Oil Cooler Fan - Inspection for Debris Collecting on Rotor

YES

70-06-17A

02-11-99

Drive System - Grease-Packed Bearings - Establishment of Time Interval for Replacement of

YES

70-06-18

10-23-91

Drive System - Disconnect Coupling Input Jaw Sliding Spline - Inspection of

NO EFFECT

70-06-19B

01-10-95

Drive System - Tail Gear Box Assembly with 70358-06620101 Output Bevel Gear - Replacement of

NO EFFECT

70-06-20

03-12-93

Drive System - Oil Cooler Fan and Radiator Assembly - Axial Fan Assembly - One-Time Inspection of Shaft

NO EFFECT

70-06-21

08-20-96

Drive System - Disconnect Coupling Shaft - Inspection of

NO EFFECT

70-06-22

10-21-96

Drive System - Tail Disconnect Coupling Shaft - One-Time Nondestructive Inspection (NDI) of

NO EFFECT

70-06-23

11-07-01

Drive System - Oil Cooler Drive Shaft - One-Time Inspection of Oil Cooler Drive Shaft Flange Connection

NO EFFECT

70-06-24B

12-20-02

Drive System - Main Gear Box (MGB) - Planetary Carrier Assembly - Initial Ultrasonic Testing (UT) and Recurring Inspection of

NO EFFECT

70-06-25

07-18-03

Drive System - Main Gear Box (MGB) - Planetary Carrier Assembly - Service Life - Establishment of

NO EFFECT

70-06-26

03-18-04

Drive System - Tail Rotor Drive Shaft Flange Nut Cotter Pin - One-Time Check and Torque Check of

YES

70-06-28A

05-21-09

Drive System - Tail Rotor Gear Box (TGB) - Output Shaft Initial Ultrasonic Test (UT) Inspection of

YES

70-06-29B

02-20-12

Drive System - Tail Gear Box (IGB) - One-Time Borescope Inspection Of

NO EFFECT

70-07-1

02-17-93

Pneudraulics - Hydraulic Pump Modules - Bleed/Relief Valve - Inspection of

NO EFFECT

70-07-02

05-07-01

Pneudraulics - Auxiliary Power Unit (APU) Accumulator One-Time Inspection of

NO EFFECT

Change 7

ASB/CSN-9

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

70-07-03

12-23-02

Pneudraulics - Hydraulic System - One-Time Inspection of

NO EFFECT

70-07-04

11-29-07

Pneudraulics - Hydraulic Systems - One-Time Inspection of Pressure and Return Hydraulic Tubes for Preload Condition

NO EFFECT

70-07-05

05-17-11

Pneudraulics - Hydraulic System - One-Time Inspection for Upper Hydraulic Line Chaffing

YES

70-07-06A

10-12-11

Pneudraulics - Hydraulic System - One-Time Inspection of Solenoid Valves

NO EFFECT

70-08-1

07-18-85

Instrument System - Pilot Display Units - Main Rotor RPM Scale - Remarking of

NO EFFECT

70-09-1

07-21-85

Electrical System - Stabilization Augmentation System (SAS)/Flight Path Stabilization (FPS) and Stabilator Control Systems Connectors - Inspection of

NO EFFECT

70-09-2

05-06-86

Electrical System - Stabilator Controls/Automatic Flight Control Panel - Relocation of

YES

70-09-3

04-06-88

Electrical System - Battery - Modification of

YES

70-09-4

09-06-89

Electrical System - Left and Right Relay Panel Assemblies Inspection of Grounding Modules

NO EFFECT

70-09-5

12-04-91

Utility System - Fire Extinguisher System - Fire Extinguisher Containers - Pressure Cartridges Electrical Connections Inspection for Corrosion Damage

YES

70-09-6

10-03-91

Electrical Systems - Fire Detection System - One-Time Check for Proper Operation

NO EFFECT

70-09-07

03-08-00

Electrical Systems - SX-16 Nightsun Searchlight - One-Time Inspection of

NO EFFECT

70-09-08

06-26-03

Electrical System - Circuit Breakers - Glare Shield Lights Circuit Breaker - Replacement of

YES

70-09-09

10-08-07

Electrical Systems - Cockpit and Lower Fuselage Wiring One-Time Inspection for Chafed Wires

NO EFFECT

70-09-12

03-20-12

Electrical System - Left Hand Relay Panel - One-Time Inspection for Wire Chafe Condition and Harness Clearance

NO EFFECT

ASB/CSN-10

Alert Service Bulletins

Incorporated

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-10-1

03-22-85

Fuel System - Pressure Refueling Receptacle - Inspection of Closed Circuit Adapter

NO EFFECT

70-10-2

12-14-89

Fuel System - No. 1 and No. 2 Fuel Cells - Fuel Lines Inspection for Chafing - Repositioning and Reclamping of

YES

70-10-3

03-05-91

Fuel System - Fuel Dump System

70-10-4B

10-28-93

Fuel System - Engine Fuel Feed System Integrity Test

70-10-5

04-13-93

Mission System - 120 Gallon Auxiliary Fuel Tank - Restriction on Usage

NO EFFECT

70-10-6

07-13-99

Fuel System - Engine Fuel Crossfeed Breakaway Valve Establishment of 1500 Hour Retirement Time

YES

70-10-7

04-20-04

Fuel System - ESSS Fuel Vent Tube Elbow - Replacement of

YES

70-10-8

08-18-09

Fuel System - No. 2 Engine Fuel Inlet Hose and Fire Extinguisher Nozzle Clearance - On-Time Inspection of

YES

70-10-10A

08-09-10

Fuel System - One-Time Inspection and Corrective Action of

NO EFFECT

70-10-11

08-16-11

Fuel System - Bulkhead Break-Away Valves 70307-03034103 - On-Time Inspection and Correct Sealant Application

YES

70-11-1

11-16-84

Flight Controls System - Inspection of Tail Rotor Control Cables

NO EFFECT

70-11-2

N/A

70-11-3

04-04-85

Flight Controls System - Mixer Assembly - Inspection of Linkages

NO EFFECT

70-11-4

05-08-85

Flight Controls System - Inspection of

NO EFFECT

70-11-5

06-18-85

Flight Controls System - Tail Rotor Control Cables Tension Inspection of

YES

70-11-6A

05-09-86

Flight Controls System - Controls Installation - Main Rotor/ Tail Rotor Pitch Control Rod Pawl Bolts - Installation of

YES

70-11-7

05-21-86

Flight Controls System - Primary Servo Assembly - Pressure Switch Actuator Adapter Attach Screws - Inspection of

NO EFFECT

NO EFFECT

Not Issued

YES

N/A

Change 7

ASB/CSN-11

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

70-11-8

N/A

70-11-9

Alert Service Bulletins

Incorporated

Not Issued

N/A

09-25-86

Flight Controls System - Primary Servo Assembly Attachment Bolts Torque - Inspection of

YES

70-11-10A

10-30-87

Flight Controls System - Collective and Yaw Boost Servo Pistons - Inspection of

YES

70-11-11B

02-09-89

Flight Controls System - Pitch Bias Actuator (PBA) Replacement of

YES

70-11-12A

10-30-87

Flight Controls System - Pitch Trim Assembly Actuator Output Clevis - Inspection of

NO EFFECT

70-11-13A

09-10-87

Flight Controls System - Stabilator Amplifier - Pin Connector Hardware - Inspection of

NO EFFECT

70-11-14B

09-24-93

Flight Controls System - Controls Installation - Swashplate Linkage Spherical Bearings - Inspection of

YES

70-11-15

11-22-88

Flight Control System - Pilots and Copilots Cyclic Pitch Control Installation - Inspection of

YES

70-11-16

08-14-91

Operator’s Manuals - Flight Controls Check - Additional Preflight/Run-Up Checks - Incorporation of

YES

70-11-17

11-19-91

Flight Controls - Pilot’s Collective Stick Friction Device Installation/Clarification of Adjustable Stop and Collet Blocks Attachment Bolts

YES

70-11-18

11-13-92

Flight Controls - Tail Rotor Pitch Control Shaft Assembly One-Time Inspection

NO EFFECT

70-11-19

07-20-92

Flight Control Systems - Directional Adjuster Assembly Input Arm Assembly Attaching Hardware - Inspection of

NO EFFECT

70-11-20C

08-10-94

Flight Controls Systems - Main Rotor Flight Controls 70400-08159 Series Self-Retaining Bolts - Inspection, Application of Corrosion Preventive Compound, and Reduction of Installation Torque

YES

70-11-21A

05-17-95

Flight Control Systems - Main Rotor Flight Controls - 7040008159 Series Self-Retaining Bolts and SS5092-12 and SS5092-14 Nuts - Replacement of

NO EFFECT

ASB/CSN-12

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-11-22

05-01-97

Flight Controls Systems - Forward Support Assembly 70400-08162-042 - Segmented Bonded Liners - One-Time Inspection of

NO EFFECT

70-11-23

06-05-97

Flight Control System - Primary Servo Assembly - 7040002820 Series - Output Rod End - One-Time and Recurring Inspection of

NO EFFECT

70-11-24

12-07-98

Flight Controls - Tail Rotor Pitch Control Shaft Assembly One-Time Inspection of Log Cards

NO EFFECT

70-11-25

09-22-99

Flight Controls System - Pilot’s and Copilot’s Cyclic Stick Wire Harness - One-Time Inspection of

NO EFFECT

70-11-26A

11-01-00

Flight Control - Yaw Boost Servo SAS - One-Time Inspection of Pilot-Assist Servo SAS Actuator Connecting Links

NO EFFECT

70-11-27

03-21-01

Flight Controls - Main Rotor Flight Controls - 70400-08159 Series Self-Retaining Bolts - One-Time Inspection and Application of Corrosion Preventive Compound

YES

70-11-28

05-31-01

Flight Controls System - Primary Servo Assembly - OneTime Inspection of

NO EFFECT

70-11-29

12-06-01

Flight Controls System - Pitch Trim Assembly - One-Time Inspection of

NO EFFECT

70-11-30

02-13-06

Flight Controls System - Collective and Yaw Boost Servo Assemblies - One-Time Inspection of

NO EFFECT

70-11-31

09-07-06

Flight Controls System - Tail Rotor - Spring Capsule Assemblies - Calender Replacement

YES

70-11-32

10-18-06

Flight Controls System - Bellcrank Assembly, Mixer Yaw Output Flight Control - Flight Control Mixer - One-Time Inspection of

YES

70-11-33

12-06-06

Flight Control System - Autorotation RPM Correction Chart One-Time Inspection of Aircraft Log

NO EFFECT

70-11-35

12-07-09

Flight Control System - Stability Augmentation System (SAS) Link Assembly, One-Time Inspection of

YES

70-11-36

12-08-09

Flight Controls - Tail Rotor - Tail Rotor Servos - One-Time Inspection for Missing Cotter Pins

YES

Change 7

ASB/CSN-13

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-11-37

07-02-10

Flight Controls - Cyclic Stick - One-Time Inspection of Cyclic Stick Wiring Harness

YES

70-11-38

05-02-11

Flight Controls - Cyclic Stick - One-Time Inspection For Presence Of Safety Cable Installed On Lateral Stick Stops

NO EFFECT

70-12-1A

09-25-87

Utility System - Fire Detection and Extinguishing System Installation - Directional Control Valve - Inspection of

YES

70-12-2B

01-17-92

Utility System - Fire Detection and Extinguishing System Installation - Fire Extinguisher Tube Assembly and Pneumatic Tube Assembly - Inspection of/Additional Clamping of

NO EFFECT

70-12-3

03-16-90

Utility System - Fire Extinguishing System Installation - Harness Assembly - Inspection for Proper Connections at Cartridges of Fire Extinguishing Containers

NO EFFECT

70-12-4

03-26-91

Utility System - Fire Detection and Extinguishing System Installation - Reserve Tube Assemblies - One-Time Inspection for Connection at Fire Extinguishing Container

NO EFFECT

70-12-5

12-04-91

Utility System - Fire Extinguisher System - Fire Extinguisher Containers - Pressure Cartridges Electrical Connectors Inspection for Corrosion Damage

YES

70-12-6A

01-15-09

Utility System - Fire Detection and Extinguishing System Installation - Perform a One-Time Visual Inspection for Proper Installation of Red Jewel Thread on Fire Extinguisher Wiring

NO EFFECT

70-12-07

11-02-09

Utility System - Fire Extinguisher Tube Assembly Connections, Perform a One-Time Visual Inspection of

YES

70-12-09

10-26-11

Utility System - Fire Extinguisher Tube Assembly Connections, Perform a One-Time Visual Inspection of

YES

70-13-1

05-06-92

Environment Control System - Air Conditioner - Servicing and Deservicing - Improvements

YES

70-13-2A

11-05-03

Environmental Control System - Air Conditioner - Servicing and Deservicing - Improvements

NO EFFECT

70-14-1A

09-12-96

Avionics - LITEF Attitude and Heading Reference System (AHRS) - Removal of Flight Restriction in Areas of High Intensity Radiated Field (HIRF)

NO EFFECT

ASB/CSN-14

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-14-02

06-27-01

Avionics - Tail Rotor Drive Shaft Cover - Global Positioning System (GPS) Antenna Installation - One-Time Inspection of

NO EFFECT

70-14-03

08-03-04

Avionics - AN/ALQ-144 IRCM Upper Harness Assembly One-Time Inspection and Installation of Anti-Chafe Protective Grommet

NO EFFECT

70-14-04

06-18-12

Avionics - Attitude and Heading Reference Set - One-Time Inspection of NAVEX012 Attitude and Heading Reference System (AHRS) Harness Connections

NO EFFECT

70-15-1A

09-30-87

Auxiliary Power Plant System - Auxiliary Power Unit Lines Installation - Inspection of

NO EFFECT

70-15-2A

09-06-89

Auxiliary Power Plant System - Initiation of Auxiliary Power Unit (APU) Overhaul Life in Terms of APU Starts

YES

70-16-1A

09-30-87

Mission Equipment - Rescue Hoist - Level Wind Shafts Shims/Keyways - Inspection of

NO EFFECT

70-16-2B

10-20-93

Mission Equipment - Rescue Hoist (Breeze Eastern) Hook Inspection of; Revised Installation Instructions and Inspection Gap Check - Incorporation of

YES

70-16-3

12-06-88

Mission Equipment - Rescue Hoist - Load Cable and Hook/ Bumper Assembly Stowage - Inspection of

YES

70-16-4

09-12-89

Mission Equipment - Cargo Hook - Warning Plate - Addition of

NO EFFECT

70-16-5

11-03-89

Mission Equipment - Rescue Hoist - One-Time Inspection of

NO EFFECT

70-16-6

05-08-90

Mission Equipment - Rescue Hoist One-Time Inspection of Load Cable

NO EFFECT

70-16-7

02-20-91

Mission Equipment - Cargo Hook - One-Time Inspection of Cartridge Actuating Device (CAD) Wire Assembly for Proper Installation

NO EFFECT

70-16-8

05-10-93

Mission Equipment - External Stores Support System (ESSS) - Revised Procedures for Operator’s Manual - Incorporation of

NO EFFECT

Change 7

ASB/CSN-15

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 ALERT SERVICE BULLETINS (Cont)

Number

Date

Alert Service Bulletins

Incorporated

70-16-9

07-17-95

Mission Equipment - Rescue Hoist Assembly Hook Installation - Write-In Changes to Maintenance Manual and Illustrated Parts Breakdown - Incorporation of

YES

70-16-10A

06-19-95

Mission Equipment - Rescue Hoist - Airframe Fitting and Support Arm and Base Assemblies - One-Time Inspection of; Removal of Seals and Grommet

NO EFFECT

70-16-11

06-06-96

Mission Equipment - Lucas External Rescue Hoist Assembly - Temporary Reduction in Service Limit

NO EFFECT

70-16-12

09-22-99

Mission Equipment - Rescue Hoist Hook Retention Spring Pin - Replacement of

YES

70-16-13

10-11-00

Mission Equipment - Hoists and Winches - Rescue Hoist Assembly - Hook Assembly Retention Pin - One-Time and Recurring Inspection of

NO EFFECT

70-16-14

02-17-04

Mission Equipment - Electric Rescue Hoist Assembly Controller Assembly - Repair of

NO EFFECT

70-16-17

09-23-09

Mission Systems - Gun Mount Assembly - External Electrical Power Feeder Cable Harness Assembly and Cotter Pin, Perform a One-Time Visual Inspection of

YES

70-16-18

11-19-09

Utility - Lifesavings System D-LOK Hook Replacement Inspection of

NO EFFECT

70-16-19

12-10-09

Utility - Rescue Hoist Cable Cutter Harness Connector Safety Wire - Inspection of

YES

70-16-20

09-20-11

Utility - Breeze Eastern Rescue Hoist - Hydraulic Brake Adapter/Adapter Assembly Retrofit Procedure

YES

70-16-21

08-08-11

Rescue System - Cartridge Activated Device (CAD) - One Time Inspection and Corrective Action of

YES

70-16-22

06-13-12

Hoists and Winches - Rescue Hoist - One-Time Inspection of Hoist Cable for Correct Installation and Cable Anchor Set Screw for Correct Torque

NO EFFECT

70-82-1B

09-03-93

Ground Support Item - Main Rotor Blade Lifting Clamp Assembly - Inspection of

NO EFFECT

ASB/CSN-16

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 CUSTOMER SERVICE NOTICES Number

Date

Customer Service Notice

Incorporated

70-1

12-18-85

Airframe System - Stabilator System - Inspection Ports Incorporation of

NO EFFECT

70-2

09-10-85

Auxiliary Power Plant System - APU Assembly - Lubricating Oil Sump - Servicing of

YES

70-3A

02-26-86

Drive System - Section I Tailcone Drive Shaft Assembly Replacement of

YES

70-4

02-08-89

Airframe System - Passenger Doors - Electrical Door Locks Lever Assembly - Replacement of; Electrical Actuator Reinstallation of

NO EFFECT

70-5

06-06-86

Flight Controls System - Directional Controls Installation Wide Body Pulleys/Nylon Keeper Pins - Installation of

YES

70-6C

10-16-87

Major Components - Maximum Time Between Replacement

YES

70-7

11-14-85

Drive System - Tail Cone Drive Shaft Installation - Flex Coupling Spherical Washers - Replacement of

YES

70-8

11-21-91

Rotor Systems - Main and Tail Rotor Blades Erosion Protection Kit - Installation of

YES

70-9

04-04-86

Drive System - Main Transmission Assembly - Input Module Gear Box Assembly - Modification of

NO EFFECT

70-10

07-05-89

Mission Equipment - Cargo Hook - Cartridge Actuating Device (CAD) Assembly - Replacement of

YES

70-11

08-27-87

Mission Equipment - Rescue Hoist and Electrical Installation - Options Availability of

YES

70-12

04-18-86

Airframe System - External Rescue Hoist - Shear Panel Modification of

NO EFFECT

70-13

04-18-86

Airframe System - Stabilator Assembly - Actuator Electro Mechanical Linear - Replacement of

NO EFFECT

70-14B

04-11-89

Drive System - Gear Box Assembly - Accessory Module Inspection of

NO EFFECT

70-15A

06-11-96

Flight Control System - Pilot and Copilot Cyclic Stick Assemblies - Stabilator Slew Switch - Incorporation of

YES

Change 7

ASB/CSN-17

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 CUSTOMER SERVICE NOTICES (Cont)

Number

Date

Customer Service Notice

Incorporated

70-16

11-23-87

Navigational Equipment - LTN-3000/3100 OMEGA/VLF Program Replacement of

NO EFFECT

70-17B

06-22-88

Drive System - Main Module Rotor Brake Installation Torqueless Grips - Installation of

YES

70-18A

03-01-89

Drive System - Main Gear Box - Use of Alternate Lubricating and Scavenge Pump

NO EFFECT

70-19

10-03-88

Mission Equipment - Rescue Hoist Support Bracket Assembly - Replacement of

YES

70-20C

01-04-88

Drive System - Fan and Radiator Assembly - Shaft and Cooler Installation - Spline Wear Indicator System Installation/ Inspection of

YES

70-21

09-12-89

Communications Systems - High Frequency/Single Sideband (HF/SSB) Antenna Wire Standoff Masts - Modification of

NO EFFECT

70-22

06-14-91

Electrical System - Left and Right Relay Panel Assemblies Electromagnetic Interference (EMI) Protection - Incorporation of

YES

70-23

04-13-92

Airframe Systems - Left and Right Stubwings - 4P Roll Vibration Absorbers - Incorporation of

YES

70-24A

11-05-91

Rotor System - Main Rotor Blade - Shim Weights - Inspection for Interference

YES

70-25

01-17-91

Rotor System - Main Rotor Blade - Tip Cap Assembly - Additional Procedures for Installation

YES

70-26

01-14-91

General - Discoloration of Parts Made of 15-5PH Corrosion Resistant Steel Material

YES

70-27A

10-18-91

Airframe System - Improved Bolts for Tiedown Fittings Incorporation of

YES

70-28

04-16-91

Powerplant - Engine Air Inlet Assemblies - Alignment Pins and Receptacles - Inspection for Proper Orientation of Assembled Components

NO EFFECT

70-29

10-07-91

Flight Controls System - Maintenance Task/Procedures Manuals - Tail Rotor Control Maintenance/Rigging Procedures - Changes to

YES

ASB/CSN-18

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 CUSTOMER SERVICE NOTICES (Cont)

Number

Date

Customer Service Notice

Incorporated

70-30

12-02-91

Mission Equipment - External Rescue Hoist - Identification Plates - Inspection for Security

YES

70-31A

11-14-95

Landing Gear System - Tail Landing Gear Strut Assembly Establishment of Maximum Time Between Overhauls

RESCINDED

70-32

02-25-92

Flight Manuals - Systems Description - Operation of Gust Lock Switch

NO EFFECT

70-33

05-07-91

Aircraft Operator’s Manual - Change to Limitations

NO EFFECT

70-34

10-21-91

Transmission System - Oil Cooler Lubrication Hose Assemblies - Installation of Bracket Assembly and Additional Clamps to Prevent Chafing

YES

70-35

09-30-91

Airframe System - Tail Rotor Pylon Skin Panels and Tail Gear Box Support Fitting - Inspection for Cracks

YES

70-36

10-18-91

Ground Support Items - Main Rotor Blade Restraint Sets One-Time Inspection of

NO EFFECT

70-37

11-15-91

Drive System - Spline Wear Inspection - Changes in Inspection Procedure

YES

70-38

12-05-91

Electrical System - Stepped Down Voltage for Doppler Computer Display - Incorporation of

NO EFFECT

70-39

03-16-93

Flight Control System - Main Rotor Flight Controls - Aft Cyclic Rigging Change

YES

70-40

11-13-91

Flight Controls System - Fault Isolation/Testing and Troubleshooting Procedures Manuals - Changes to

NO EFFECT

70-41

10-15-91

Airframe System - Transmission Drip Pan Assembly Perimeter Bulb Seals - Replacement of

NO EFFECT

70-42C

01-14-97

Flight Control System - Tail Gear Box - Pitch Control Shaft Assembly (Coupling Assembly) and Tail Rotor Servo - Additional Inspection Procedures and Changes

YES

70-43A

09-02-93

Power Plant System - Engine Load Demand System (LDS) Operational Force Check Procedure - Incorporation of; LDS Cable Spring Pins - Establish Replacement Time - LDS and Power Available System (PAS) Rotary Inputs - Lubrication Requirements

YES

Change 7

ASB/CSN-19

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 CUSTOMER SERVICE NOTICES (Cont)

Number

Date

Customer Service Notice

Incorporated

70-44

02-21-92

Operator’s Manuals - Emergency Procedures - Changes and Additions to

NO EFFECT

70-45A

01-22-93

Drive System - Main Gear Box Oil Filter - Revised Filter Element Replacement Requirements

YES

70-46

01-17-92

Power Plant - Engine Air Inlet Assembly - Bleed Air Exhaust Slots - Rework to Prevent Cracking

NO EFFECT

70-47A

04-21-92

Airframe System - Stabilator Retractable Pin - Tailcone Pin Puller - Replacement of Washers

NO EFFECT

70-48

01-28-92

Airframe System - Magnetic Anomaly Detector (MAD) Structure Assembly - Corrosion Repair of

NO EFFECT

70-49

09-09-92

Flight Controls/Transmission Systems - Main Transmission Control Bridge Forward Support - Inspection for Corrosion Replacement of Insulator

NO EFFECT

70-50

01-31-92

Power Plant System - Garrett Pneumatic Starter - Oil Servicing - Incorporation of Improved Procedure

YES

70-51

07-21-93

Power Plant System - Engine Exhaust Ejector Assemblies Change Inspection Interval

NO EFFECT

70-52A

06-01-93

Mission Equipment - External Stores Support System (ESSS) Ejector Rack Assembly - Inspection of

NO EFFECT

70-53

12-17-92

Airframe System - Left and Right Engine Cowlings/Work Platforms - Fitting Assemblies and Support Assemblies Establishment of Wear Limits and Repair Procedures

YES

70-54

07-07-92

Airframe/Avionics - Civil Navigation (AN/ARN-123 (V)) System - VOR/LOC Antenna Mounting Installations - Inspection of

NO EFFECT

70-55B

03-31-93

Transmission System - One-Piece Oil Cooler Drive Shaft Incorporation of

YES

70-56

07-01-92

Rotor System - Main Rotor - Revised Check for Damper Leakage

YES

70-57

11-10-93

Landing Gear - Wheel and Tire Assemblies - Inspecting, Servicing, and Maintenance - Additional Information/ Procedures

YES

ASB/CSN-20

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 CUSTOMER SERVICE NOTICES (Cont)

Number

Date

Customer Service Notice

Incorporated

70-58

11-16-92

Fuel System - Fuel Dump System Shutoff Valve - Support Bracket - Inspection/Modification of

NO EFFECT

70-59

12-02-92

Mission Equipment - External Stores Support System (ESSS) - Range Extension System - Inboard and Outboard Fuel Shutoff Gate Valves - Resistance Test/Inspection of

YES

70-60

07-12-93

Airframe System - Nose Door Mounted Fittings and Canopy Mounted Hinges - Inspection for Cracks

YES

70-61

12-02-92

Transmission System - Oil Cooler Axial Fan Assembly Replacement of

NO EFFECT

70-62A

03-24-94

Flight Control Systems - Tail Rotor Rigging - 3° Tail Rotor Bias - Incorporation of

YES

70-63

01-29-93

Powerplant (Fuel System) - Hydromechanical Control Units (HMUs) - Inspection for Leaks

NO EFFECT

70-64

08-09-93

Rotor System - Main Rotor - Fault Isolation/Testing and Troubleshooting Procedures - Changes to

NO EFFECT

70-65A

01-18-96

Mission System - Cargo Hook - Electrical Housing - OneTime Inspection for Corrosion

NO EFFECT

70-66

02-17-93

Power Plant/Enviromental Control System (ECS) - Engine Bleed-Air Switches - Improved Corrosion Protection - Application of

NO EFFECT

70-67

02-17-93

Power Plant System - Engine Waterwash Interconnect Tube Assembly and Elbow - Replacement of; Hose Assembly Incorporation of

NO EFFECT

70-68

02-22-93

Instrument System - Pitot Tube Installations - Inspection of; Improved Corrosion Protection - Incorporation of

NO EFFECT

70-69

02-22-93

Rotor System - Bladefold and Blade De-Ice Harnesses Bonding Strap Terminals and Attaching Screws - Application of Corrosion Preventive Compound

NO EFFECT

70-70

03-18-93

Rotor System - Main Rotor Pitch Lock Assembly - Sealing Compound - Application of

NO EFFECT

70-71

03-19-93

Utility System - Fire Extinguisher System Components Inspection for Corrosion

NO EFFECT

Change 7

ASB/CSN-21

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 CUSTOMER SERVICE NOTICES (Cont)

Number

Date

Customer Service Notice

Incorporated

70-72

03-01-93

Airframe System - Left and Right Stubwing Structure - Float Cover Attachment Straps - Inspection for Corrosion; Application of Protective Finishes

NO EFFECT

70-73

03-12-93

Airframe and Landing Gear Systems - Main Recovery, Assist, Secure, and Traverse (RAST) Probe Assembly - Lower Housing Assembly Adapter - Lubrication of

NO EFFECT

70-74

08-31-93

Drive System - Tail Gear Box Slipring Mounting Bosses Inspection for Damage and/or Corrosion; Tail Gear Box Fairing Seal Retainers - Inspection for Chafing

NO EFFECT

70-75B

04-18-94

Flight Control System - Flight Control Rods - Inspection for Corrosion; Application of Corrosion Preventive Compound

NO EFFECT

70-76A

12-15-93

Airframe System - Electrical Bay Doors and Avionics Bay Access Doors - Replacement of Seals; Improved Corrosion Protection

NO EFFECT

70-77

03-01-93

Airframe System - Left and Right Crew Doors - Holdopen Pin Assemblies - Improved Corrosion Protection - Application of

NO EFFECT

70-78

11-15-93

Airframe System - Nose Door Seals - Replacement of Seals for Improved Corrosion Protection; Addition of Seal to Control Water Runoff When Door is in Open Position

NO EFFECT

70-79

03-31-93

Airframe System - Main Rotor Pylon Structure - Additional Corrosion Protection; Sealing Strips for APU Covers Incorporation of

NO EFFECT

70-80

03-31-93

Airframe System - Flight Control Access Panels - Door Assemblies - Improved Method of Sealing for Water Integrity

NO EFFECT

70-81

03-18-93

Airframe and Landing Gear Systems - Main Recovery, Assist, Secure, and Traverse (RAST) Probe Insert Cover Plate Assembly - Addition of Drain Hole to Prevent Water Entrapment

NO EFFECT

70-82

04-14-93

Airframe System - Canopy Window and Windshield Installations - Replacement of Attaching Hardware for Improved Corrosion Protection

NO EFFECT

70-83

03-17-93

Airframe System - Extended Weapon Support Installation Drain Holes - Incorporation of

NO EFFECT

ASB/CSN-22

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 CUSTOMER SERVICE NOTICES (Cont)

Number

Date

Customer Service Notice

Incorporated

70-84

03-12-93

Avionics System - UHF/TACAN/IFF/Sonobuoy Antennas Additional Corrosion Protection - Incorporation of

NO EFFECT

70-85

04-20-93

Airframe System - Main Rotor Pylon Strap - Application of Sealing Compound; Auxiliary Power Unit (APU) Access Cover Assembly - Replacement of Seals for Improved Corrosion Protection

NO EFFECT

70-86

03-18-93

Airframe System - Doppler Antenna Support Structure Improved Corrosion Protection - Incorporation of

NO EFFECT

70-87

09-21-93

Airframe System - Left and Right Crew Doors - Electrical Grounds - Inspection for Corrosion; Additional Corrosion Protection - Application of

NO EFFECT

70-88

06-12-95

Communication System - ICS Cord Wiring Installation - Reclamping of

NO EFFECT

70-89B

04-18-94

Flight Controls System - Flight Control Rods - Inspection for Corrosion; Application of Corrosion Preventive Compound

YES

70-90

09-28-93

Mission Equipment - External Stores Support System (ESSS) - Bleed Air Regulator Valves and Check Valves - Cleaning Procedures - Incorporation of

YES

70-91A

01-13-97

General - Special 90-Day Corrosion Inspection and Treatment Plan to Improve Corrosion Control - Incorporation of

YES

70-92

10-28-93

Drive Systems - Main Gear Box - Oil Leakage Through Breather Due to Excess Pressure Buildup - Corrective Action

YES

70-93

05-12-93

Drive System - Tail Rotor Drive Shaft Viscous Damper Bearings - One-Time Inspection to Determine If Replacement Bearings Were Improperly Serviced at Time of Installation

NO EFFECT

70-94

09-14-94

Digital Automatic Flight Control System - Testing and Troubleshooting Procedures - Accelerometer Nulling

NO EFFECT

70-95

05-22-95

Power Plant System - General Electric CT7 Turboshaft Engine Fuel Injector Maintenance and Inspection Criteria

NO EFFECT

70-96

12-07-93

Airframe System - Tail Cone - Flux Valve Fairing Installations - Replacement of Attaching Hardware; Application of Additional Corrosion Protection

NO EFFECT

Change 7

ASB/CSN-23

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 CUSTOMER SERVICE NOTICES (Cont)

Number

Date

Customer Service Notice

Incorporated

70-97

03-16-95

General - Corrosion Prevention Checklist and Treatment Plan - Incorporation of

NO EFFECT

70-98

05-05-94

Airframe System - Cockpit Canopy/Cabin Upper Joining Installation and Nose Door Jamb Installation - Modification of; Improved Corrosion Protection - Incorporation of

NO EFFECT

70-99

09-10-93

Electrical System - AC Junction Boxes - K1, K2, K3, and K4 AC Connectors - Replacement of

YES

70-100B

02-08-95

Drive System - Main Gear Box - Tail Takeoff Flange Retaining Nut - Additional Torque Check Requirements - Incorporation of

YES

70-101

04-08-94

Power Plant System - Hover Infrared Suppression System (HIRSS) - Expanded Repair Criteria for Exhaust Extender Assemblies

YES

70-102A

04-21-94

Rotor System - Scissors Attachment Bearing - Revised Radial and Axial Play Limits

YES

70-103

04-20-94

Hydraulic System - 1st Stage Tail Rotor Servo Hydraulic Pressure and Return Hose Assemblies - One-Time Inspection and Replacement of

NO EFFECT

70-104

06-21-94

Rotor System - Bladefold Lockpin Assembly - Inspection for Offset

NO EFFECT

70-105A

05-15-95

Electrical System - RH Relay Panel Assembly - Troubleshooting of Relays

YES

70-106

11-30-93

Shipment of S-70A and S-70C Helicopters by Truck Alternate Method

NO EFFECT

70-107

03-15-94

Flight Controls Systems - Stabilator Actuator Assembly Revised Procedure for Torquing Jamnuts on Clevis Assemblies - Incorporation of

YES

70-108A

11-14-95

Major Components - Required Overhaul and Retirement Schedule

RESCINDED

70-109

11-30-94

Rotor System - Tail Rotor Blade - Blade Boot Support Adhesive Bonds - Inspection, Repair, and Application of Sealing Compound

YES

ASB/CSN-24

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 CUSTOMER SERVICE NOTICES (Cont)

Number

Date

Customer Service Notice

Incorporated

70-110A

04-13-95

Mission Equipment - ESSS Forward Fairing Installations Inspection for Proper Length Attachment Screws

NO EFFECT

70-111

04-12-95

Electrical System - Miscellaneous Relay Panel Assembly One-Time Inspection of

NO EFFECT

70-112

05-31-95

Rotor System - Main Rotor Blades - Revised Inspection/ Repair Limits

YES

70-113

03-15-96

Flight Controls System - Cockpit Flight Controls Trough Extension - One-Time Inspection and Modification of

NO EFFECT

70-114

08-30-95

Airframe System - Main Transmission Support Beam and Upper Deck Skin - Inspection for Cracks

YES

70-115

01-12-96

Mission Equipment - External Stores Support System (ESSS) - Abbreviated Checkout Procedure

YES

70-117

05-28-96

Fuel System - Fuel Selector Valves - Replacement of Packings

YES

70-118

12-17-97

Airframe System - Stabilator Actuator Assembly upper and Lower Clevis Assemblies - One-Time Inspection for Corrosion; Repair of

NO EFFECT

70-119A

09-27-99

Flight Control System - Tail Rotor Rigging - 3° Tail Rotor Bias - Incorporation of

NO EFFECT

70-120

06-10-99

Landing Gear System - Tail Landing Gear Shock Strut Assembly Bearing Retention Pins - Inspection of

NO EFFECT

70-121

05-30-00

Rotor System - Main Rotor Head Bifilar Weights - One-Time Inspection of

NO EFFECT

70-122

02-19-02

Mission Equipment - Cargo - Load Arm - One-Time Magnification 10X Visual Inspection

NO EFFECT

70-123A

04-04-02

Electrical System - Secondary Overhead Light Switch - OneTime Test of

NO EFFECT

70-124

05-12-03

Mission Equipment - Hoists and Winches - Rescue Hoist Assembly - Motor Assembly - Return for Repair

NO EFFECT

Change 7

ASB/CSN-25/(ASB/CSN-26 Blank)

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

VOLUME

1

TABLE OF CONTENTS Page CHAPTER 1

AIRCRAFT GENERAL ......................................................................................

1-1

Section 1-1 1-1-1 1-1-1.1 1-1-1.2 1-1-1.3 1-1-1.4 1-1-1.5 1-1-1.6

GENERAL INFORMATION .............................................................................. GENERAL. .......................................................................................................... Scope. ................................................................................................................... Maintenance Forms, Records, and Reports......................................................... Preparation for Storage or Shipment................................................................... Connection of Electric Connectors...................................................................... Routing and Clamping of Wire Harnesses. ........................................................ Airworthiness of Components. ............................................................................

1-1-1 1-1-1-1 1-1-1-1 1-1-1-1 1-1-1-1 1-1-1-1 1-1-1-1 1-1-1-1

Section 1-2 1-2-1 1-2-1.1 1-2-1.2 1-2-1.3 1-2-1.4 1-2-1.5 1-2-2 1-2-2.1

EQUIPMENT DESCRIPTION AND DATA ..................................................... AIRCRAFT GENERAL. ..................................................................................... Aircraft Description. ............................................................................................ Principal Dimensions. .......................................................................................... Access and Inspection Provisions. ...................................................................... Steps, Handholds, and Walkways/Work Areas................................................... Danger Zones While Rotors are Turning............................................................ FLIGHT SAFETY CRITICAL AIRCRAFT PARTS (FSCAP) PROGRAM. .. Flight Safety Critical Aircraft Parts (FSCAP) Program. ....................................

1-2-1 1-2-1-1 1-2-1-1 1-2-1-4 1-2-1-4 1-2-1-8 1-2-1-8 1-2-2-1 1-2-2-1

Section 1-3 1-3-1 1-3-1.1 1-3-1.2 1-3-2 1-3-2.1 1-3-3 1-3-3.1 1-3-4 1-3-4.1 1-3-4.2 1-3-5 1-3-5.1 1-3-6 1-3-6.1 1-3-7 1-3-7.1

SERVICING......................................................................................................... SERVICING REQUIREMENTS. ...................................................................... Scope. ................................................................................................................... Work Platforms. ................................................................................................... SERVICE MAIN LANDING GEAR SHOCK STRUTS................................... Service Main Landing Gear Shock Struts........................................................... SERVICE MAIN LANDING GEAR TIRES. .................................................... Service Main Landing Gear Tires. ...................................................................... SERVICE TAIL LANDING GEAR SHOCK STRUT. ..................................... Service Tail Landing Gear Shock Strut (with Helicopter on Jacks). ................ Service Tail Landing Gear Shock Strut (with Helicopter on Ground).............. SERVICE TAIL LANDING GEAR TIRE. ........................................................ Service Tail Landing Gear Tire........................................................................... SERVICE/DRAIN ENGINE. .............................................................................. Service/Drain Engine. .......................................................................................... SERVICE ENGINE STARTER. ......................................................................... Service Engine Starter. ........................................................................................

1-3-1 1-3-1-1 1-3-1-1 1-3-1-1 1-3-2-1 1-3-2-2 1-3-3-1 1-3-3-1 1-3-4-1 1-3-4-2 1-3-4-9 1-3-5-1 1-3-5-1 1-3-6-1 1-3-6-1 1-3-7-1 1-3-7-1

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Page 1-3-8 1-3-8.1 1-3-9 1-3-9.1 1-3-10 1-3-10.1 1-3-11 1-3-11.1 1-3-12 1-3-12.1 1-3-12.2 1-3-13 1-3-13.1 1-3-14 1-3-14.1 1-3-15 1-3-15.1 1-3-16 1-3-16.1 1-3-17 1-3-17.1 1-3-18 1-3-18.1 1-3-19 1-3-19.1 1-3-20 1-3-20.1 1-3-21 1-3-21.1 1-3-22 1-3-22.1 1-3-23 1-3-23.1 1-3-24 1-3-24.1 1-3-25 1-3-25.1 1-3-26 1-3-26.1 1-3-26.2 1-3-26.3 1-3-26.4 1-3-27 1-3-27.1 V1-ii

SERVICE HYDRAULIC PUMP MODULES.................................................... Service Hydraulic Pump Modules....................................................................... SERVICE/DRAIN APU. ..................................................................................... Service/Drain APU............................................................................................... SERVICE APU ACCUMULATOR.................................................................... Service APU Accumulator................................................................................... SERVICE WINTERIZATION KIT APU ACCUMULATOR........................... Service Winterization Kit APU Accumulator..................................................... SERVICE/DRAIN MAIN TRANSMISSION..................................................... Service/Drain Main Transmission. ...................................................................... Flush Main Transmission/Change Oil Specification........................................... SERVICE/DRAIN INTERMEDIATE GEAR BOX........................................... Service/Drain Intermediate Gear Box. ................................................................ SERVICE/DRAIN TAIL GEAR BOX. .............................................................. Service/Drain Tail Gear Box. .............................................................................. SERVICE MAIN ROTOR HEAD DAMPER. .................................................. Service Main Rotor Head Damper...................................................................... SERVICE TAIL ROTOR DRIVE SHAFT VISCOUS DAMPER BEARINGS. .................................................................................................................. Service Tail Rotor Drive Shaft Viscous Damper Bearings................................ PRESSURE REFUEL MAIN FUEL CELLS. .................................................... Pressure Refuel Main Fuel Cells......................................................................... GRAVITY REFUEL MAIN FUEL CELLS....................................................... Gravity Refuel Main Fuel Cells. ......................................................................... CLOSED CIRCUIT REFUEL. .......................................................................... Closed Circuit Refuel........................................................................................... PRESSURE DEFUEL MAIN FUEL CELLS..................................................... Pressure Defuel Main Fuel Cells......................................................................... GRAVITY DEFUEL MAIN FUEL CELLS....................................................... Gravity Defuel Main Fuel Cells.......................................................................... TRANSFER DEFUEL EXTENDED RANGE TANKS..................................... Transfer Defuel Extended Range Tanks. ............................................................ PRESERVE MAIN FUEL CELL. ...................................................................... Preserve Main Fuel Cell. ..................................................................................... GRAVITY REFUEL EXTENDED RANGE TANKS. ...................................... Gravity Refuel Extended Range Tanks............................................................... ADAPTER DEFUEL EXTENDED RANGE TANKS....................................... Adapter Defuel Extended Range Tanks.............................................................. CLEAN AND PRESERVE EXTENDED RANGE TANKS. ........................... Clean Extended Range Tanks.............................................................................. Preserve Extended Range Tanks. ........................................................................ Depreserve Extended Range Tanks..................................................................... Store Extended Range Tanks............................................................................... ENVIRONMENTAL CONTROL SYSTEM - SERVICE. ................................ Service/Deservice Environmental Control System. ............................................ Change 10

1-3-8-1 1-3-8-1 1-3-9-1 1-3-9-1 1-3-10-1 1-3-10-1 1-3-11-1 1-3-11-1 1-3-12-1 1-3-12-2 1-3-12-3 1-3-13-1 1-3-13-1 1-3-14-1 1-3-14-1 1-3-15-1 1-3-15-1 1-3-16-1 1-3-16-1 1-3-17-1 1-3-17-1 1-3-18-1 1-3-18-1 1-3-19-1 1-3-19-1 1-3-20-1 1-3-20-1 1-3-21-1 1-3-21-1 1-3-22-1 1-3-22-1 1-3-23-1 1-3-23-1 1-3-24-1 1-3-24-1 1-3-25-1 1-3-25-1 1-3-26-1 1-3-26-1 1-3-26-2 1-3-26-3 1-3-26-3 1-3-27-1 1-3-27-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 1-3-28 1-3-28.1 1-3-29 1-3-29.1 1-3-29.2 1-3-30 1-3-30.1 1-3-31 1-3-31.1

ENVIRONMENTAL CONTROL SYSTEM COMPRESSOR - SERVICE...... Service Environmental Control System Compressor.......................................... SERVICE MAIN ROTOR BLADE BIMt SYSTEM........................................ Service Main Rotor Blade BIMt System. .......................................................... Test BIMt Pressure Indicator. ............................................................................ SERVICE HYDRAULIC RESCUE HOIST....................................................... Service Hydraulic Rescue Hoist.......................................................................... SERVICE ELECTRIC RESCUE HOIST. ......................................................... Service Electric Rescue Hoist. ............................................................................

1-3-28-1 1-3-28-1 1-3-29-1 1-3-29-2 1-3-29-6 1-3-30-1 1-3-30-1 1-3-31-1 1-3-31-1

Section 1-4 1-4-1 1-4-1.1 1-4-1.2 1-4-2 1-4-2.1 1-4-3 1-4-3.1 1-4-4 1-4-4.1 1-4-5 1-4-5.1 1-4-6 1-4-6.1 1-4-6.2 1-4-7 1-4-7.1 1-4-8 1-4-8.1 1-4-9 1-4-9.1 1-4-10 1-4-10.1 1-4-11 1-4-11.1 1-4-12 1-4-12.1 1-4-13 1-4-13.1 1-4-14 1-4-14.1 1-4-15 1-4-15.1 1-4-16

CLEANING.......................................................................................................... CLEANING REQUIREMENTS. ........................................................................ Scope. ................................................................................................................... Work Platforms. ................................................................................................... CLEAN FLIGHT CONTROLS AND HYDRAULIC DECK. ......................... Clean Flight Controls and Hydraulic Deck......................................................... CLEAN HELICOPTER EXTERIOR. ................................................................ Clean Helicopter Exterior. ................................................................................... CLEAN ENGINE. .............................................................................................. Clean Engine. ....................................................................................................... CLEAN MAIN AND TAIL ROTOR BLADES. .............................................. Clean Main and Tail Rotor Blades. .................................................................... CLEAN MAIN ROTOR BLADE PINS. ............................................................ Clean Main Rotor Blade Expandable Pins. ........................................................ Clean Main Rotor Blade Solid Pins.................................................................... CLEAN MAIN ROTOR HEAD. ........................................................................ Clean Main Rotor Head....................................................................................... CLEAN POWERTRAIN. ................................................................................... Clean Powertrain.................................................................................................. CLEAN CARGO HOOK. .................................................................................. Clean Cargo Hook. .............................................................................................. CLEAN MAIN AND TAIL LANDING GEAR. .............................................. Clean Main and Tail Landing Gear. ................................................................... CLEAN TAIL WHEEL LOCKPIN. ................................................................... Clean Tail Wheel Lockpin................................................................................... CLEAN TAIL WHEEL TOW ADAPTERS. .................................................... Clean Tail Wheel Tow Adapters......................................................................... CLEAN CREW CHIEF’S/PASSENGER’S SEATS. ......................................... Clean Crew Chief’s/Passenger’s Seats................................................................ CLEAN MAIN ROTOR DEICE SLIPRING AND BRUSH BLOCK.............. Clean Main Rotor Deice Slipring and Brush Block........................................... CLEAN TAIL ROTOR DEICE SLIPRING. ...................................................... Clean Tail Rotor Deice Slipring.......................................................................... CLEAN EJECTOR RACK, BRU-22A/A. .........................................................

1-4-1 1-4-1-1 1-4-1-1 1-4-1-1 1-4-2-1 1-4-2-1 1-4-3-1 1-4-3-1 1-4-4-1 1-4-4-1 1-4-5-1 1-4-5-1 1-4-6-1 1-4-6-1 1-4-6-1 1-4-7-1 1-4-7-1 1-4-8-1 1-4-8-2 1-4-9-1 1-4-9-1 1-4-10-1 1-4-10-1 1-4-11-1 1-4-11-1 1-4-12-1 1-4-12-1 1-4-13-1 1-4-13-1 1-4-14-1 1-4-14-1 1-4-15-1 1-4-15-1 1-4-16-1

Change 10

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Page 1-4-16.1 1-4-17 1-4-17.1 1-4-18 1-4-18.1 1-4-19 1-4-19.1 1-4-20

1-4-22.1 1-4-23 1-4-23.1 1-4-24 1-4-24.1 1-4-25 1-4-25.1 1-4-25.2 1-4-26 1-4-26.1 1-4-27 1-4-27.1 1-4-28 1-4-28.1 1-4-28.2

Clean Ejector Rack, BRU-22A/A........................................................................ CLEAN WINDSHIELD WIPER PIVOT STUDS. ............................................ Clean Windshield Wiper Pivot Studs.................................................................. CLEAN COCKPIT DOOR WINDOW. ............................................................ Clean Cockpit Door Window. ............................................................................. CLEAN PILOT’S/COPILOT’S SEATS SLIDING BACKFRAME.................. Clean Pilot’s/Copilot’s Seats Sliding Backframe. .............................................. CLEAN SOUNDPROOFING PANELS AND AIRFRAME BEHIND PANELS. .............................................................................................................. Clean Soundproofing Panels................................................................................ Cleaning Mildew from Airframe Behind Soundproofing Panels. ...................... CLEAN CENTRAL DISPLAY UNIT FACEPLATE........................................ Clean Central Display Unit Faceplate................................................................. CLEAN PILOT’S AND COPILOT’S PILOT DISPLAY UNIT FACEPLATE. ..................................................................................................... Clean Pilot’s and Copilot’s Pilot Display Unit Faceplate.................................. CLEAN BLACKOUT CURTAINS. .................................................................. Clean Blackout Curtains. ..................................................................................... CLEAN EXTERIOR SURFACE OF EXTERNAL FUEL TANK.................... Clean Exterior Surface of External Fuel Tank. .................................................. CLEAN HYDRAULIC RESCUE HOIST. ........................................................ Clean Hydraulic Rescue Hoist............................................................................. Clean Hydraulic Rescue Hoist Cable.................................................................. CLEAN FLIR SYSTEM. ................................................................................... Clean FLIR System.............................................................................................. CLEAN APU ENGINE AIR PARTICLE SEPARATOR (EAPS). .................. Clean APU Engine Air Particle Separator.......................................................... CLEAN ELECTRIC RESCUE HOIST............................................................... Clean Electric Rescue Hoist. ............................................................................... Clean Electric Rescue Hoist Cable. ....................................................................

1-4-22-1 1-4-22-1 1-4-23-1 1-4-23-1 1-4-24-1 1-4-24-1 1-4-25-1 1-4-25-1 1-4-25-1 1-4-26-1 1-4-26-1 1-4-27-1 1-4-27-1 1-4-28-1 1-4-28-1 1-4-28-2

Section 1-5 1-5-1 1-5-1.1 1-5-1.2 1-5-2 1-5-2.1 1-5-3 1-5-3.1 1-5-4 1-5-4.1 1-5-5 1-5-5.1 1-5-6 1-5-6.1

LUBRICATION ................................................................................................... LUBRICATION REQUIREMENTS................................................................... Scope. ................................................................................................................... Work Platforms. ................................................................................................... LUBRICATE BIFILAR....................................................................................... Lubricate Bifilar. .................................................................................................. LUBRICATE SWASHPLATE............................................................................ Lubricate Swashplate. .......................................................................................... LUBRICATE MIXER BELLCRANKS.............................................................. Lubricate Mixer Bellcranks. ................................................................................ LUBRICATE ROTARY INPUTS....................................................................... Lubricate Rotary Inputs. ...................................................................................... LUBRICATE LANDING GEAR SHOCK STRUTS......................................... Lubricate Landing Gear Shock Struts. ................................................................

1-5-1 1-5-1-1 1-5-1-1 1-5-1-1 1-5-2-1 1-5-2-1 1-5-3-1 1-5-3-1 1-5-4-1 1-5-4-1 1-5-5-1 1-5-5-1 1-5-6-1 1-5-6-1

1-4-20.1 1-4-20.2 1-4-21 1-4-21.1 1-4-22

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1-4-16-1 1-4-17-1 1-4-17-1 1-4-18-1 1-4-18-1 1-4-19-1 1-4-19-1 1-4-20-1 1-4-20-1 1-4-20-1 1-4-21-1 1-4-21-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 1-5-7 1-5-7.1 1-5-8 1-5-8.1 1-5-9 1-5-9.1 1-5-10 1-5-10.1 1-5-11 1-5-11.1 1-5-12 1-5-12.1 1-5-13 1-5-13.1

LUBRICATE STABILATOR ACTUATOR ASSEMBLY................................ Lubricate Stabilator Actuator Assembly. ........................................................... LUBRICATE WINDSHIELD WIPER PIVOT STUDS. ................................... Lubricate Windshield Wiper Pivot Studs............................................................ LUBRICATE WINDSHIELD WIPER CONVERTER. ..................................... Lubricate Windshield Wiper Converter. ............................................................. LUBRICATE TAIL WHEEL LOCKPIN. .......................................................... Lubricate Tail Wheel Lockpin............................................................................. LUBRICATE TAIL WHEEL BEARINGS......................................................... Lubricate Tail Wheel Bearings............................................................................ LUBRICATE DOOR LOCKS............................................................................. Lubricate Door Locks. ......................................................................................... LUBRICATE EJECTOR RACK, BRU-22A/A. ................................................. Lubricate Ejector Rack, BRU-22A/A..................................................................

1-5-7-1 1-5-7-1 1-5-8-1 1-5-8-1 1-5-9-1 1-5-9-1 1-5-10-1 1-5-10-1 1-5-11-1 1-5-11-1 1-5-12-1 1-5-12-1 1-5-13-1 1-5-13-1

Section 1-6 1-6-1 1-6-1.1 1-6-2 1-6-2.1 1-6-3 1-6-3.1 1-6-3.2 1-6-3.3 1-6-4 1-6-4.1 1-6-5 1-6-5.1 1-6-6 1-6-6.1 1-6-7 1-6-7.1 1-6-8 1-6-8.1 1-6-9 1-6-9.1 1-6-10 1-6-10.1 1-6-11 1-6-11.1 1-6-12 1-6-12.1 1-6-13 1-6-13.1

GROUND HANDLING....................................................................................... GROUND HANDLING GENERAL................................................................... Scope. ................................................................................................................... TOW HELICOPTER. .......................................................................................... Tow Helicopter..................................................................................................... JACK HELICOPTER. ......................................................................................... Jack Main Landing Gear. .................................................................................... Jack Tail Landing Gear. ...................................................................................... Jack Entire Helicopter.......................................................................................... TIE DOWN AND MOOR HELICOPTER. ........................................................ Tie Down and Moor Helicopter. ......................................................................... PROTECTIVE COVERS. ................................................................................... Protective Covers. ................................................................................................ PARK HELICOPTER.......................................................................................... Park Helicopter..................................................................................................... FOLD/SPREAD MAIN ROTOR BLADES. ...................................................... Fold/Spread Main Rotor Blades. ......................................................................... FOLD/SPREAD TAIL ROTOR BLADES. ........................................................ Fold/Spread Tail Rotor Blades. ........................................................................... FOLD/UNFOLD TAIL ROTOR PYLON. ......................................................... Fold/Unfold Tail Rotor Pylon. ............................................................................ KNEEL HELICOPTER. ...................................................................................... Kneel Helicopter. ................................................................................................. CABIN TIEDOWN FITTINGS........................................................................... Replace Cabin Tiedown Fittings. ........................................................................ TIEDOWN PLATES. .......................................................................................... Replace Tiedown Plates....................................................................................... TAIL CONE TOW FITTINGS. .......................................................................... Install/Remove Tail Cone Tow Fittings..............................................................

1-6-1 1-6-1-1 1-6-1-1 1-6-2-1 1-6-2-1 1-6-3-1 1-6-3-1 1-6-3-5 1-6-3-5 1-6-4-1 1-6-4-2 1-6-5-1 1-6-5-2 1-6-6-1 1-6-6-1 1-6-7-1 1-6-7-2 1-6-8-1 1-6-8-1 1-6-9-1 1-6-9-2 1-6-10-1 1-6-10-1 1-6-11-1 1-6-11-1 1-6-12-1 1-6-12-1 1-6-13-1 1-6-13-1

Change 10

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Page 1-6-14 1-6-14.1 1-6-15 1-6-15.1 1-6-15.2 1-6-16 1-6-16.1 1-6-16.2 1-6-17 1-6-17.1 1-6-18 1-6-18.1 1-6-18.2

FUSELAGE AND TAIL CONE TIEDOWN RINGS........................................ Replace Fuselage and Tail Cone Tiedown Rings............................................... APPLY HYDRAULIC POWER. ........................................................................ External Hydraulic Power.................................................................................... Internal Hydraulic Power..................................................................................... APPLY ELECTRICAL POWER. ...................................................................... External Electrical Power. ................................................................................... Internal Electrical Power. .................................................................................... HYDRAULIC CART CONNECT AND CHECKOUT. .................................... Connect and Check Out Hydraulic Cart. ............................................................ ENGAGE/DISENGAGE GUST LOCK AND ROTOR BRAKE...................... Gust Lock. ............................................................................................................ Rotor Brake. .........................................................................................................

1-6-14-1 1-6-14-1 1-6-15-1 1-6-15-1 1-6-15-4 1-6-16-1 1-6-16-1 1-6-16-2 1-6-17-1 1-6-17-1 1-6-18-1 1-6-18-1 1-6-18-1

Section 1-7 1-7-1 1-7-1.1 1-7-1.2 1-7-1.3 1-7-1.4 1-7-1.5 1-7-1.6 1-7-2 1-7-2.1 1-7-2.2 1-7-3

PERIODIC/SPECIAL INSPECTIONS ............................................................... SPECIAL INSPECTION REQUIREMENTS. .................................................... Scope. ................................................................................................................... Special Inspection Description. ........................................................................... Inspection Requirements...................................................................................... Standards of Serviceability. ................................................................................. Scheduling. ........................................................................................................... Work Platforms. ................................................................................................... ENGINE OUTPUT SHAFT INSPECTION. ...................................................... Engine Output Shaft Inspection - 1 to 3 Hours 70361-08004-042, -043. ......... Engine Output Shaft Inspection - 3 to 13 Hours, 70361-08014-041................. GEAR BOXES, MOUNTING BOLTS TORQUE CHECK - 9 TO 11 HOURS. ............................................................................................................... Main Transmission............................................................................................... Intermediate Gear Box......................................................................................... Tail Gear Box....................................................................................................... MAIN ROTOR BLADE TIP CAP SCREWS - 9 TO 11 HOURS. .................. Main Rotor Blade Tip Cap Screws - 9 to 11 Hours. ......................................... MAIN ROTOR HEAD TORQUE CHECK - 9 TO 11 HOURS....................... General. ................................................................................................................ Hub-to-Shaft Extension Bolts.............................................................................. Hub-to-Shaft Expandable Pins............................................................................. Pressure Plate Bolts. ............................................................................................ Spindle-to-Horn Attachment Bolts. ..................................................................... Damper Attachment Nuts Retorque. ................................................................... Main Rotor Head Shaft Bolts.............................................................................. Spindle Attachment Bolts Retorque. ................................................................... Pitch Control Rod Locknuts Retorque. ............................................................... SPINDLE SLEEVE BEARING INSPECTION - 9 TO 11 HOURS................. Inspect Spindle Sleeve Bearing - 9 to 11 Hours. ...............................................

1-7-1 1-7-1-1 1-7-1-1 1-7-1-1 1-7-1-1 1-7-1-1 1-7-1-1 1-7-1-2 1-7-2-1 1-7-2-1 1-7-2-3

1-7-3.1 1-7-3.2 1-7-3.3 1-7-4 1-7-4.1 1-7-5 1-7-5.1 1-7-5.2 1-7-5.3 1-7-5.4 1-7-5.5 1-7-5.6 1-7-5.7 1-7-5.8 1-7-5.9 1-7-6 1-7-6.1

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1-7-3-1 1-7-3-1 1-7-3-2 1-7-3-2 1-7-4-1 1-7-4-1 1-7-5-1 1-7-5-2 1-7-5-2 1-7-5-4 1-7-5-4 1-7-5-5 1-7-5-6 1-7-5-6 1-7-5-7 1-7-5-7 1-7-6-1 1-7-6-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 1-7-7 1-7-7.1 1-7-7.2 1-7-8 1-7-8.1 1-7-9 1-7-9.1 1-7-10 1-7-10.1 1-7-11 1-7-11.1 1-7-11.2 1-7-11.3 1-7-11.4 1-7-11.5 1-7-11.6 1-7-11.7 1-7-11.8 1-7-11.9 1-7-11.10 1-7-11.11 1-7-12 1-7-12.1 1-7-12.2 1-7-12.3 1-7-13 1-7-13.1 1-7-13.2 1-7-14 1-7-14.1 1-7-14.2 1-7-14.3 1-7-14.4 1-7-14.5 1-7-14.6 1-7-14.7 1-7-14.8 1-7-14.9 1-7-14.10 1-7-14.11 1-7-14.12 1-7-14.13

OUTBOARD RETENTION PLATE NUTS AND TAIL ROTOR PITCH BEAM RETAINING NUT TORQUE CHECK - 9 TO 11 HOURS. .............. Outboard Retention Plate Nuts Retorque - 9 to 11 Hours. ................................ Tail Rotor Pitch Beam Retaining Nut Torque Check - 9 to 11 Hours. ............ TAIL ROTOR DRIVE SHAFT TORQUE CHECK - 9 TO 11 HOURS. ....... Tail Rotor Drive Shaft Torque Check - 9 to 11 Hours...................................... TAIL GEAR BOX INBOARD RETENTION PLATE TORQUE CHECK 9 TO 11 HOURS. ............................................................................................... Tail Gear Box Inboard Retention Plate Torque Check - 9 to 11 Hours. .......... TAIL ROTOR CABLE TENSION CHECK - 9 TO 11 HOURS. .................... Tail Rotor Cable Tension Check - 9 to 11 Hours.............................................. EVERY 30 HOURS. ........................................................................................... Bifilar Weights. .................................................................................................... Horizontal Stores Support (HSS) Pneumatic Check Valve................................ Main Rotor Head Dampers.................................................................................. Main Rotor Pitch Control Rod Spherical Bearings. ........................................... Rotating Scissors.................................................................................................. Spindle Elastomeric Bearing Assembly. ............................................................. Stabilator Hinge Fitting Torque Check. .............................................................. Tail Rotor Pitch Control Rods with Spherical Bearings. ................................... Tail Rotor Pylon-to-Tail Cone Bolts Torque Check. ......................................... Transition Section-to-Tail Cone Bolt Torque Check.......................................... Oil Cooler............................................................................................................. EVERY 50 HOURS. ........................................................................................... Aircraft Battery. ................................................................................................... Deswirl Duct Clamp. ........................................................................................... Main Gear Box Planetary Carrier Assembly. ..................................................... EVERY 60 HOURS. ........................................................................................... Tail Rotor Blade Horn Assembly........................................................................ Swashplate Links. ................................................................................................ EVERY 100 HOURS. ......................................................................................... Engine Output Shaft, Input Module Input Flange, Elastomeric Gimbal, and Adjacent Components Inspection. ....................................................................... Following First External Lift Mission Exceeding 8000 Pounds........................ Intermediate Gear Box Chip Detector/Temperature Sensor............................... Main Module Sump Chip Detector/Temperature Sensor. .................................. Main Transmission Support Beams and Upper Deck Skin................................ Oil Cooler............................................................................................................. Tail Gear Box Chip Detector/Temperature Sensor............................................. Tail Rotor Pitch Horn Fairing. ............................................................................ Aircraft Battery. ................................................................................................... Rotor Brake. ......................................................................................................... Accessory Module Oil Return Screen................................................................. Rescue Hoist. ....................................................................................................... Main Rotor Pitch Control Rods...........................................................................

Change 10

1-7-7-1 1-7-7-1 1-7-7-1 1-7-8-1 1-7-8-1 1-7-9-1 1-7-9-2 1-7-10-1 1-7-10-1 1-7-11-1 1-7-11-2 1-7-11-2 1-7-11-2 1-7-11-4 1-7-11-4 1-7-11-4 1-7-11-4 1-7-11-5 1-7-11-5 1-7-11-6 1-7-11-6 1-7-12-1 1-7-12-1 1-7-12-1 1-7-12-2 1-7-13-1 1-7-13-1 1-7-13-1 1-7-14-1 1-7-14-2 1-7-14-4 1-7-14-4 1-7-14-4 1-7-14-4 1-7-14-4 1-7-14-4 1-7-14-4 1-7-14-5 1-7-14-5 1-7-14-6 1-7-14-6 1-7-14-6

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 1-7-15 1-7-15.1 1-7-15.2 1-7-16 1-7-16.1 1-7-17 1-7-17.1 1-7-17.2 1-7-17.3 1-7-18 1-7-18.1 1-7-18.2 1-7-18.3 1-7-18.4 1-7-18.5 1-7-18.6 1-7-19 1-7-19.1 1-7-20 1-7-20.1 1-7-20.2 1-7-20.3 1-7-20.4 1-7-20.5 1-7-20.6 1-7-21 1-7-21.1 1-7-21.2 1-7-22 1-7-22.1 1-7-22.2 1-7-22.3 1-7-22.4 1-7-23 1-7-23.1 1-7-23.2 1-7-23.3 1-7-23.4 1-7-23.5 1-7-23.6 1-7-23.7 1-7-24 1-7-24.1 1-7-25

V1-viii

EVERY 150 HOURS. ......................................................................................... Tail Rotor Drive Shaft Section I Flexible Couplings......................................... Cargo Door Upper Track Installation. ................................................................ EVERY 250 HOURS. ......................................................................................... Inspect Stabilator.................................................................................................. EVERY 1000 HOURS. ....................................................................................... Cabin Tub Inspection........................................................................................... Flight Control Rods. ............................................................................................ Transition Section Tub Inspection....................................................................... BEFORE FIRST FLIGHT OF DAY................................................................... Inspect Collective and Yaw Boost Servos.......................................................... Inspect Stabilator Assembly. ............................................................................... Inspect Main Rotor Spindle Blade Attachment Lugs......................................... Inspect Main Landing Gear Drag Beam. ............................................................ Inspect Pitch Control Rods.................................................................................. Inspect ESSS External 230 Gallon Fuel Tank Stabilizer Fin. ........................... EVERY 30 DAYS. .............................................................................................. Inspect Forward Looking Infrared Radar (FLIR). .............................................. EVERY 90 DAYS. .............................................................................................. General. ................................................................................................................ Inspect - Every 90 Days. ..................................................................................... Clean Buildup of Corrosion Preventive Compound. .......................................... Clean - Corrosion Removal Procedures.............................................................. Treat Electrical/Coaxial Connectors.................................................................... Inspect Main Transmission Forward Bridge Drain Hole. .................................. EVERY 120 DAYS. ............................................................................................ Inspect Ejector Rack, BRU-22A/A. .................................................................... Inspect Rescue Hoist Spring Pin. ........................................................................ EVERY 6 MONTHS. .......................................................................................... Main Rotor Blade. ............................................................................................... Ground Receptacle. .............................................................................................. Portable Fire Extinguishers.................................................................................. Overload Clutch Margin Validation Load Check HOIST, 42315−10 .................. EVERY 12 MONTHS. ........................................................................................ Compass Indicators. ............................................................................................. Pitot-Static System Inspection. ............................................................................ Free-Air Thermometer (FAT) Inspection............................................................ Primary Servo Inspection..................................................................................... Pivot Bolts Inspection.......................................................................................... Engine Cowling Inspection.................................................................................. Main Rotor Blade Skin-to-Core Inspection. ....................................................... AFTER DUAL-ENGINE OPERATION WITH GUST LOCK ENGAGED. ... After Dual-Engine Operation with Gust Lock Engaged. ................................... AFTER EXCEEDING 145 KIAS WITH CABIN DOORS OPENED..............

Change 10

1-7-15-1 1-7-15-1 1-7-15-1 1-7-16-1 1-7-16-1 1-7-17-1 1-7-17-1 1-7-17-2 1-7-17-3 1-7-18-1 1-7-18-1 1-7-18-2 1-7-18-2 1-7-18-2 1-7-18-2 1-7-18-2 1-7-19-1 1-7-19-1 1-7-20-1 1-7-20-2 1-7-20-2 1-7-20-6 1-7-20-6 1-7-20-8 1-7-20-9 1-7-21-1 1-7-21-1 1-7-21-1 1-7-22-1 1-7-22-1 1-7-22-1 1-7-22-2 1-7-22-2 1-7-23-1 1-7-23-2 1-7-23-2 1-7-23-2 1-7-23-2 1-7-23-2 1-7-23-5 1-7-23-5 1-7-24-1 1-7-24-1 1-7-25-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 1-7-25.1 1-7-26 1-7-26.1 1-7-27 1-7-27.1 1-7-28 1-7-28.1 1-7-29 1-7-29.1 1-7-30 1-7-31 1-7-31.1 1-7-32 1-7-32.1 1-7-33 1-7-33.1 1-7-34 1-7-34.1 1-7-35 1-7-35.1 1-7-36 1-7-36.1 1-7-37 1-7-37.1 1-7-38 1-7-38.1 1-7-39 1-7-39.1 1-7-40 1-7-40.1 1-7-41 1-7-41.1 1-7-41.2 1-7-41.3 1-7-41.4 1-7-41.5

After Exceeding 145 KIAS with Cabin Doors Opened. .................................... AFTER FIRE EXTINGUISHING SYSTEM DISCHARGE (HALONTYPE)................................................................................................................... After Fire Extinguishing System Discharge (Halon-Type). ............................... AFTER FIRING CHAFF DISPENSER.............................................................. After Firing Chaff Dispenser. .............................................................................. AFTER FIRING EJECTOR RACK, BRU-22A/A. ............................................ After Firing Ejector Rack, BRU-22A/A. ............................................................ AFTER ENGINE OUTPUT SHAFT MAINTENANCE. .................................. After Engine Output Shaft Maintenance............................................................. DELETED. ........................................................................................................... AFTER MAIN ROTOR BLADE CONTACT WITH TAIL ROTOR PYLON OR TAIL CONE.................................................................................................. After Main Rotor Blade Contact with Tail Rotor Pylon or Tail Cone. ............ AFTER MAIN ROTOR BLADE CONTACT WITH IR JAMMER, ALQ144. ....................................................................................................................... After Main Rotor Blade Contact with IR Jammer, ALQ-144. .......................... AFTER OPERATING TRANSMISSION AT HIGH TEMPERATURE OR LOW/NO OIL PRESSURE. ................................................................................ After Operating Transmission at High Temperature or Low/No Oil Pressure. ...................................................................................................................... AFTER SINGLE-ENGINE OPERATION ABOVE IDLE WITH GUST LOCK ENGAGED............................................................................................... After Single-Engine Operation Above Idle with Gust Lock Engaged. ............. BEFORE LOADING STORES - INSPECT EJECTOR RACK, BRU-22A/ A. .......................................................................................................................... Before Loading Stores - Inspect Ejector Rack, BRU-22A/A. ........................... BEFORE EVERY FLIGHT - INSPECT HYDRAULIC SYSTEM COMPONENTS. .................................................................................................. Inspect Hydraulic System Components............................................................... ENGINE OUTPUT SHAFT INSPECTION - AFTER DISCONNECT. ........... Engine Output Shaft Inspection - After Disconnect........................................... ENGINE WHINE/HIGH FREQUENCY VIBRATION INSPECTION. ........... Engine Whine/High Frequency Vibration Inspection......................................... HARD LANDING. .............................................................................................. Hard Landing. ...................................................................................................... HELICOPTER SUBJECT TO EXCESSIVE SPIN RATE. ............................... Helicopter Subject to Excessive Spin Rate......................................................... HELICOPTER SUBJECT TO SALT WATER IMMERSION OR DRY CHEMICAL AND FOAM-TYPE FIRE EXTINGUISHING AGENTS. .......... General. ................................................................................................................ Salt Water Immersion - Primary Method. .......................................................... Salt Water Immersion - Alternate Method. ........................................................ Dry Chemical Fire Extinguishing Agents. .......................................................... Foam-Type Fire Extinguishing Agents. ..............................................................

Change 10

1-7-25-1 1-7-26-1 1-7-26-1 1-7-27-1 1-7-27-1 1-7-28-1 1-7-28-1 1-7-29-1 1-7-29-1 1-7-30-1 1-7-31-1 1-7-31-1 1-7-32-1 1-7-32-1 1-7-33-1 1-7-33-1 1-7-34-1 1-7-34-1 1-7-35-1 1-7-35-1 1-7-36-1 1-7-36-1 1-7-37-1 1-7-37-1 1-7-38-1 1-7-38-1 1-7-39-1 1-7-39-2 1-7-40-1 1-7-40-1 1-7-41-1 1-7-41-2 1-7-41-3 1-7-41-5 1-7-41-5 1-7-41-7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

V1-ix

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 1-7-41.6 1-7-42 1-7-42.1 1-7-43 1-7-43.1 1-7-44 1-7-44.1 1-7-45 1-7-45.1 1-7-46 1-7-46.1 1-7-47 1-7-47.1 1-7-47.2 1-7-47.3 1-7-47.4 1-7-47.5 1-7-47.6 1-7-47.7 1-7-47.8 1-7-47.9 1-7-47.10 1-7-47.11 1-7-47.12 1-7-47.13 1-7-47.14 1-7-48 1-7-48.1 1-7-48.2 1-7-48.3 1-7-48.4 1-7-49 1-7-49.1 1-7-49.2 1-7-50 1-7-50.1 1-7-50.2 1-7-51 1-7-51.1 1-7-52 1-7-52.1 1-7-52.2 1-7-52.3 1-7-52.4 V1-x

Main Transmission or Gear Boxes Internal Surfaces Contaminated with Salt Water or Fire Extinguishing Agents. .................................................................. MAIN ROTOR BLADES DROPPED DURING BLADE FOLD..................... Main Rotor Blades Dropped During Blade Fold................................................ MAIN ROTOR BLADES SUBJECT TO HIGH WINDS. ................................ Main Rotor Blades Subject to High Winds. ....................................................... MAIN ROTOR DROOP STOP POUNDING. ................................................... Main Rotor Droop Stop Pounding. ..................................................................... OPERATING HELICOPTER IN EROSIVE CONDITIONS. ........................... Erosive Conditions. .............................................................................................. OPERATING HELICOPTER IN HEAVY RAINFALL 70583−702374 .......... Operating Helicopter in Heavy Rainfall. ............................................................ POST LIGHTNING STRIKE INSPECTION. .................................................... Preliminary Inspection. ........................................................................................ Main Rotor and Flight Controls. ......................................................................... Main Transmission and Tail Rotor Drive Shaft. ................................................ Tail Rotor System. ............................................................................................... Main Landing Gear.............................................................................................. Tail Landing Gear................................................................................................ Tail Rotor Pylon. ................................................................................................. Intermediate Gear Box, Tail Gear Box, and Tail Rotor Drive Shaft. ............... Oil Cooler............................................................................................................. Engine................................................................................................................... APU. ..................................................................................................................... Electrical/Avionics. .............................................................................................. Fuel System.......................................................................................................... External Fuel Tank............................................................................................... HYDRAULIC RESCUE HOIST INSPECTION. ............................................... Before Each Rescue Hoist Mission..................................................................... After Each Rescue Hoist Mission Use................................................................ Hoist Overload. .................................................................................................... After Every 300 Cycles or 400 Lifts HOIST, 42315−10 . .................................... ROTOR BRAKE INSPECTION. ........................................................................ Rotor Brake Slippage on Start-Up. ..................................................................... Rotor Brake Nut Torque Stabilization Check..................................................... SUDDEN STOPPAGE. ....................................................................................... Main Rotor Blades. .............................................................................................. Tail Rotor Blades. ................................................................................................ TAIL ROTOR OUT OF BALANCE - LOSS OF MATERIAL........................ Tail Rotor Out of Balance - Loss of Material.................................................... TRANSMISSION SYSTEM - OVERSPEED. ................................................... Up to 126% Nr..................................................................................................... Between 127% to 136% Nr................................................................................. Between 137% to 141% Nr................................................................................. Above 141% Nr. .................................................................................................. Change 10

1-7-41-8 1-7-42-1 1-7-42-1 1-7-43-1 1-7-43-1 1-7-44-1 1-7-44-1 1-7-45-1 1-7-45-1 1-7-46-1 1-7-46-1 1-7-47-1 1-7-47-3 1-7-47-4 1-7-47-5 1-7-47-5 1-7-47-6 1-7-47-6 1-7-47-6 1-7-47-7 1-7-47-7 1-7-47-7 1-7-47-7 1-7-47-7 1-7-47-8 1-7-47-8 1-7-48-1 1-7-48-1 1-7-48-2 1-7-48-4 1-7-48-4 1-7-49-1 1-7-49-1 1-7-49-1 1-7-50-1 1-7-50-1 1-7-50-2 1-7-51-1 1-7-51-1 1-7-52-1 1-7-52-1 1-7-52-1 1-7-52-2 1-7-52-2

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 1-7-53 1-7-53.1 1-7-54 1-7-54.1 1-7-55 1-7-55.1 1-7-55.2 1-7-55.3 1-7-55.4 1-7-56 1-7-56.1 1-7-56.2 1-7-56.3 1-7-57 1-7-57.1 1-7-58 1-7-58.1 1-7-58.2 1-7-59 1-7-59.1 1-7-60 1-7-60.1 1-7-60.2 1-7-60.3 1-7-60.4 1-7-61 1-7-61.1 1-7-61.2 1-7-62 1-7-62.1

Section 1-8 1-8-1 1-8-1.1 1-8-1.2 1-8-2

TRANSMISSION SYSTEM - OVERTEMPERATURE S70−I ....................... Transmission System - Overtemperature. ........................................................... TRANSMISSION SYSTEM - OVERTEMPERATURE S70−II ...................... Transmission System - Overtemperature. ........................................................... TRANSMISSION SYSTEM - OVERTORQUE S70−I .................................... Between 107% - 127%, More Than 10 Seconds, Both Engines Operating...... Between 121% - 127%, More Than 10 Seconds, One Engine Operating......... Between 127% - 144%, More Than 10 Seconds, One or Both Engines Operating. ............................................................................................................. Above 144%, One or Both Engines Operating. ................................................. TRANSMISSION SYSTEM - OVERTORQUE S70−II ................................... 121% to 150%, More Than 10 Seconds, Both Engines Operating. .................. 135% to 150%, More Than 10 Seconds, One Engine Operating. ..................... 150%, One or Both Engines Operating. ............................................................. AFTER TAIL ROTOR BLADE REMOVAL. ................................................... Tail Rotor Boot Support Inspection. ................................................................... ELECTRIC RESCUE HOIST INSPECTIONS HOIST BL−29900−30 ............... Before Each Mission Use. ................................................................................... Inspection and Maintenance. ............................................................................... EVERY 60 MONTHS. ........................................................................................ Inspect Fire Extinguishing System Agent Container.......................................... EVERY 500 HOURS. ......................................................................................... Pitch Control Rod Locknut Torque Check. ........................................................ Tail Gear Box Output Bevel Gear Ultrasonic Inspection. ................................. ESSS External 230 Gallon Fuel Tank Stabilizer Fin Inspection. ...................... Pilot’s/Copilot’s Seat Trunnion Torque Stripe Inspection. ................................ EVERY 120 HOURS. ......................................................................................... Damper Attachment Torque Check..................................................................... External Rescue Hoist Fitting Inspection............................................................ SEVERE OR SUDDEN ONSET OF LOW-FREQUENCY MAIN ROTOR VIBRATION OR OUT-OF-TRACK CONDITION........................................... Severe or Sudden Onset of Low-Frequency Main Rotor Vibration or Out-ofTrack Condition Inspection. ................................................................................ RETIREMENT SCHEDULE .............................................................................. CALENDAR RETIREMENT.............................................................................. Retirement Schedule. ........................................................................................... Retirement Schedule Definition........................................................................... LIFE LIMITED COMPONENTS. ......................................................................

Change 10

1-7-53-1 1-7-53-1 1-7-54-1 1-7-54-1 1-7-55-1 1-7-55-1 1-7-55-1 1-7-55-1 1-7-55-2 1-7-56-1 1-7-56-1 1-7-56-1 1-7-56-2 1-7-57-1 1-7-57-1 1-7-58-1 1-7-58-2 1-7-58-3 1-7-59-1 1-7-59-1 1-7-60-1 1-7-60-2 1-7-60-2 1-7-60-13 1-7-60-13 1-7-61-1 1-7-61-1 1-7-61-2 1-7-62-1 1-7-62-1 1-8-1 1-8-1-1 1-8-1-1 1-8-1-1 1-8-2-1

V1-xi/(V1-xii Blank)

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

VOLUME

2

TABLE OF CONTENTS Page CHAPTER 2

AIRFRAME .........................................................................................................

2-1

Section 2-1 2-1-1 2-1-1.1 2-1-1.2 2-1-1.3 2-1-1.4 2-1-1.5 2-1-1.6 2-1-1.7 2-1-1.8 2-1-1.9 2-1-1.10

EQUIPMENT DESCRIPTION AND DATA ..................................................... AIRFRAME DESCRIPTION AND DATA........................................................ Airframe Overview. ............................................................................................. Cockpit. ................................................................................................................ Cabin. ................................................................................................................... Transition Section. ............................................................................................... Tail Cone.............................................................................................................. Tail Rotor Pylon. ................................................................................................. Main Rotor Pylon. ............................................................................................... Wire Strike Protection System WSPS ........................................................... Vibration Absorbers. ............................................................................................ Fast Rope..............................................................................................................

2-1-1 2-1-1-1 2-1-1-1 2-1-1-1 2-1-1-2 2-1-1-2 2-1-1-3 2-1-1-3 2-1-1-4 2-1-1-4 2-1-1-4 2-1-1-5

Section 2-2 2-2-1

TROUBLESHOOTING ....................................................................................... POSITION TRANSMITTER/LIMIT SWITCH ASSEMBLY (BENCH). ........

2-2-1 2-2-1-1

Section 2-3 2-3-1 2-3-1.1 2-3-1.2 2-3-2 2-3-2.1 2-3-3 2-3-3.1 2-3-3.2 2-3-3.3 2-3-3.4 2-3-3.5 2-3-4 2-3-4.1 2-3-4.2 2-3-4.3 2-3-4.4 2-3-5 2-3-5.1 2-3-5.2

ON AIRCRAFT INSPECTIONS ........................................................................ CORROSION INSPECTIONS. ........................................................................... Nose Door Latch Corrosion Inspection............................................................... Cockpit Door Corrosion Inspection..................................................................... COCKPIT DOORS INSPECTION. .................................................................... Cockpit Doors Jettison Inspection....................................................................... WINDOW AND WINDSHIELD INSPECTIONS. ............................................ Upper Window Inspection. .................................................................................. Lower Window Inspection................................................................................... Outboard Windshield Inspection. ........................................................................ Plastic Center Windshield Inspection W/O HCW . .......................................... Glass Center Windshield Inspection HCW ..................................................... PILOT’S/COPILOT’S SEAT INSPECTIONS. .................................................. Pilot’s/Copilot’s Seat - Shoulder Harness Inspection......................................... Pilot’s/Copilot’s Seat - Lap Belt Inspection. ...................................................... Pilot’s/Copilot’s Seat - Crotch Belt, Buckle, and Pad Inspection. .................... Pilot’s/Copilot’s Seat - Trunnion Torque Stripe Inspection............................... CREW CHIEF’S/PASSENGER’S SEAT INSPECTIONS. ............................... Passenger’s Seat Restraint System Inspection. ................................................... Crew Chief’s Seat Restraint System Inspection. ................................................

2-3-1 2-3-1-1 2-3-1-1 2-3-1-1 2-3-2-1 2-3-2-1 2-3-3-1 2-3-3-1 2-3-3-2 2-3-3-2 2-3-3-3 2-3-3-3 2-3-4-1 2-3-4-1 2-3-4-2 2-3-4-3 2-3-4-4 2-3-5-1 2-3-5-1 2-3-5-2

Change 10 This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

V2-i

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-3-5.3 2-3-6 2-3-6.1 2-3-6.2 2-3-7 2-3-7.1 2-3-7.2 2-3-8 2-3-8.1 2-3-9 2-3-9.1 2-3-10 2-3-10.1 2-3-10.2 2-3-10.3 2-3-11 2-3-11.1 2-3-12 2-3-12.1 2-3-13 2-3-13.1 2-3-14 2-3-14.1 2-3-14.2 2-3-15 2-3-15.1 2-3-15.2 2-3-15.3 2-3-15.4 2-3-15.5 2-3-15.6 2-3-15.7 2-3-15.8 2-3-15.9 2-3-15.10 2-3-15.11 2-3-15.12 2-3-15.13

Passenger’s Seat Cable Inspection. ..................................................................... CREW CHIEF’S WINDOW INSPECTIONS. ................................................... Crew Chief’s Window Lower Track Inspection................................................. Crew Chief’s Window Upper Track Inspection. ................................................ CABIN DOOR INSPECTIONS. ......................................................................... Cabin Door Lower Track Inspection................................................................... Cabin Door Window Jettison Inspection. ........................................................... CABIN FLOOR INSPECTIONS. ....................................................................... Tiedown Rings and Floor Pans Inspections........................................................ WIRE STRIKE PROTECTION SYSTEM INSPECTIONS. ............................. Wire Strike Protection System Inspection. ......................................................... MAIN ROTOR PYLON INSPECTIONS. .......................................................... Main Rotor Pylon Sliding Cover Inspection....................................................... APU Access Doors Inspection. ........................................................................... Oil Cooler Compartment Access Doors Inspection............................................ ENGINE COWLINGS INSPECTION. ............................................................... Engine Cowling Latches Inspection.................................................................... TRANSITION SECTION INSPECTIONS. ........................................................ Torque Check Transition Section-to-Tail Cone Bolts. ....................................... TAIL ROTOR DRIVE SHAFT COVERS INSPECTION................................. Turnlock Fastener and Hinge Inspection. ........................................................... TAIL ROTOR PYLON INSPECTIONS............................................................. Tail Gear Box Fitting Inspection......................................................................... Tail Rotor Pylon Lower Step Inspection. ........................................................... STABILATOR INSPECTIONS. ......................................................................... Tail Rotor Pylon Stabilator Actuator Attachment Fitting Bearing Inspection. . Stabilator Spar Inspection.................................................................................... Stabilator Electrostatic Discharger Inspection. ................................................... Stabilator Free Play Inspection............................................................................ Stabilator Actuator Shaft Play Inspection. .......................................................... Stabilator Actuator Upper Attachment Inspection.............................................. Stabilator Actuator Lower Attachment Inspection. ............................................ Left Stabilator-to-Pylon Attachment Fitting Inspection. .................................... Right Stabilator-to-Pylon Attachment Fitting Inspection. .................................. Right Attachment Bolt Inspection/Repair. .......................................................... Stabilator Elastomeric Bearing Inspection. ......................................................... Stabilator Actuator Attachment Fittings Inspection............................................ Stabilator Actuator Grounding Strap Inspection 701334−SUBQ ......................

2-3-5-3 2-3-6-1 2-3-6-1 2-3-6-1 2-3-7-1 2-3-7-1 2-3-7-1 2-3-8-1 2-3-8-1 2-3-9-1 2-3-9-1 2-3-10-1 2-3-10-1 2-3-10-2 2-3-10-2 2-3-11-1 2-3-11-1 2-3-12-1 2-3-12-1 2-3-13-1 2-3-13-1 2-3-14-1 2-3-14-1 2-3-14-1 2-3-15-1 2-3-15-2 2-3-15-2 2-3-15-2 2-3-15-3 2-3-15-3 2-3-15-3 2-3-15-5 2-3-15-6 2-3-15-6 2-3-15-8 2-3-15-8 2-3-15-8 2-3-15-9

Section 2-4 2-4-1 2-4-1.1 2-4-2 2-4-2.1

MAINTENANCE PROCEDURES ..................................................................... NOSE DOOR. ...................................................................................................... Replace Nose Door. ............................................................................................. NOSE DOOR LATCHES.................................................................................... Replace Nose Door Latches. ...............................................................................

2-4-1 2-4-1-1 2-4-1-1 2-4-2-1 2-4-2-1

V2-ii

Change 10

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-4-3 2-4-3.1 2-4-4 2-4-4.1 2-4-5 2-4-5.1 2-4-6 2-4-6.1 2-4-7 2-4-7.1 2-4-8 2-4-8.1 2-4-9 2-4-9.1 2-4-10 2-4-10.1 2-4-11 2-4-11.1 2-4-12 2-4-12.1 2-4-13 2-4-13.1 2-4-14 2-4-14.1 2-4-15 2-4-15.1 2-4-16 2-4-16.1 2-4-17 2-4-17.1 2-4-18 2-4-18.1 2-4-18.2 2-4-19 2-4-19.1 2-4-20 2-4-20.1 2-4-21 2-4-21.1 2-4-22 2-4-22.1 2-4-23 2-4-23.1 2-4-24

NOSE DOOR STRUT. ........................................................................................ Replace Nose Door Strut. .................................................................................... NOSE DOOR STRUT CATCH ASSEMBLY. .................................................. Replace Nose Door Strut Catch Assembly. ........................................................ NOSE DOOR HINGE FITTINGS. ..................................................................... Replace Nose Door Hinge Fittings. .................................................................... NOSE DOOR LOCK........................................................................................... Replace Nose Door Lock..................................................................................... NOSE DOOR COVER AND SCREEN. ........................................................... Replace Nose Door Cover and Screen................................................................ NOSE DOOR SEALS. ........................................................................................ Replace Nose Door Seals. ................................................................................... NOSE DOOR STOPS.......................................................................................... Replace Nose Door Stops.................................................................................... NOSE DOOR DRAIN HOSES. .......................................................................... Replace Nose Door Drain Hoses......................................................................... COCKPIT DOORS. ............................................................................................. Replace Cockpit Doors. ....................................................................................... COCKPIT DOOR ADJUSTMENT. .................................................................. Adjust Hinges, Latches, and Striker Plates......................................................... COCKPIT DOOR CHECK COMPONENTS. .................................................... Replace Cockpit Door Check Components......................................................... COCKPIT DOOR JETTISON COMPONENTS. ............................................... Replace Cockpit Door Jettison Components....................................................... COCKPIT DOOR RETAINER AND CLIP. ...................................................... Replace Cockpit Door Retainer and Clip. .......................................................... COCKPIT DOOR STATIONARY WINDOW................................................... Replace Cockpit Door Stationary Window......................................................... COCKPIT DOOR VENT WINDOW. ................................................................ Replace Cockpit Door Vent Window. ................................................................ COCKPIT DOOR JETTISONABLE WINDOW. .............................................. Replace Cockpit Door Jettisonable Window. ..................................................... Replace Cockpit Door Jettisonable Window Assembly Frame. ........................ COCKPIT DOOR FRONT CRANK MECHANISM......................................... Replace Cockpit Door Front Crank Mechanism................................................. COCKPIT DOOR LATCHES. ............................................................................ Replace Cockpit Door Latches............................................................................ COCKPIT DOOR REAR CRANK MECHANISM. .......................................... Replace Cockpit Door Rear Crank Mechanism.................................................. COCKPIT DOOR STRIKER PLATES. ............................................................. Replace Cockpit Door Striker Plates................................................................... COCKPIT DOOR SEAL. .................................................................................... Replace Cockpit Door Seal. ................................................................................ COCKPIT DOOR CONDUCTIVE SEALS. ......................................................

Change 10

2-4-3-1 2-4-3-1 2-4-4-1 2-4-4-1 2-4-5-1 2-4-5-1 2-4-6-1 2-4-6-1 2-4-7-1 2-4-7-1 2-4-8-1 2-4-8-1 2-4-9-1 2-4-9-1 2-4-10-1 2-4-10-1 2-4-11-1 2-4-11-1 2-4-12-1 2-4-12-1 2-4-13-1 2-4-13-1 2-4-14-1 2-4-14-1 2-4-15-1 2-4-15-1 2-4-16-1 2-4-16-1 2-4-17-1 2-4-17-1 2-4-18-1 2-4-18-1 2-4-18-5 2-4-19-1 2-4-19-1 2-4-20-1 2-4-20-1 2-4-21-1 2-4-21-1 2-4-22-1 2-4-22-1 2-4-23-1 2-4-23-1 2-4-24-1

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V2-iii

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-4-24.1 2-4-25 2-4-25.1 2-4-26 2-4-26.1 2-4-27 2-4-27.1 2-4-28 2-4-28.1 2-4-28.2 2-4-29 2-4-29.1 2-4-29.2 2-4-30 2-4-30.1 2-4-31 2-4-31.1 2-4-32 2-4-32.1 2-4-32.2 2-4-32.3 2-4-33 2-4-33.1 2-4-33.2 2-4-34 2-4-34.1 2-4-34.2 2-4-34.3 2-4-35 2-4-35.1 2-4-35.2 2-4-36 2-4-36.1 2-4-37 2-4-37.1 2-4-38 2-4-38.1 2-4-39 2-4-39.1 2-4-40 2-4-40.1 2-4-41 2-4-41.1 2-4-42

V2-iv

Replace Cockpit Door Conductive Seals. ........................................................... COCKPIT DOOR HINGE FITTINGS. .............................................................. Replace Cockpit Door Hinge Fittings. ................................................................ COCKPIT DOOR HINGE ROD ENDS. ............................................................ Replace Cockpit Door Hinge Rod Ends. ............................................................ COCKPIT DOOR LOCK. ................................................................................... Replace Cockpit Door Lock. ............................................................................... GLARE SHIELD. ................................................................................................ Replace Glare Shield. .......................................................................................... Repair Glare Shield.............................................................................................. INSTRUMENT PANEL. ..................................................................................... Replace Instrument Panel. ................................................................................... Repair Instrument Panel....................................................................................... NOSE SECTION AVIONIC COMPARTMENT COVER. ............................... Replace Nose Section Avionic Compartment Cover.......................................... NOSE SECTION THERMAL BARRIERS........................................................ Replace Nose Section Thermal Barriers. ............................................................ NOSE VIBRATION ABSORBER (SPRING-TYPE). ....................................... Replace Nose Vibration Absorber (Spring-Type)............................................... Inspect/Repair Nose Vibration Absorber (Spring-Type). ................................... Adjust Nose Vibration Absorber Tuning Weights. ............................................ NOSE VIBRATION ABSORBER (BOX-TYPE). ............................................. Replace Nose Vibration Absorber (Box-Type)................................................... Inspect/Repair Nose Vibration Absorber (Box-Type). ....................................... CABIN VIBRATION ABSORBER (SPRING-TYPE). ..................................... Replace Cabin Vibration Absorber (Spring-Type). ............................................ Inspect/Repair Cabin Vibration Absorber (Spring-Type)................................... Adjust Cabin Vibration Absorber Tuning Weights. ........................................... CABIN VIBRATION ABSORBER (BOX-TYPE). ........................................... Replace Cabin Vibration Absorber (Box-Type). ................................................ Inspect/Repair Cabin Vibration Absorber (Box-Type)....................................... ROLL VIBRATION ABSORBER ROLL ........................................................ Replace Roll Vibration Absorber. ....................................................................... UPPER WINDOWS............................................................................................. Replace Upper Windows. .................................................................................... LOWER WINDOWS........................................................................................... Replace Lower Windows..................................................................................... OUTBOARD WINDSHIELDS. .......................................................................... Replace Outboard Windshields. .......................................................................... CENTER WINDSHIELD (GLASS). .................................................................. Replace Center Windshield (Glass)..................................................................... CENTER WINDSHIELD (PLASTIC)................................................................ Replace Center Windshield (Plastic)................................................................... WINDOW, WINDSHIELD, AND DOOR LEAK TEST...................................

Change 10

2-4-24-1 2-4-25-1 2-4-25-1 2-4-26-1 2-4-26-1 2-4-27-1 2-4-27-1 2-4-28-1 2-4-28-1 2-4-28-3 2-4-29-1 2-4-29-1 2-4-29-3 2-4-30-1 2-4-30-1 2-4-31-1 2-4-31-1 2-4-32-1 2-4-32-2 2-4-32-5 2-4-32-10 2-4-33-1 2-4-33-2 2-4-33-3 2-4-34-1 2-4-34-2 2-4-34-4 2-4-34-8 2-4-35-1 2-4-35-1 2-4-35-3 2-4-36-1 2-4-36-1 2-4-37-1 2-4-37-1 2-4-38-1 2-4-38-1 2-4-39-1 2-4-39-1 2-4-40-1 2-4-40-1 2-4-41-1 2-4-41-1 2-4-42-1

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TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-4-42.1 2-4-42.2 2-4-42.3 2-4-42.4 2-4-43 2-4-43.1 2-4-43.2 2-4-43.3 2-4-44 2-4-44.1 2-4-44.2 2-4-44.3 2-4-44.4 2-4-44.5 2-4-44.6 2-4-44.7 2-4-44.8 2-4-44.9 2-4-44.10 2-4-44.11 2-4-44.12 2-4-44.13 2-4-44.14 2-4-44.15 2-4-44.16 2-4-44.17 2-4-44.18 2-4-44.19 2-4-44.20 2-4-44.21 2-4-44.22 2-4-44.23 2-4-44.24 2-4-44.25 2-4-44.26 2-4-44.27 2-4-44.28 2-4-44.29 2-4-45 2-4-45.1 2-4-45.2 2-4-45.3 2-4-45.4 2-4-45.5

Nose Door Leak Test........................................................................................... Center/Outboard Windshield and Upper/Lower Window Leak Test................. Crew Chief’s Window Leak Test........................................................................ Cabin Door and Window Leak Test. .................................................................. COCKPIT FLOORS. ........................................................................................... Replace/Repair Cockpit Floor Covers................................................................. Repair Cockpit Floors.......................................................................................... Replace/Repair Access Panel............................................................................... PILOT’S/COPILOT’S SEATS, RA 30525-1, 100900-1, AND 100900-5. ....... Replace Inertia Reel............................................................................................. Replace Inertia Reel Control. .............................................................................. Replace Shoulder Harness. .................................................................................. Replace Lap Belts. ............................................................................................... Replace Crotch Belt, Buckle, and Pad................................................................ Replace Seat Cushions......................................................................................... Replace Front-to-Rear Adjust Cables and Adjust Handle Baseplate................. Replace Up-and-Down Extension Spring and Retainer. .................................... Replace Up-and-Down Attenuator. ..................................................................... Replace Up-and-Down Yoke and Cable. ............................................................ Replace Up-and-Down Release Handle and Baseplate. ..................................... Replace Up-and-Down Vertical Adjustment Track............................................ Replace Seat Bucket. ........................................................................................... Replace Shoulder Harness Rubbing Bar. ............................................................ Replace Seat Frame Upper Tube and Supports.................................................. Replace Up-and-Down Guide Tube. ................................................................... Replace Midframe Support and Tube. ................................................................ Replace Trunnion and Tube. ............................................................................... Replace Bearings and Brackets. .......................................................................... Replace Seat Frame Tilt Handle Jacket. ............................................................. Replace Seat Frame Diagonal Strap.................................................................... Replace Seat Frame Diagonal Strut and Strut Support. ..................................... Replace Seat Frame Frangible Strut.................................................................... Replace Seat Frame Track Rollers and Bearings. .............................................. Replace Pilot’s Stowage Box, Panel, and Bag. .................................................. Replace Copilot’s Stowage Box, Panel, and Bag............................................... Replace Armored Wing. ...................................................................................... Replace Pilot’s/Copilot’s Seat. ............................................................................ Replace Trunnion Threaded Insert. ..................................................................... CREW CHIEF’S/PASSENGER’S SEATS. ........................................................ Replace Seat Head Rest....................................................................................... Replace Lower Energy Attenuator. ..................................................................... Replace Upper Energy Attenuator....................................................................... Replace Cable....................................................................................................... Replace Anti-Sag Device.....................................................................................

2-4-42-1 2-4-42-2 2-4-42-3 2-4-42-3 2-4-43-1 2-4-43-1 2-4-43-2 2-4-43-2 2-4-44-1 2-4-44-3 2-4-44-4 2-4-44-4 2-4-44-7 2-4-44-7 2-4-44-9 2-4-44-13 2-4-44-16 2-4-44-17 2-4-44-19 2-4-44-23 2-4-44-25 2-4-44-27 2-4-44-27 2-4-44-30 2-4-44-31 2-4-44-32 2-4-44-36 2-4-44-39 2-4-44-40 2-4-44-41 2-4-44-43 2-4-44-45 2-4-44-47 2-4-44-49 2-4-44-51 2-4-44-53 2-4-44-57 2-4-44-63 2-4-45-1 2-4-45-2 2-4-45-2 2-4-45-2 2-4-45-6 2-4-45-6

Change 10

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

V2-v

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-4-45.6 2-4-45.7 2-4-45.8 2-4-45.9 2-4-45.10 2-4-45.11 2-4-45.12 2-4-46 2-4-46.1 2-4-47 2-4-47.1 2-4-48 2-4-48.1 2-4-49 2-4-49.1 2-4-50 2-4-50.1 2-4-51 2-4-51.1 2-4-52 2-4-52.1 2-4-53 2-4-53.1 2-4-53.2 2-4-53.3 2-4-54 2-4-54.1 2-4-55 2-4-55.1 2-4-56 2-4-56.1 2-4-57 2-4-57.1 2-4-58 2-4-58.1 2-4-58.2 2-4-58.3 2-4-58.4 2-4-58.5 2-4-58.6 2-4-58.7 2-4-58.8 2-4-59 2-4-59.1

V2-vi

Replace Seat Cover.............................................................................................. Replace Latch....................................................................................................... Replace Disconnect Fitting.................................................................................. Replace Seat Upper Supports. ............................................................................. Replace Seat Upper Support Fittings. ................................................................ Repair Seat. .......................................................................................................... Replace Seat. ........................................................................................................ PASSENGER’S SEAT RESTRAINT SYSTEM................................................ Replace Passenger’s Seat Restraint System........................................................ CREW CHIEF’S SEAT RESTRAINT SYSTEM. ............................................. Replace Crew Chief’s Seat Restraint System. .................................................... CREW CHIEF’S WINDOW. .............................................................................. Replace Crew Chief’s Window. .......................................................................... CREW CHIEF’S WINDOW LATCH ASSEMBLY.......................................... Replace Crew Chief’s Window Latch Assembly. .............................................. CREW CHIEF’S WINDOW SLIDE................................................................... Replace Crew Chief’s Window Slide. ................................................................ CREW CHIEF’S WINDOW SEALS.................................................................. Replace Crew Chief’s Window Seals. ................................................................ CREW CHIEF’S WINDOW UPPER TRACK SEALS. .................................... Replace Crew Chief’s Window Upper Track Seals. .......................................... CREW CHIEF’S WINDOW UPPER AND LOWER ROLLERS..................... Replace Roller Assembly..................................................................................... Replace Lower Rollers......................................................................................... Replace Upper Rollers. ........................................................................................ CREW CHIEF’S WINDOW SECURITY DEVICE. ......................................... Replace Crew Chief’s Window Security Device................................................ CABIN DOORS................................................................................................... Replace Cabin Doors. .......................................................................................... CABIN DOOR WINDOWS................................................................................ Replace Cabin Door Windows. ........................................................................... CABIN DOOR LOWER TRACK....................................................................... Replace Cabin Door Lower Track. ..................................................................... CABIN DOOR SEALS. ...................................................................................... Replace Window Seals. ....................................................................................... Replace Door Front Seals.................................................................................... Replace Upper Door Frame Seal Block.............................................................. Replace Door Bottom Seal or Seal Blocks/Sheath Seal..................................... Replace Lower Track Seal Block........................................................................ Replace Upper Door Seal. ................................................................................... Replace Door Fairing Seal................................................................................... Replace Fuselage Rear Door Seal. ...................................................................... CABIN DOOR FAIRING SEAL. ....................................................................... Replace Cabin Door Fairing Seal........................................................................

Change 10

2-4-45-8 2-4-45-10 2-4-45-10 2-4-45-12 2-4-45-14 2-4-45-17 2-4-45-17 2-4-46-1 2-4-46-1 2-4-47-1 2-4-47-1 2-4-48-1 2-4-48-1 2-4-49-1 2-4-49-1 2-4-50-1 2-4-50-1 2-4-51-1 2-4-51-1 2-4-52-1 2-4-52-1 2-4-53-1 2-4-53-1 2-4-53-3 2-4-53-3 2-4-54-1 2-4-54-1 2-4-55-1 2-4-55-1 2-4-56-1 2-4-56-1 2-4-57-1 2-4-57-1 2-4-58-1 2-4-58-2 2-4-58-3 2-4-58-6 2-4-58-6 2-4-58-7 2-4-58-7 2-4-58-8 2-4-58-8 2-4-59-1 2-4-59-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-4-60 2-4-60.1 2-4-61 2-4-61.1 2-4-62 2-4-62.1 2-4-63 2-4-63.1 2-4-64 2-4-64.1 2-4-65 2-4-65.1 2-4-66 2-4-66.1 2-4-67 2-4-67.1 2-4-68 2-4-68.1 2-4-69 2-4-69.1 2-4-70 2-4-70.1 2-4-70.2 2-4-70.3 2-4-70.4 2-4-70.5 2-4-71 2-4-71.1 2-4-72 2-4-72.1 2-4-73 2-4-73.1 2-4-74 2-4-74.1 2-4-75 2-4-75.1 2-4-76 2-4-76.1 2-4-77 2-4-77.1 2-4-78 2-4-78.1 2-4-79 2-4-79.1

CABIN DOOR HANDLES. ................................................................................ Replace Cabin Door Handles. ............................................................................. CABIN DOOR LATCH ASSEMBLY................................................................ Replace Cabin Door Latch Assembly. ................................................................ CABIN DOOR RECEIVER. ............................................................................... Replace Cabin Door Receiver. ............................................................................ CABIN DOOR STOP MECHANISM. ............................................................... Replace Cabin Door Stop Mechanism. ............................................................... CABIN DOOR UPPER/LOWER ROLLER SUPPORTS AND ROLLERS..... Replace Cabin Door Upper/Lower Roller Supports and Rollers. ...................... CABIN DOOR UPPER FAIRINGS. .................................................................. Replace Cabin Door Upper Fairings. .................................................................. CABIN DOOR LOCK......................................................................................... Replace Cabin Door Lock. .................................................................................. CABIN DOOR WINDOW JETTISON MECHANISM..................................... Replace Cabin Door Window Jettison Mechanism. ........................................... CABIN DOOR WINDOW JETTISON MECHANISM GUARD. .................... Replace Cabin Door Window Jettison Mechanism Guard................................. SOUNDPROOFING PANELS............................................................................ Replace Soundproofing Panels. ........................................................................... MAIN TRANSMISSION DRIP PAN................................................................. Replace Drain Tubes............................................................................................ Replace Drip Pan and Support. ........................................................................... Replace Drip Pan Seals. ...................................................................................... Replace Drip Pan Cover Seals. ........................................................................... Replace Support Seal. .......................................................................................... CABIN FLOOR. .................................................................................................. Replace Cabin Floor. ........................................................................................... CARGO HOOK DOOR FLOOR SEAL............................................................. Replace Cargo Hook Door Strap Seal. ............................................................... CABIN FLOOR SEAT STUDS.......................................................................... Replace Cabin Floor Seat Studs.......................................................................... CABIN FLOOR LEVELING PLATE. ............................................................... Replace Cabin Floor Leveling Plate. .................................................................. CARGO HOOK DOOR....................................................................................... Replace Cargo Hook Door. ................................................................................. CARGO HOOK DOOR LATCHES. .................................................................. Replace Cargo Hook Door Latches..................................................................... CARGO HOOK DOOR SEALS. ........................................................................ Replace Cargo Hook Door Seals......................................................................... CARGO HOOK DOOR HINGES....................................................................... Replace Cargo Hook Door Hinges...................................................................... WIRE STRIKE UPPER CUTTER...................................................................... Replace Wire Strike Upper Cutter. .....................................................................

Change 10

2-4-60-1 2-4-60-1 2-4-61-1 2-4-61-1 2-4-62-1 2-4-62-1 2-4-63-1 2-4-63-1 2-4-64-1 2-4-64-1 2-4-65-1 2-4-65-1 2-4-66-1 2-4-66-1 2-4-67-1 2-4-67-1 2-4-68-1 2-4-68-1 2-4-69-1 2-4-69-1 2-4-70-1 2-4-70-1 2-4-70-4 2-4-70-6 2-4-70-6 2-4-70-8 2-4-71-1 2-4-71-2 2-4-72-1 2-4-72-1 2-4-73-1 2-4-73-1 2-4-74-1 2-4-74-1 2-4-75-1 2-4-75-1 2-4-76-1 2-4-76-1 2-4-77-1 2-4-77-1 2-4-78-1 2-4-78-1 2-4-79-1 2-4-79-1

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TABLE OF CONTENTS (Cont)

Page 2-4-80 2-4-80.1 2-4-81 2-4-81.1 2-4-82 2-4-82.1 2-4-83 2-4-83.1 2-4-84 2-4-84.1 2-4-85 2-4-85.1 2-4-86 2-4-86.1 2-4-87 2-4-87.1 2-4-88 2-4-88.1 2-4-89 2-4-89.1 2-4-90 2-4-90.1 2-4-91 2-4-91.1 2-4-92 2-4-92.1 2-4-93 2-4-93.1 2-4-93.2 2-4-94 2-4-94.1 2-4-95 2-4-95.1 2-4-96 2-4-96.1 2-4-97 2-4-97.1 2-4-98 2-4-98.1 2-4-99 2-4-99.1 2-4-100 2-4-100.1 2-4-101 V2-viii

WIRE STRIKE PITOT CUTTER. ...................................................................... Replace Wire Strike Pitot Cutter......................................................................... WIRE STRIKE PITOT CUTTER GUIDE CHANNEL..................................... Replace Wire Strike Pitot Cutter Guide Channel. .............................................. WIRE STRIKE WINDSHIELD WIPER DRIVE POST DEFLECTORS. ........ Replace Wire Strike Windshield Wiper Drive Post Deflectors. ........................ WIRE STRIKE MAIN LANDING GEAR CUTTERS...................................... Replace Wire Strike Main Landing Gear Cutters............................................... WIRE STRIKE MAIN LANDING GEAR CUTTER CLAMPS....................... Replace Wire Strike Main Landing Gear Cutter Clamps................................... WIRE STRIKE MAIN LANDING GEAR JOINT DEFLECTORS.................. Replace Wire Strike Main Landing Gear Joint Deflectors................................. WIRE STRIKE TAIL LANDING GEAR DEFLECTOR.................................. Replace Wire Strike Tail Landing Gear Deflector. ............................................ WIRE STRIKE TAIL LANDING GEAR DEFLECTOR CLAMP................... Replace Wire Strike Tail Landing Gear Deflector Clamp. ................................ WIRE STRIKE STEP DEFLECTORS. .............................................................. Replace Wire Strike Step Deflectors................................................................... WIRE STRIKE STEP EXTENSIONS................................................................ Replace Wire Strike Step Extensions.................................................................. WIRE STRIKE COCKPIT DOOR LATCH DEFLECTORS. ........................... Replace Wire Strike Cockpit Door Latch Deflectors. ........................................ WIRE STRIKE WINDSHIELD CENTER POST DEFLECTOR INSERTS. ... Replace Wire Strike Windshield Center Post Deflector Inserts......................... WIRE STRIKE WINDSHIELD CENTER POST DEFLECTOR CHANNELS. ................................................................................................................... Replace Wire Strike Windshield Center Post Deflector Channels..................... FUSELAGE JACKPADS. ................................................................................... Replace Drag Beam Support Jackpad. ................................................................ Replace Tail Cone Jackpad. ................................................................................ DRAG BEAM SUPPORT FAIRINGS. .............................................................. Replace Drag Beam Support Fairings................................................................. LOWER MAIN LANDING GEAR FAIRINGS ESSS .................................. Replace Lower Main Landing Gear Fairings. .................................................... UPPER MAIN LANDING GEAR FAIRINGS ESSS .................................... Replace Upper Main Landing Gear Fairings...................................................... TAIL LANDING GEAR FAIRING.................................................................... Replace Tail Landing Gear Fairing..................................................................... UPPER ESSS FITTING FAIRING AND PLATFORM ESSS ..................... Replace Upper ESSS Fitting Fairing and Platform. ........................................... COCKPIT STEPS. ............................................................................................... Replace Cockpit Steps. ........................................................................................ CABIN STEPS..................................................................................................... Replace Cabin Steps. .......................................................................................... MAIN ROTOR PYLON SLIDING COVER...................................................... Change 10

2-4-80-1 2-4-80-1 2-4-81-1 2-4-81-1 2-4-82-1 2-4-82-1 2-4-83-1 2-4-83-1 2-4-84-1 2-4-84-1 2-4-85-1 2-4-85-1 2-4-86-1 2-4-86-1 2-4-87-1 2-4-87-1 2-4-88-1 2-4-88-1 2-4-89-1 2-4-89-1 2-4-90-1 2-4-90-1 2-4-91-1 2-4-91-1 2-4-92-1 2-4-92-1 2-4-93-1 2-4-93-1 2-4-93-2 2-4-94-1 2-4-94-1 2-4-95-1 2-4-95-1 2-4-96-1 2-4-96-1 2-4-97-1 2-4-97-1 2-4-98-1 2-4-98-1 2-4-99-1 2-4-99-1 2-4-100-1 2-4-100-1 2-4-101-1

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TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-4-101.1 2-4-102 2-4-102.1 2-4-103 2-4-103.1 2-4-104 2-4-104.1 2-4-105 2-4-105.1 2-4-106 2-4-106.1 2-4-107 2-4-107.1 2-4-108 2-4-108.1 2-4-109 2-4-109.1 2-4-110 2-4-110.1 2-4-111 2-4-111.1 2-4-112 2-4-112.1 2-4-113 2-4-113.1 2-4-114 2-4-114.1 2-4-115 2-4-115.1 2-4-116 2-4-116.1 2-4-117 2-4-117.1 2-4-118 2-4-118.1 2-4-119 2-4-119.1 2-4-120 2-4-120.1 2-4-121 2-4-121.1 2-4-122 2-4-122.1 2-4-123

Replace Main Rotor Pylon Sliding Cover. ......................................................... MAIN ROTOR PYLON SLIDING COVER LATCHES. ................................. Replace Main Rotor Pylon Sliding Cover Latches............................................. MAIN ROTOR PYLON SLIDING COVER VERTICAL ROLLERS. ............ Replace Main Rotor Pylon Sliding Cover Vertical Rollers. .............................. MAIN ROTOR PYLON SLIDING COVER HORIZONTAL ROLLERS. ...... Replace Main Rotor Pylon Sliding Cover Horizontal Rollers. .......................... MAIN ROTOR PYLON WORK PLATFORM.................................................. Replace Main Rotor Pylon Work Platform......................................................... MAIN ROTOR PYLON AIR INLET FAIRINGS. ............................................ Replace Main Rotor Pylon Air Inlet Fairings..................................................... MAIN ROTOR PYLON TRANSMISSION COVER. ....................................... Replace Main Rotor Pylon Transmission Cover. ............................................... APU ACCESS DOORS....................................................................................... Replace APU Access Doors. ............................................................................... APU SCREENS. .................................................................................................. Replace APU Screens. ......................................................................................... APU ACCESS DOOR BEAM. ........................................................................... Replace APU Access Door Beam. ...................................................................... APU EXHAUST FAIRING................................................................................. Replace APU Exhaust Fairing............................................................................. APU PANEL........................................................................................................ Replace APU Panel.............................................................................................. OIL COOLER COMPARTMENT ACCESS DOORS....................................... Replace Oil Cooler Compartment Access Doors. .............................................. IR JAMMER FAIRING....................................................................................... Replace IR Jammer Fairing. ................................................................................ IR JAMMER PANEL.......................................................................................... Replace IR Jammer Panel.................................................................................... MAIN ROTOR PYLON REAR FAIRING. ....................................................... Replace Main Rotor Pylon Rear Fairing............................................................. YAW PUSHROD BOOT AND SHROUD......................................................... Replace Yaw Pushrod Boot and Shroud............................................................. ENGINE COWLINGS......................................................................................... Replace Engine Cowlings.................................................................................... ENGINE COWLING BLANKET INSULATION. ............................................ Replace Engine Cowling Blanket Insulation. ..................................................... ENGINE COWLING LATCH. ........................................................................... Replace Engine Cowling Latch. .......................................................................... ENGINE COWLING FITTINGS........................................................................ Replace Engine Cowling Fittings........................................................................ ENGINE COWLING SUPPORT FITTINGS. .................................................... Replace Engine Cowling Support Fittings.......................................................... ENGINE COMPARTMENT HEAT SHIELDS. ................................................

Change 10

2-4-101-1 2-4-102-1 2-4-102-1 2-4-103-1 2-4-103-1 2-4-104-1 2-4-104-1 2-4-105-1 2-4-105-1 2-4-106-1 2-4-106-1 2-4-107-1 2-4-107-1 2-4-108-1 2-4-108-1 2-4-109-1 2-4-109-1 2-4-110-1 2-4-110-1 2-4-111-1 2-4-111-1 2-4-112-1 2-4-112-1 2-4-113-1 2-4-113-1 2-4-114-1 2-4-114-1 2-4-115-1 2-4-115-1 2-4-116-1 2-4-116-1 2-4-117-1 2-4-117-1 2-4-118-1 2-4-118-1 2-4-119-1 2-4-119-1 2-4-120-1 2-4-120-1 2-4-121-1 2-4-121-1 2-4-122-1 2-4-122-1 2-4-123-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

V2-ix

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TABLE OF CONTENTS (Cont)

Page 2-4-123.1 2-4-124 2-4-124.1 2-4-125 2-4-125.1 2-4-126 2-4-126.1 2-4-127 2-4-127.1 2-4-128 2-4-128.1 2-4-129 2-4-129.1 2-4-130 2-4-130.1 2-4-131 2-4-131.1 2-4-132 2-4-132.1 2-4-133 2-4-133.1 2-4-134 2-4-134.1 2-4-135 2-4-135.1 2-4-136 2-4-136.1 2-4-137 2-4-137.1 2-4-138 2-4-138.1 2-4-139 2-4-139.1 2-4-140 2-4-140.1 2-4-141 2-4-141.1 2-4-142 2-4-142.1 2-4-143 2-4-143.1 2-4-144 2-4-144.1 2-4-145

V2-x

Replace Engine Compartment Heat Shields. ...................................................... TRANSITION SECTION AVIONICS DOOR................................................... Replace Transition Section Avionics Door......................................................... TRANSITION SECTION AVIONICS DOOR STRUT..................................... Replace Transition Section Avionics Door Strut................................................ TRANSITION SECTION AVIONICS DOOR EYEBOLT AND SUPPORT. . Replace Transition Section Avionics Door Eyebolt and Support...................... TRANSITION SECTION AVIONICS DOOR STRUT LOCK FITTING........ Replace Transition Section Avionics Door Strut Lock Fitting. ......................... TRANSITION SECTION AVIONICS DOOR HINGES................................... Replace Transition Section Avionics Door Hinges. ........................................... TRANSITION SECTION AVIONICS DOOR SEALS. .................................... Replace Transition Section Avionics Door Seals. .............................................. TRANSITION SECTION AVIONICS DOOR LATCHES. .............................. Replace Transition Section Avionics Door Latches. .......................................... TAIL ROTOR DRIVE SHAFT COVERS. ........................................................ Replace Tail Rotor Drive Shaft Covers. ............................................................. TAIL ROTOR PYLON. ...................................................................................... Replace Tail Rotor Pylon. ................................................................................... TAIL ROTOR PYLON LOWER FAIRING. ..................................................... Replace Tail Rotor Pylon Lower Fairing............................................................ TAIL ROTOR PYLON STABILATOR-TO-PYLON FAIRING. ..................... Replace Tail Rotor Pylon Stabilator-to-Pylon Fairing. ...................................... TAIL ROTOR PYLON CAMBERED FAIRING. ............................................. Replace Tail Rotor Pylon Cambered Fairing...................................................... TAIL ROTOR PYLON TRAILING EDGE FAIRING/ANTENNA. ................ Replace Tail Rotor Pylon Trailing Edge Fairing/Antenna. ................................ TAIL GEAR BOX FAIRING. ............................................................................ Replace Tail Gear Box Fairing. .......................................................................... TAIL ROTOR PYLON LEADING EDGE COVER/ANTENNA. .................... Replace Tail Rotor Pylon Leading Edge Cover/Antenna................................... INTERMEDIATE GEAR BOX FAIRING......................................................... Replace Intermediate Gear Box Fairing.............................................................. TAIL ROTOR PYLON STEPS........................................................................... Replace Tail Rotor Pylon Steps. ......................................................................... TAIL ROTOR PYLON LOWER STEP. ............................................................ Replace Tail Rotor Pylon Lower Step. ............................................................... STABILATOR. .................................................................................................... Replace Stabilator. ............................................................................................... STABILATOR ELECTROSTATIC DISCHARGERS....................................... Replace Stabilator Electrostatic Dischargers....................................................... STABILATOR ATTACHMENT FITTINGS. .................................................... Replace Stabilator Attachment Fittings............................................................... STABILATOR TIP CAPS. .................................................................................

Change 10

2-4-123-1 2-4-124-1 2-4-124-1 2-4-125-1 2-4-125-1 2-4-126-1 2-4-126-1 2-4-127-1 2-4-127-1 2-4-128-1 2-4-128-1 2-4-129-1 2-4-129-1 2-4-130-1 2-4-130-1 2-4-131-1 2-4-131-1 2-4-132-1 2-4-132-2 2-4-133-1 2-4-133-1 2-4-134-1 2-4-134-1 2-4-135-1 2-4-135-1 2-4-136-1 2-4-136-1 2-4-137-1 2-4-137-2 2-4-138-1 2-4-138-1 2-4-139-1 2-4-139-1 2-4-140-1 2-4-140-1 2-4-141-1 2-4-141-1 2-4-142-1 2-4-142-2 2-4-143-1 2-4-143-1 2-4-144-1 2-4-144-1 2-4-145-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-4-145.1 2-4-146 2-4-146.1 2-4-147 2-4-147.1 2-4-148 2-4-148.1 2-4-149 2-4-149.1 2-4-150 2-4-151 2-4-151.1 2-4-152 2-4-152.1 2-4-153 2-4-153.1 2-4-154 2-4-154.1 2-4-155 2-4-155.1 2-4-156 2-4-156.1 2-4-156.2 2-4-156.3 2-4-156.4 2-4-156.5 Section 2-5 2-5-1 2-5-1.1 2-5-2 2-5-2.1 2-5-3 2-5-3.1 2-5-4 2-5-4.1 2-5-5 2-5-5.1 2-5-6 2-5-6.1 2-5-7

Replace Stabilator Tip Caps. ............................................................................... STABILATOR ACTUATOR. ............................................................................. Replace Stabilator Actuator. ................................................................................ STABILATOR ACTUATOR REPAIR............................................................... Repair Stabilator Actuator. .................................................................................. STABILATOR ACTUATOR ADJUSTMENT................................................... Adjust Stabilator Actuator. .................................................................................. STABILATOR ACTUATOR GROUNDING STRAP 701334−SUBQ ............ Replace Stabilator Actuator Grounding Strap..................................................... DELETED. ........................................................................................................... POSITION TRANSMITTER LIMIT SWITCH. ................................................ Replace Position Transmitter Limit Switch. ....................................................... CREW CHIEF’S/PASSENGER’S SEAT - 14 SEAT CONFIGURATION...... Replace Crew Chief’s/Passenger’s Seat - 14 Seat Configuration. ..................... CREW CHIEF’S/PASSENGER’S SEAT - 20 SEAT CONFIGURATION...... Replace Crew Chief’s/Passenger’s Seat - 20 Seat Configuration. ..................... CREW CHIEF’S/PASSENGER’S SEAT PALLETS - 20 SEAT CONFIGURATION. ............................................................................................ Replace Crew Chief’s/Passenger’s Seat Pallets - 20 Seat Configuration. ......... AUXILIARY SEARCHLIGHT SUPPORT........................................................ Replace Auxiliary Searchlight Support. .............................................................. FAST ROPE SYSTEM........................................................................................ Replace Fries Bar Assembly. .............................................................................. Replace Fries Bar Support Assembly. ................................................................ Replace Fries Bar Cap Assembly........................................................................ Replace Cable Assembly. .................................................................................... Replace Crew Chief’s Release Assembly ...........................................................

2-4-145-1 2-4-146-1 2-4-146-2 2-4-147-1 2-4-147-2 2-4-148-1 2-4-148-1 2-4-149-1 2-4-149-1 2-4-150-1 2-4-151-1 2-4-151-2 2-4-152-1 2-4-152-1 2-4-153-1 2-4-153-1

MAINTENANCE PROCEDURES (BENCH).................................................... COCKPIT DOOR HINGE SUPPORT FITTING (BENCH). ........................... Repair Cockpit Door Hinge Support Fitting (BENCH). .................................... NOSE VIBRATION ABSORBER LOWER FITTING BUSHINGS (BENCH). ........................................................................................................... Replace Nose Vibration Absorber Lower Fitting Bushings (BENCH). ............ NOSE VIBRATION ABSORBER FITTING BEARINGS (BENCH). ............. Replace Nose Vibration Absorber Fitting Bearings (BENCH).......................... CABIN VIBRATION ABSORBER FITTING BEARINGS (BENCH). ........... Replace Cabin Vibration Absorber Fitting Bearings (BENCH). ....................... CABIN VIBRATION ABSORBER SPRING BUSHINGS (BENCH). ............ Replace Cabin Vibration Absorber Spring Bushings (BENCH)........................ VIBRATION ABSORBER AIRFRAME NOSE FITTING BUSHINGS (BENCH).............................................................................................................. Replace Vibration Absorber Airframe Nose Fitting Bushings (BENCH). ........ VIBRATION ABSORBER AIRFRAME CABIN FITTING BUSHINGS (BENCH)..............................................................................................................

2-5-1 2-5-1-1 2-5-1-1

Change 10

2-4-154-1 2-4-154-1 2-4-155-1 2-4-155-1 2-4-156-1 2-4-156-1 2-4-156-3 2-4-156-6 2-4-156-6 2-4-156-6

2-5-2-1 2-5-2-1 2-5-3-1 2-5-3-2 2-5-4-1 2-5-4-2 2-5-5-1 2-5-5-2 2-5-6-1 2-5-6-1 2-5-7-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

V2-xi

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-5-7.1 2-5-8 2-5-8.1 2-5-9 2-5-9.1 2-5-10 2-5-10.1 2-5-11 2-5-11.1 2-5-12 2-5-12.1 2-5-13 2-5-13.1 2-5-14 2-5-14.1 2-5-15 2-5-15.1 2-5-16 2-5-16.1 2-5-17 2-5-17.1 2-5-18 2-5-18.1 2-5-19 2-5-19.1 2-5-19.2 2-5-20 2-5-20.1 2-5-21 2-5-21.1 2-5-22 2-5-22.1 2-5-23 2-5-23.1 2-5-24 2-5-24.1

V2-xii

Replace Vibration Absorber Airframe Cabin Fitting Bushings (BENCH)........ VIBRATION ABSORBER AIRFRAME CABIN FITTING BEARINGS (BENCH).............................................................................................................. Replace Vibration Absorber Airframe Cabin Fitting Bearings (BENCH). ....... MAIN LANDING GEAR FUSELAGE FITTING SPHERICAL BEARING (BENCH).............................................................................................................. Replace Main Landing Gear Fuselage Fitting Spherical Bearing (BENCH). ... CABIN DOOR WINDOW (BENCH)................................................................. Replace Cabin Door Window (BENCH). ........................................................... CABIN DOOR WINDOW FRAME (BENCH). ................................................ Repair Cabin Door Window Frame (BENCH)................................................... SOUNDPROOFING PANEL (BENCH)............................................................. Repair Soundproofing Panel (BENCH)............................................................... ENGINE COWLING SUPPORT FITTING BEARING (BENCH)................... Replace Engine Cowling Support Fitting Bearing (BENCH)............................ ENGINE COWLING SUPPORT FITTING BUSHINGS (BENCH). ............... Replace Engine Cowling Support Fitting Bushings (BENCH).......................... ENGINE COWLING FITTING BEARING (BENCH). ................................... Replace Engine Cowling Fitting Bearing (BENCH).......................................... OIL COOLER SUPPORT (BENCH).................................................................. Repair Oil Cooler Support (BENCH). ................................................................ OIL COOLER FORWARD SUPPORT (BENCH). .......................................... Replace Oil Cooler Forward Support (BENCH). ............................................... OIL COOLER REAR SUPPORT (BENCH)...................................................... Replace Oil Cooler Rear Support (BENCH). ..................................................... TAIL ROTOR DRIVE SHAFT SUPPORT (BENCH). ..................................... Replace Tail Rotor Drive Shaft Support (One-Piece Configuration) (BENCH).............................................................................................................. Replace Tail Rotor Drive Shaft Support (Two-Piece Configuration) (BENCH).............................................................................................................. STABILATOR ELASTOMERIC BEARING (BENCH). .................................. Replace Stabilator Elastomeric Bearing (BENCH). ........................................... STABILATOR POSITION TRANSMITTER/LIMIT SWITCHES (BENCH).............................................................................................................. Replace Stabilator Position Transmitter/Limit Switches (BENCH)................... STABILATOR POSITION TRANSMITTER (BENCH)................................... Replace Stabilator Position Transmitter (BENCH). ........................................... STABILATOR POSITION TRANSMITTER/LIMIT SWITCH ELECTRICAL CONNECTOR (BENCH)........................................................................... Replace Stabilator Position Transmitter/Limit Switch Electrical Connector (BENCH).............................................................................................................. STABILATOR POSITION TRANSMITTER/LIMIT SWITCH ASSEMBLY (BENCH).............................................................................................................. Replace Mechanical Parts (BENCH). .................................................................

Change 10

2-5-7-1 2-5-8-1 2-5-8-2 2-5-9-1 2-5-9-2 2-5-10-1 2-5-10-1 2-5-11-1 2-5-11-1 2-5-12-1 2-5-12-1 2-5-13-1 2-5-13-2 2-5-14-1 2-5-14-1 2-5-15-1 2-5-15-1 2-5-16-1 2-5-16-1 2-5-17-1 2-5-17-2 2-5-18-1 2-5-18-1 2-5-19-1 2-5-19-2 2-5-19-8 2-5-20-1 2-5-20-1 2-5-21-1 2-5-21-1 2-5-22-1 2-5-22-1 2-5-23-1 2-5-23-1 2-5-24-1 2-5-24-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page Section 2-6 2-6-1 2-6-1.1 2-6-1.2 2-6-1.3 2-6-1.4 2-6-1.5 2-6-1.6 2-6-1.7 2-6-1.8 2-6-1.9 2-6-2 2-6-2.1 2-6-2.2 2-6-2.3 2-6-2.4 2-6-2.5 2-6-2.6 2-6-2.7 2-6-2.8 2-6-2.9 2-6-2.10 2-6-2.11 2-6-2.12 2-6-2.13 2-6-2.14 2-6-2.15 2-6-2.16 2-6-2.17 2-6-2.18 2-6-2.19 2-6-2.20 2-6-2.21 2-6-2.22 2-6-2.23 2-6-2.24 2-6-2.25 2-6-3 2-6-3.1 2-6-3.2 2-6-3.3 2-6-3.4 2-6-3.5 2-6-3.6

STRUCTURAL REPAIR .................................................................................... STRUCTURAL REPAIR GENERAL INFORMATION. .................................. General Information. ............................................................................................ Damage Evaluation. ............................................................................................. Classification of Damage and Types of Repair. ................................................. Cleaning Out Damaged Area............................................................................... Inspection of Damage. ......................................................................................... Fire Damage Evaluation. ..................................................................................... Negligible Damage Limitations........................................................................... Corrosion Protection and Water Integrity Sealing.............................................. Inspection of Camloc Fasteners........................................................................... METAL STRUCTURE REPAIR. ....................................................................... Primary Structure Skin Patch - Non-Flush Patch. .............................................. Primary Structure Skin Patch - Non-Flush Formed Patch. ................................ Secondary Structure Skin Patch. ......................................................................... Riveted Flush Patch Repair. ................................................................................ Temporary Aluminum Tape Patch Repair. ......................................................... Repair Damaged Beaded Section. ....................................................................... Repair Skin Close to a Frame. ............................................................................ Repair Formed and Extruded Angle. .................................................................. Repair Damaged Tee. .......................................................................................... Repair Damaged Former...................................................................................... Repair Damaged Rib............................................................................................ Repair Damaged Channel. ................................................................................... Repair Damaged Zee. .......................................................................................... Repair Damaged Longeron.................................................................................. Repair Damaged Frame. ...................................................................................... Repair Damaged Lightening Holes. .................................................................... Repair Damaged Hat Section. ............................................................................. Repair Damaged Channel Stiffener. .................................................................... Repair Damaged Tee and Web. .......................................................................... Repair Damaged Beam Caps............................................................................... Repair Damaged Skin and Frame. ...................................................................... Repair Damaged Skin and Stringer..................................................................... Repair Damaged Skin, Frame, and Stringer. ...................................................... Repair Damaged Bulkhead Web and Skin. ........................................................ Miscellaneous Repairs. ........................................................................................ COMPOSITE STRUCTURE REPAIR. .............................................................. General. ................................................................................................................ Types of Damage. ................................................................................................ Types of Resin for Repair. .................................................................................. Type I Repairable Damage.................................................................................. Type II Repairable Damage................................................................................. Repair Holes and Attachment Points 0.098-Inch or Less, 12 Plies or Less. ....

Change 10

2-6-1 2-6-1-1 2-6-1-2 2-6-1-2 2-6-1-2 2-6-1-3 2-6-1-4 2-6-1-4 2-6-1-5 2-6-1-10 2-6-1-15 2-6-2-1 2-6-2-2 2-6-2-2 2-6-2-2 2-6-2-2 2-6-2-2 2-6-2-5 2-6-2-5 2-6-2-7 2-6-2-11 2-6-2-13 2-6-2-13 2-6-2-13 2-6-2-13 2-6-2-17 2-6-2-17 2-6-2-17 2-6-2-17 2-6-2-17 2-6-2-19 2-6-2-19 2-6-2-19 2-6-2-21 2-6-2-21 2-6-2-21 2-6-2-21 2-6-3-1 2-6-3-3 2-6-3-4 2-6-3-4 2-6-3-8 2-6-3-8 2-6-3-10

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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TABLE OF CONTENTS (Cont)

Page 2-6-3.7 2-6-3.8 2-6-3.9 2-6-3.10 2-6-3.11 2-6-3.12 2-6-3.13 2-6-3.14 2-6-3.15 2-6-3.16 2-6-3.17 2-6-3.18 2-6-3.19 2-6-3.20 2-6-3.21 2-6-3.22 2-6-3.23 2-6-4 2-6-4.1 2-6-4.2 2-6-4.3 2-6-4.4 2-6-4.5 2-6-4.6 2-6-4.7 2-6-4.8 2-6-4.9 2-6-4.10 2-6-4.11 2-6-4.12 2-6-5 2-6-5.1 2-6-5.2 2-6-5.3 2-6-5.4 2-6-6

V2-xiv

Repair Holes and Attachment Points Over 0.098-Inch, Under 3⁄4-Inch, Thickness 6 Plies or Less. ............................................................................................ Repair Holes and Attachment Points Over 0.098-Inch, Under 3⁄4-Inch, Thickness 7 - 12 Plies................................................................................................... Repair Broken Corner or Tab.............................................................................. Repair Damaged Foam Core Rib, Damage Less Than 2-Inches Long. ............ Repair Damaged Foam Core, Crushed Rib Repair. ........................................... Repair/Replace Mounting Hole In Honeycomb Panel. ...................................... Repair Honeycomb Core - Composite Skin Panel, Damage to Skin Not Penetrating to Honeycomb Core. ........................................................................ Repair Honeycomb Core - Composite Skin Panel, Impact Damage Not Penetrating to Honeycomb Core. ........................................................................ Repair Honeycomb Core - Composite Skin Panel, Damage to One Skin Penetrating Into Honeycomb Core. ..................................................................... Repair Honeycomb Core - Composite Skin Panel, Damage Penetrating Both Skins and Honeycomb Core. ............................................................................... Repair Honeycomb Core - Composite Skin Panel, Skin-to-Core Disbond. ...... Repair Honeycomb Core - Composite Skin Panel, Repair Core Edge.............. Repair Honeycomb Core - Metal Skin Panel, Repair Inner Skin-to-Core Disbond. ..................................................................................................................... Repair Honeycomb Core - Metal Skin Panel, Repair Closeout Disbond.......... Repair Honeycomb Core - Metal Skin Panel, Repair Inner Skin Puncture, Under 1⁄2-Inch....................................................................................................... Repair Honeycomb Core - Metal Skin Panel, Repair Inner Skin Puncture, 1⁄2 - 1 1⁄2-Inches......................................................................................................... Repair Honeycomb Core - Metal Skin Panel, Repair Outer Skin Puncture...... EXTRUSION CHARTS. ..................................................................................... Typical Rivet Spacing - Sheet Metal Substitute................................................. Equal Leg Angle. ................................................................................................. Unequal Leg Angle.............................................................................................. Tee Section........................................................................................................... Unequal Thickness Angle.................................................................................... Tapered Leg Angle. ............................................................................................. Closed Angle Tee................................................................................................. Zee Section........................................................................................................... Channel................................................................................................................. Closed Leg Angle. ............................................................................................... Open Leg Angle................................................................................................... Miscellaneous Shapes. ......................................................................................... HELICOPTER PAINTED SURFACES - TOUCH UP REPAIR...................... Touch Up Helicopter Painted Surfaces. .............................................................. Touch Up Helicopter Conductive Paint. ............................................................. Corrosion Resistant Coating, MIL-C-5541, Class 3........................................... Torque Stripe Application. .................................................................................. NOSE DOOR REPAIR. ......................................................................................

Change 10

2-6-3-11 2-6-3-12 2-6-3-14 2-6-3-14 2-6-3-17 2-6-3-18 2-6-3-19 2-6-3-20 2-6-3-21 2-6-3-23 2-6-3-24 2-6-3-27 2-6-3-29 2-6-3-29 2-6-3-31 2-6-3-32 2-6-3-33 2-6-4-1 2-6-4-1 2-6-4-2 2-6-4-2 2-6-4-2 2-6-4-2 2-6-4-2 2-6-4-2 2-6-4-2 2-6-4-2 2-6-4-2 2-6-4-2 2-6-4-2 2-6-5-1 2-6-5-2 2-6-5-7 2-6-5-7 2-6-5-7 2-6-6-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-6-6.1 2-6-7 2-6-7.1 2-6-8 2-6-8.1 2-6-9 2-6-9.1 2-6-10 2-6-10.1 2-6-10.2 2-6-11 2-6-11.1 2-6-12 2-6-12.1 2-6-12.2 2-6-13 2-6-13.1 2-6-14 2-6-14.1 2-6-15 2-6-15.1 2-6-16 2-6-16.1 2-6-17 2-6-17.1 2-6-18 2-6-18.1 2-6-19 2-6-19.1 2-6-20 2-6-20.1 2-6-21 2-6-21.1 2-6-22 2-6-22.1 2-6-23 2-6-23.1 2-6-24 2-6-24.1 2-6-25 2-6-25.1 2-6-25.2

Repair Nose Door. ............................................................................................... COCKPIT DOOR REPAIR................................................................................. Repair Cockpit Door............................................................................................ NOSE SECTION FRAMING REPAIR. ............................................................. Repair Nose Section Framing.............................................................................. NOSE SECTION PLATING REPAIR. .............................................................. Repair Nose Section Plating................................................................................ CABIN SECTION FORWARD FRAMING REPAIR....................................... Repair Cabin Section Forward Framing. ............................................................ Inspect/Repair Primary Servo Beam Rail Fittings.............................................. CABIN SECTION UPPER FRAMING REPAIR. ............................................. Repair Cabin Section Upper Framing. ................................................................ CABIN SECTION LOWER FRAMING REPAIR............................................. Repair Cabin Section Lower Framing................................................................. Inspect/Repair Drag Beam Support..................................................................... CABIN SECTION PLATING REPAIR. ............................................................ Repair Cabin Section Plating............................................................................... CABIN SECTION BEADED INNER FUSELAGE PLATING - STA 295.0 THROUGH STA 308.0 REPAIR........................................................................ Repair Cabin Section Beaded Inner Fuselage Plating - STA 295.0 through STA 308.0. ........................................................................................................... CABIN DOOR UPPER TRACK REPAIR......................................................... Repair Cabin Door Upper Track. ........................................................................ CABIN DOOR LOWER TRACK FAIRING REPAIR. .................................... Repair Cabin Door Lower Track Fairing............................................................ CABIN DOOR LOWER TRACK WEAR STRIPS REPAIR. .......................... Repair Cabin Door Lower Track Wear Strips.................................................... EXTERNAL POWER RECEPTACLE LATCH, HINGE, AND COVER........ Replace External Power Receptacle Latch, Hinge, and Cover. ......................... RESCUE HOIST AIRFRAME FITTING REPAIR. .......................................... Repair Rescue Hoist Airframe Fitting................................................................. EXTERNAL STORES SUPPORT SYSTEM FUSELAGE FITTING BEARING. ...................................................................................................................... Replace External Stores Support System Fuselage Fitting Bearing. ................. CREW CHIEF’S WINDOW LOWER TRACK................................................. Replace Crew Chief’s Window Lower Track..................................................... CREW CHIEF’S WINDOW LOWER TRACK REPAIR. ................................ Repair Crew Chief’s Window Lower Track....................................................... CREW CHIEF’S WINDOW UPPER TRACK................................................... Replace Crew Chief’s Window Upper Track. .................................................... WINDOW UPPER TRACK FAIRING. ............................................................. Replace Window Upper Track Fairing. .............................................................. CREW CHIEF’S WINDOW REPAIR................................................................ Repair Crew Chief’s Window. ............................................................................ Replace Plastic Window Panels. .........................................................................

Change 10

2-6-6-1 2-6-7-1 2-6-7-1 2-6-8-1 2-6-8-1 2-6-9-1 2-6-9-1 2-6-10-1 2-6-10-2 2-6-10-2 2-6-11-1 2-6-11-1 2-6-12-1 2-6-12-2 2-6-12-2 2-6-13-1 2-6-13-1 2-6-14-1 2-6-14-1 2-6-15-1 2-6-15-1 2-6-16-1 2-6-16-1 2-6-17-1 2-6-17-1 2-6-18-1 2-6-18-1 2-6-19-1 2-6-19-1 2-6-20-1 2-6-20-2 2-6-21-1 2-6-21-1 2-6-22-1 2-6-22-1 2-6-23-1 2-6-23-1 2-6-24-1 2-6-24-1 2-6-25-1 2-6-25-1 2-6-25-6

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

V2-xv

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-6-26 2-6-26.1 2-6-27 2-6-27.1 2-6-27.2 2-6-27.3 2-6-27.4 2-6-27.5 2-6-28 2-6-28.1 2-6-29 2-6-29.1 2-6-30 2-6-30.1 2-6-30.2 2-6-31 2-6-31.1 2-6-32 2-6-32.1 2-6-33 2-6-33.1 2-6-34 2-6-34.1 2-6-35 2-6-35.1 2-6-36 2-6-36.1 2-6-37 2-6-37.1 2-6-38 2-6-38.1 2-6-39 2-6-39.1 2-6-40 2-6-40.1 2-6-41 2-6-41.1 2-6-42 2-6-42.1 2-6-43 2-6-43.1 2-6-43.2 2-6-43.3 2-6-44 V2-xvi

CABIN DOOR REPAIR. .................................................................................... Repair Cabin Door. .............................................................................................. CABIN FLOOR REPAIR.................................................................................... Repair Cabin Floor. ............................................................................................. Repair Cargo Tiedown Rings and Floor Pans. ................................................... Repair Floor Attachment Hardware. ................................................................... Repair Floor Shims. ............................................................................................. Repair Cargo Hook Door..................................................................................... MAIN ROTOR PYLON FRAMING REPAIR................................................... Repair Main Rotor Pylon Framing...................................................................... MAIN ROTOR PYLON FAIRING REPAIR..................................................... Repair Main Rotor Pylon Fairing........................................................................ TRANSITION SECTION FRAMING REPAIR................................................. Transition Section Framing Repair. .................................................................... Inspect/Replace Fuel Cell Liner. ......................................................................... TRANSITION SECTION PLATING REPAIR.................................................. Repair Transition Section Plating........................................................................ TRANSITION SECTION STEP DOOR HINGE - WL 210.0 AND WL 230.0 REPAIR. .................................................................................................... Repair Transition Section Step Door Hinge - WL 210.0 and WL 230.0.......... TRANSITION SECTION STEP DOOR HINGE - WL 250.0. ......................... Replace Transition Section Step Door Hinge - WL 250.0. ............................... TRANSITION SECTION FUEL SUMP DRAIN DOOR.................................. Replace Transition Section Fuel Sump Drain Latch, Hinge, and Door. ........... TRANSITION SECTION GRAVITY REFUEL DOOR. .................................. Replace Transition Section Gravity Refueling Latch, Hinge, and Door. .......... TRANSITION SECTION PRESSURE REFUEL DOOR.................................. Replace Transition Section Pressure Refueling Latch, Hinge, and Door.......... TRANSITION SECTION PNEUMATIC GROUND START DOOR. ............. Replace Pneumatic Ground Start Latch, Hinge, and Door. ............................... TRANSITION SECTION APU ACCESS DOOR SCREWS REPAIR............. Repair Transition Section APU Access Door Screws........................................ GROUNDING RECEPTACLE. .......................................................................... Replace Grounding Receptacle............................................................................ TAIL CONE FRAMING REPAIR. .................................................................... Repair Tail Cone Framing. .................................................................................. TAIL CONE PLATING REPAIR....................................................................... Repair Tail Cone Plating. .................................................................................... TAIL CONE CANTED HINGE BULKHEAD REPAIR................................... Repair Tail Cone Canted Hinge Bulkhead. ........................................................ TAIL ROTOR DRIVE SHAFT COVERS REPAIR.......................................... Repair Tail Rotor Drive Shaft Fairing. ............................................................... Replace Tail Rotor Drive Shaft Fairing Upper Hinge. ...................................... Replace Tail Rotor Drive Shaft Fairing Lower Hinge. ...................................... TAIL ROTOR PYLON FRAMING REPAIR. ................................................... Change 10

2-6-26-1 2-6-26-1 2-6-27-1 2-6-27-1 2-6-27-2 2-6-27-2 2-6-27-2 2-6-27-2 2-6-28-1 2-6-28-2 2-6-29-1 2-6-29-1 2-6-30-1 2-6-30-2 2-6-30-2 2-6-31-1 2-6-31-1 2-6-32-1 2-6-32-1 2-6-33-1 2-6-33-1 2-6-34-1 2-6-34-1 2-6-35-1 2-6-35-1 2-6-36-1 2-6-36-1 2-6-37-1 2-6-37-1 2-6-38-1 2-6-38-1 2-6-39-1 2-6-39-1 2-6-40-1 2-6-40-2 2-6-41-1 2-6-41-1 2-6-42-1 2-6-42-2 2-6-43-1 2-6-43-1 2-6-43-1 2-6-43-3 2-6-44-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 2-6-44.1 2-6-45 2-6-45.1 2-6-46 2-6-46.1 2-6-47 2-6-47.1 2-6-48 2-6-48.1 2-6-49 2-6-49.1 2-6-50 2-6-50.1 2-6-51 2-6-51.1 2-6-52 2-6-52.1 2-6-53 2-6-53.1 2-6-53.2 2-6-54 2-6-54.1 2-6-55 2-6-55.1 2-6-56 2-6-56.1

Repair Tail Rotor Pylon Framing........................................................................ TAIL ROTOR PYLON PLATING REPAIR. .................................................... Repair Tail Rotor Pylon Plating.......................................................................... TAIL ROTOR PYLON LEFT STABILATOR ATTACHMENT FITTING..... Replace Left Stabilator Attachment Fitting Bushings and Bearing. .................. TAIL ROTOR PYLON RIGHT STABILATOR ATTACHMENT FITTING.. Replace Right Stabilator Attachment Fitting Bearings....................................... TAIL ROTOR PYLON STABILATOR ACTUATOR ATTACHMENT FITTING. ................................................................................................................... Replace Tail Rotor Pylon Stabilator Actuator Attachment Fitting. ................... TAIL ROTOR PYLON STABILATOR ACTUATOR ATTACHMENT FITTING BUSHINGS AND BEARING. ................................................................. Replace Tail Rotor Pylon Stabilator Actuator Attachment Fitting Bushings and Bearing. ......................................................................................................... TAIL ROTOR PYLON CABLE PULLEY SUPPORTS REPAIR.................... Repair Tail Rotor Pylon Cable Pulley Supports................................................. TAIL ROTOR PYLON CANTED HINGE FRAME REPAIR. ........................ Repair Tail Rotor Pylon Canted Hinge Frame. .................................................. STABILATOR FRAMING REPAIR.................................................................. Repair Stabilator Framing.................................................................................... STABILATOR PLATING REPAIR. .................................................................. Repair Stabilator Plating...................................................................................... Repair Trailing Edge Beaded Panel. ................................................................... STABILATOR TIP CAP REPAIR. .................................................................... Repair Stabilator Tip Cap.................................................................................... STABILATOR ACTUATOR ATTACHMENT FITTING REPAIR................. Repair Stabilator Actuator Attachment Fitting. .................................................. HIRSS FAIRING REPAIR.................................................................................. Repair HIRSS Fairing Delaminations. ................................................................

Change 10

2-6-44-1 2-6-45-1 2-6-45-1 2-6-46-1 2-6-46-1 2-6-47-1 2-6-47-1 2-6-48-1 2-6-48-1 2-6-49-1 2-6-49-1 2-6-50-1 2-6-50-1 2-6-51-1 2-6-51-1 2-6-52-1 2-6-52-1 2-6-53-1 2-6-53-1 2-6-53-10 2-6-54-1 2-6-54-1 2-6-55-1 2-6-55-1 2-6-56-1 2-6-56-2

V2-xvii/(V2-xviii Blank)

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

VOLUME

3

TABLE OF CONTENTS Page CHAPTER 3

LANDING GEAR................................................................................................

3-1

Section 3-1 3-1-1 3-1-1.1 3-1-1.2 3-1-1.3 3-1-2 3-1-2.1 3-1-3 3-1-3.1 3-1-3.2

EQUIPMENT DESCRIPTION AND DATA ..................................................... LANDING GEAR SYSTEM DESCRIPTION AND DATA............................. Landing Gear System........................................................................................... Main Landing Gear.............................................................................................. Tail Landing Gear................................................................................................ PARKING BRAKE SYSTEM DESCRIPTION AND DATA........................... Parking Brake System.......................................................................................... TAILWHEEL LOCK SYSTEM DESCRIPTION AND DATA........................ Tailwheel Lock System Overview. ..................................................................... Tailwheel Lock System. ......................................................................................

3-1-1 3-1-1-1 3-1-1-1 3-1-1-1 3-1-1-1 3-1-2-1 3-1-2-1 3-1-3-1 3-1-3-1 3-1-3-1

Section 3-2 3-2-1 3-2-2

TROUBLESHOOTING ....................................................................................... PARKING BRAKE SYSTEM. ........................................................................... TAILWHEEL LOCK SYSTEM..........................................................................

3-2-1 3-2-1-1 3-2-2-1

Section 3-3 3-3-1 3-3-1.1 3-3-1.2 3-3-2

3-3-1 3-3-1-1 3-3-1-1 3-3-1-4

3-3-2.1 3-3-3 3-3-3.1 3-3-4 3-3-4.1 3-3-5 3-3-5.1 3-3-6 3-3-6.1 3-3-7 3-3-7.1

ON AIRCRAFT INSPECTIONS ........................................................................ MAIN LANDING GEAR DRAG BEAM AND AXLE INSPECTION. ......... Main Landing Gear Drag Beam Inspection........................................................ Main Landing Gear Axle Inspection................................................................... MAIN LANDING GEAR INSPECTION SHOCK STRUT QUICK SERVICE CHECK. ............................................................................................. Main Landing Gear Shock Strut Quick Service Check. .................................... MAIN LANDING GEAR TIRE INSPECTION. .............................................. Main Landing Gear Tire Inspection.................................................................... MAIN LANDING GEAR WHEEL BRAKE INSPECTION. .......................... Main Landing Gear Wheel Brake Inspection. .................................................... PARKING BRAKE ROD INSPECTION. .......................................................... Parking Brake Rod Inspection............................................................................. TAIL LANDING GEAR YOKE INSPECTION. ............................................... Tail Landing Gear Yoke Inspection.................................................................... TAIL LANDING GEAR TIRE INSPECTION. ................................................. Tail Landing Gear Tire Inspection......................................................................

3-3-2-1 3-3-2-1 3-3-3-1 3-3-3-1 3-3-4-1 3-3-4-1 3-3-5-1 3-3-5-1 3-3-6-1 3-3-6-1 3-3-7-1 3-3-7-1

Section 3-4 3-4-1 3-4-1.1

MAINTENANCE PROCEDURES .................................................................... MAIN LANDING GEAR DRAG BEAM/AXLE. ............................................. Replace Main Landing Gear Drag Beam/Axle...................................................

3-4-1 3-4-1-1 3-4-1-2

Change 10 This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

V3-i

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 3-4-2 3-4-2.1 3-4-3 3-4-3.1 3-4-4 3-4-4.1 3-4-5 3-4-5.1 3-4-6 3-4-6.1 3-4-6.2 3-4-7 3-4-7.1 3-4-7.2 3-4-8 3-4-8.1 3-4-8.2 3-4-9 3-4-9.1 3-4-10 3-4-10.1 3-4-11 3-4-11.1 3-4-12 3-4-12.1 3-4-13 3-4-13.1 3-4-14 3-4-14.1 3-4-15 3-4-15.1 3-4-16 3-4-16.1 3-4-17 3-4-17.1 3-4-18 3-4-18.1 3-4-19 3-4-19.1 3-4-20 3-4-20.1 3-4-21 3-4-21.1

V3-ii

MAIN LANDING GEAR AXLE........................................................................ Replace Main Landing Gear Axle....................................................................... BRAKE FLANGE SPACERS............................................................................. Replace Brake Flange Spacers. ........................................................................... DRAG BEAM SUPPORT FITTING BEARINGS............................................. Replace Drag Beam Support Fitting Bearings.................................................... MAIN LANDING GEAR DRAG BEAM JACKPAD AND TIEDOWN RING. ................................................................................................................... Replace Main Landing Gear Drag Beam Jackpad and Tiedown Ring.............. MAIN LANDING GEAR DRAG BEAM SWITCH. ........................................ Replace Main Landing Gear Drag Beam Switch. .............................................. Adjust Main Landing Gear Drag Beam Switch. ................................................ MAIN LANDING GEAR SHOCK STRUT. .................................................... Replace Main Landing Gear Shock Strut. .......................................................... Repair Main Landing Gear Shock Strut. ............................................................ MAIN LANDING GEAR SHOCK STRUT KNEELING VALVE. ................ Replace Main Landing Gear Shock Strut Kneeling Valve. ............................... Repair Main Landing Gear Shock Strut Kneeling Valve................................... MAIN LANDING GEAR SHOCK STRUT AIR VALVE. ............................. Replace Main Landing Gear Shock Strut Air Valve.......................................... MAIN LANDING GEAR WHEEL AND TIRE. ............................................... Replace Main Landing Gear Wheel and Tire..................................................... MAIN LANDING GEAR WHEEL VALVE. .................................................... Replace Main Landing Gear Wheel Valve. ........................................................ MAIN LANDING GEAR WHEEL DISC DRIVE KEYS................................. Replace Main Landing Gear Wheel Disc Drive Keys. ...................................... MAIN LANDING GEAR TIRE. ........................................................................ Replace Main Landing Gear Tire........................................................................ MAIN LANDING GEAR WHEEL BRAKE. .................................................... Replace Main Landing Gear Wheel Brake. ........................................................ MASTER BRAKE CYLINDER. ........................................................................ Replace Master Brake Cylinder........................................................................... MAIN LANDING GEAR WHEEL BRAKE LINES AND HOSES................. Replace Main Landing Gear Wheel Brake Lines and Hoses............................. PARKING BRAKE VALVE............................................................................... Replace Parking Brake Valve.............................................................................. PARKING BRAKE VALVE SWITCH.............................................................. Replace Parking Brake Valve Switch. ................................................................ SLAVE MIXER VALVE. ................................................................................... Replace Slave Mixer Valve. ................................................................................ BLEED MAIN LANDING GEAR WHEEL BRAKE SYSTEM. .................... Bleed Main Landing Gear Wheel Brake System. .............................................. PARKING BRAKE HANDLE AND MECHANISM. ...................................... Replace Parking Brake Handle and Mechanism, 70250-01002-011..................

Change 10

3-4-2-1 3-4-2-1 3-4-3-1 3-4-3-1 3-4-4-1 3-4-4-1 3-4-5-1 3-4-5-1 3-4-6-1 3-4-6-1 3-4-6-5 3-4-7-1 3-4-7-1 3-4-7-5 3-4-8-1 3-4-8-1 3-4-8-3 3-4-9-1 3-4-9-1 3-4-10-1 3-4-10-1 3-4-11-1 3-4-11-1 3-4-12-1 3-4-12-1 3-4-13-1 3-4-13-1 3-4-14-1 3-4-14-2 3-4-15-1 3-4-15-1 3-4-16-1 3-4-16-1 3-4-17-1 3-4-17-1 3-4-18-1 3-4-18-1 3-4-19-1 3-4-19-1 3-4-20-1 3-4-20-2 3-4-21-1 3-4-21-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 3-4-21.2 3-4-22 3-4-22.1 3-4-22.2 3-4-23 3-4-23.1 3-4-23.2 3-4-24 3-4-24.1 3-4-25 3-4-25.1 3-4-25.2 3-4-25.3 3-4-25.4 3-4-25.5 3-4-25.6 3-4-26 3-4-26.1 3-4-26.2 3-4-26.3 3-4-26.4 3-4-27 3-4-27.1 3-4-27.2 3-4-28 3-4-28.1 3-4-28.2 Section 3-5 3-5-1 3-5-1.1 3-5-2 3-5-2.1 3-5-3 3-5-3.1 3-5-3.2 3-5-4 3-5-4.1 3-5-5 3-5-5.1 3-5-5.2 3-5-6

Replace Parking Brake Handle and Mechanism, 70209-84101-013 and 70209-84101-014. ............................................................................................... TAIL LANDING GEAR SHOCK STRUT. ...................................................... Replace Tail Landing Gear Shock Strut. ............................................................ Repair Tail Landing Gear Shock Strut. .............................................................. TAIL LANDING GEAR SHOCK STRUT KNEELING VALVE. .................. Replace Tail Landing Gear Shock Strut Kneeling Valve. ................................. Repair Tail Landing Gear Shock Strut Kneeling Valve..................................... TAIL LANDING GEAR SHOCK STRUT AIR VALVE. ............................... Replace Tail Landing Gear Shock Strut Air Valve............................................ TAIL LANDING GEAR YOKE......................................................................... Replace Tail Landing Gear Yoke........................................................................ Adjust Tailwheel Locked/Unlocked Switches. ................................................... Replace Shock Strut Attachment Fitting............................................................. Replace Tail Landing Gear Yoke Lockpin Bushing. ......................................... Replace Teflon-Coated Washers.......................................................................... Replace Teflon-Coated Sleeves. .......................................................................... TAIL LANDING GEAR FORK. ........................................................................ Replace Tail Landing Gear Fork......................................................................... Replace Lockpin Bushing and Jackpad............................................................... Replace Teflon-Coated Wear Plate. .................................................................... Replace Axle Bushings........................................................................................ TAIL LANDING GEAR LOCK MECHANISM. .............................................. Replace Lock Actuator. ....................................................................................... Replace Lock Mechanism.................................................................................... TAIL LANDING GEAR WHEEL AND TIRE.................................................. Replace Tail Landing Gear Axle, Wheel, and Tire............................................ Replace Tail Landing Gear Tire/Tube. ............................................................... MAINTENANCE PROCEDURES (BENCH).................................................... MAIN LANDING GEAR SHOCK STRUT (BENCH). .................................... Repair Main Landing Gear Shock Strut (BENCH)............................................ MAIN LANDING GEAR SHOCK STRUT LOWER STAGE SPHERICAL BEARING (BENCH)........................................................................................... Replace Main Landing Gear Shock Strut Lower Stage Spherical Bearing (BENCH).............................................................................................................. MAIN LANDING GEAR WHEEL (BENCH)................................................... Repair Main Landing Gear Wheel (BENCH)..................................................... Replace Bearing Cups (BENCH). ....................................................................... MAIN LANDING GEAR WHEEL BRAKE (BENCH).................................... Main Landing Gear Wheel Brake Repair (BENCH).......................................... MASTER BRAKE CYLINDER (BENCH)........................................................ Repair Master Brake Cylinder (BENCH). .......................................................... Test Master Brake Cylinder (BENCH). .............................................................. PARKING BRAKE VALVE (BENCH). ............................................................

Change 10

3-4-21-2 3-4-22-1 3-4-22-2 3-4-22-5 3-4-23-1 3-4-23-1 3-4-23-2 3-4-24-1 3-4-24-1 3-4-25-1 3-4-25-2 3-4-25-7 3-4-25-8 3-4-25-11 3-4-25-12 3-4-25-12 3-4-26-1 3-4-26-2 3-4-26-6 3-4-26-8 3-4-26-9 3-4-27-1 3-4-27-1 3-4-27-3 3-4-28-1 3-4-28-2 3-4-28-5 3-5-1 3-5-1-1 3-5-1-2 3-5-2-1 3-5-2-2 3-5-3-1 3-5-3-2 3-5-3-6 3-5-4-1 3-5-4-2 3-5-5-1 3-5-5-1 3-5-5-5 3-5-6-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

V3-iii

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 3-5-6.1 3-5-6.2 3-5-7 3-5-7.1 3-5-7.2 3-5-8 3-5-8.1 3-5-8.2 3-5-9 3-5-9.1 3-5-9.2 3-5-9.3 3-5-10 3-5-10.1 3-5-11 3-5-11.1 3-5-11.2

Repair Parking Brake Valve (BENCH). ............................................................. Test Parking Brake Valve (BENCH). ................................................................. SLAVE MIXER VALVE (BENCH)................................................................... Repair Slave Mixer Valve (BENCH).................................................................. Test Slave Mixer Valve (BENCH). .................................................................... TAIL LANDING GEAR SHOCK STRUT (BENCH)....................................... Repair Tail Landing Gear Shock Strut (BENCH).............................................. Replace Tail Landing Gear Shock Strut Spherical Bearings (BENCH)............ TAIL LANDING GEAR YOKE (BENCH). ...................................................... Replace Yoke Attachment Bushings (BENCH). ................................................ Replace Fuselage/Yoke Fitting Bushings (BENCH). ......................................... Replace Inserts, Studs, and Lockrings (BENCH)............................................... TAIL LANDING GEAR FORK (BENCH)........................................................ Repair Fork Assembly Lockpin Bushing Hole (BENCH). ................................ TAIL LANDING GEAR WHEEL (BENCH). .................................................. Repair Tail Landing Gear Wheel (BENCH)....................................................... Replace Wheel Bearing Cup (BENCH)..............................................................

3-5-6-1 3-5-6-6 3-5-7-1 3-5-7-1 3-5-7-3 3-5-8-1 3-5-8-2 3-5-8-13 3-5-9-1 3-5-9-2 3-5-9-2 3-5-9-4 3-5-10-1 3-5-10-1 3-5-11-1 3-5-11-1 3-5-11-5

CHAPTER 4

ENGINE SYSTEM ..............................................................................................

4-1

Section 4-1 4-1-1 4-1-1.1 4-1-1.2 4-1-1.3 4-1-1.4 4-1-2 4-1-2.1 4-1-2.2 4-1-2.3 4-1-2.4 4-1-3

EQUIPMENT DESCRIPTION AND DATA ..................................................... POWERPLANT DESCRIPTION AND DATA. ................................................ Powerplant System............................................................................................... Demountable Power Package. ............................................................................. Engine................................................................................................................... Engine Mounts. .................................................................................................... ENGINE CONTROL SYSTEM DESCRIPTION AND DATA. ....................... Load-Demand System.......................................................................................... Power Control System. ........................................................................................ Speed Control System.......................................................................................... Engine Controls Quadrant. .................................................................................. ENGINE START AND IGNITION SYSTEM DESCRIPTION AND DATA. .................................................................................................................. Engine Start and Ignition System........................................................................ Engine Starting..................................................................................................... ENGINE SPEED GOVERNING SYSTEMS DESCRIPTION AND DATA. .. Engine Speed Trim System. ................................................................................ Engine Overspeed Protection System. ................................................................ ENGINE INDICATING SYSTEMS DESCRIPTION AND DATA. ................ Engine Indicating Systems................................................................................... ENGINE WARNING SYSTEMS DESCRIPTION AND DATA. .................... Engine Warning Systems..................................................................................... Fuel Pressure Warning System............................................................................ Fuel Filter Bypass Warning System.................................................................... Oil Pressure Warning System..............................................................................

4-1-1 4-1-1-1 4-1-1-1 4-1-1-1 4-1-1-1 4-1-1-3 4-1-2-1 4-1-2-1 4-1-2-1 4-1-2-1 4-1-2-1

4-1-3.1 4-1-3.2 4-1-4 4-1-4.1 4-1-4.2 4-1-5 4-1-5.1 4-1-6 4-1-6.1 4-1-6.2 4-1-6.3 4-1-6.4 V3-iv

Change 10

4-1-3-1 4-1-3-1 4-1-3-1 4-1-4-1 4-1-4-1 4-1-4-1 4-1-5-1 4-1-5-1 4-1-6-1 4-1-6-1 4-1-6-1 4-1-6-1 4-1-6-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 4-1-6.5 4-1-6.6 4-1-6.7 4-1-7 4-1-7.1 4-1-8 4-1-8.1

Oil Temperature Warning System....................................................................... Oil Filter Bypass Warning System...................................................................... Chip Detector Warning System........................................................................... HOVER INFRARED SUPPRESSION SYSTEM (HIRSS) DESCRIPTION AND DATA. ........................................................................................................ Hover Infrared Suppression System (HIRSS)..................................................... ENGINE ANTI-ICE SYSTEM DESCRIPTION AND DATA.......................... Engine Anti-Ice System. ......................................................................................

4-1-6-1 4-1-6-1 4-1-6-2 4-1-7-1 4-1-7-1 4-1-8-1 4-1-8-1

Section 4-2 4-2-1 4-2-2 4-2-2.1 4-2-3 4-2-3.1 4-2-4 4-2-4.1 4-2-5 4-2-5.1 4-2-6 4-2-6.1 4-2-6.2 4-2-7 4-2-7.1 4-2-7.2 4-2-8 4-2-8.1 4-2-8.2 4-2-9 4-2-9.1

TROUBLESHOOTING ....................................................................................... ENGINE AND ENGINE INTERFACE.............................................................. NO. 1 ENGINE INSTRUMENTS AND WARNING LIGHTS SYSTEM. ...... Operational/Troubleshooting Procedure. ............................................................. NO. 2 ENGINE INSTRUMENTS AND WARNING LIGHTS SYSTEM. ...... Operational/Troubleshooting Procedure. ............................................................. ENGINE OVERSPEED PROTECTION SYSTEM. .......................................... Operational/Troubleshooting Procedure. ............................................................. ENGINE SPEED TRIM SYSTEM. .................................................................... Operational/Troubleshooting Procedure. ............................................................. ENGINE CHIP DETECTOR SYSTEM. ............................................................ Engine No. 1. ....................................................................................................... Engine No. 2. ....................................................................................................... ENGINE ANTI-ICE SYSTEM. .......................................................................... No. 1 Engine. ....................................................................................................... No. 2 Engine. ....................................................................................................... ENGINE START AND IGNITION SYSTEM................................................... No. 1 Engine. ....................................................................................................... No. 2 Engine. ....................................................................................................... ENGINE CONTROLS QUADRANT (BENCH). .............................................. Operational/Troubleshooting Procedure. .............................................................

4-2-1 4-2-1-1 4-2-2-1 4-2-2-1 4-2-3-1 4-2-3-1 4-2-4-1 4-2-4-1 4-2-5-1 4-2-5-1 4-2-6-1 4-2-6-1 4-2-6-2 4-2-7-1 4-2-7-1 4-2-7-2 4-2-8-1 4-2-8-1 4-2-8-3 4-2-9-1 4-2-9-1

Section 4-3 4-3-1 4-3-1.1 4-3-2 4-3-2.1 4-3-3 4-3-3.1

ON AIRCRAFT INSPECTIONS ........................................................................ ENGINE EXHAUST MODULE AND EJECTOR INSPECTION.................... Engine Exhaust Module and Ejector Inspection................................................. ENGINE CONTROL PUSH/PULL CABLE INSPECTION. ............................ Engine Control Push/Pull Cable Inspection........................................................ ENGINE LOAD-DEMAND PUSH/PULL CABLE FRICTION CHECK. ....... Engine Load-Demand Push/Pull Cable Friction Check. ....................................

4-3-1 4-3-1-1 4-3-1-1 4-3-2-1 4-3-2-1 4-3-3-1 4-3-3-1

Section 4-4 4-4-1 4-4-1.1 4-4-2 4-4-2.1 4-4-2.2

MAINTENANCE PROCEDURES ..................................................................... ENGINE. .............................................................................................................. Replace Engine..................................................................................................... DEMOUNTABLE POWER PACKAGE. ........................................................... Tear Down Power Package. ................................................................................ Build Up Power Package.....................................................................................

4-4-1 4-4-1-1 4-4-1-2 4-4-2-1 4-4-2-1 4-4-2-8

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TABLE OF CONTENTS (Cont)

Page 4-4-2.3 4-4-3 4-4-3.1 4-4-4 4-4-4.1 4-4-5 4-4-5.1 4-4-6 4-4-6.1 4-4-7 4-4-7.1 4-4-8 4-4-8.1 4-4-9 4-4-9.1 4-4-10 4-4-10.1 4-4-10.2 4-4-11 4-4-11.1 4-4-12 4-4-12.1 4-4-13 4-4-13.1 4-4-13.2 4-4-14 4-4-14.1 4-4-15 4-4-15.1 4-4-15.2 4-4-16 4-4-16.1 4-4-17 4-4-17.1 4-4-18 4-4-18.1 4-4-19 4-4-19.1 4-4-20 4-4-20.1 4-4-21 4-4-21.1 4-4-21.2 4-4-22

V3-vi

Quick Engine Change (QEC). ............................................................................. ENGINE LINE REPLACEABLE UNITS (LRUs)............................................. Replace Engine Line Replacement Units (LRUs). ............................................. ENGINE AIR INLET. ......................................................................................... Replace Engine Air Inlet. .................................................................................... AFT ENGINE MOUNTS. ................................................................................... Replace Aft Engine Mounts. ............................................................................... FORWARD SUPPORT TUBE/ENGINE OUTPUT SHAFT. ........................... Replace Forward Support Tube/Engine Output Shaft. ....................................... ENGINE EXHAUST MODULE. ...................................................................... Replace Engine Exhaust Module......................................................................... ENGINE EXHAUST MODULE EJECTOR. ..................................................... Replace Engine Exhaust Module Ejector............................................................ HIRSS................................................................................................................... Replace HIRSS. ................................................................................................... HIRSS REAR FAIRINGS AND PANELS......................................................... Replace HIRSS Rear Fairings and Panels. ......................................................... Repair HIRSS Rear Fairings and Panels............................................................. HIRSS SUPPRESSOR SUPPORT MOUNTS.................................................... Replace HIRSS Suppressor Support Mounts...................................................... HIRSS NACELLE FAIRING SUPPORT MOUNTS......................................... Replace HIRSS Nacelle Fairing Support Mounts............................................... HIRSS NACELLE FAIRING.............................................................................. Replace HIRSS Nacelle Fairing. ......................................................................... Repair HIRSS Nacelle Fairing. ........................................................................... HIRSS SUPPRESSOR CORE AND BAFFLE. ................................................ Replace HIRSS Suppressor Core and Baffle. ..................................................... HIRSS EXTENDER. .......................................................................................... Replace HIRSS Extender..................................................................................... Repair HIRSS Extender. ...................................................................................... HIRSS BULKHEAD REPAIR............................................................................ Repair HIRSS Bulkhead. ..................................................................................... HIRSS EMISSIVE COATING REPAIR. ........................................................... Repair HIRSS Emissive Coating......................................................................... LOAD-DEMAND ROTARY INPUT. ................................................................ Replace Load-Demand Rotary Input................................................................... POWER-AVAILABLE ROTARY INPUT. ........................................................ Replace Power-Available Rotary Input............................................................... ENGINE SPEED CONTROL POTENTIOMETER. ......................................... Replace Engine Speed Control Potentiometer. ................................................... ENGINE CONTROL QUADRANT. ................................................................. Replace Engine Control Quadrant....................................................................... Adjust Secondary Stop Blocks. ........................................................................... ENGINE CONTROL QUADRANT CANOPY PLUNGER. ...........................

Change 10

4-4-2-11 4-4-3-1 4-4-3-1 4-4-4-1 4-4-4-1 4-4-5-1 4-4-5-2 4-4-6-1 4-4-6-2 4-4-7-1 4-4-7-1 4-4-8-1 4-4-8-1 4-4-9-1 4-4-9-2 4-4-10-1 4-4-10-1 4-4-10-3 4-4-11-1 4-4-11-1 4-4-12-1 4-4-12-1 4-4-13-1 4-4-13-1 4-4-13-2 4-4-14-1 4-4-14-1 4-4-15-1 4-4-15-1 4-4-15-5 4-4-16-1 4-4-16-1 4-4-17-1 4-4-17-1 4-4-18-1 4-4-18-1 4-4-19-1 4-4-19-1 4-4-20-1 4-4-20-1 4-4-21-1 4-4-21-1 4-4-21-5 4-4-22-1

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TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 4-4-22.1 4-4-23 4-4-23.1 4-4-24 4-4-24.1 4-4-25 4-4-25.1 4-4-26 4-4-26.1 4-4-27 4-4-27.1 4-4-28 4-4-28.1 4-4-29 4-4-29.1 4-4-30 4-4-30.1 4-4-31 4-4-31.1 4-4-32 4-4-32.1 4-4-33

4-4-22-1 4-4-23-1 4-4-23-1 4-4-24-1 4-4-24-1 4-4-25-1 4-4-25-1 4-4-26-1 4-4-26-1 4-4-27-1 4-4-27-1 4-4-28-1 4-4-28-1 4-4-29-1 4-4-29-1 4-4-30-1 4-4-30-1 4-4-31-1 4-4-31-1 4-4-32-1 4-4-32-1

4-4-33.1 4-4-34 4-4-34.1

Replace/Adjust Engine Control Quadrant Canopy Plunger. .............................. ENGINE STARTER SWITCH ADJUSTMENT................................................ Adjust Engine Starter Switch. ............................................................................. ROTOR BRAKE SOLENOID. .......................................................................... Replace Rotor Brake Solenoid. ........................................................................... ENGINE STARTER ABORT SWITCH ADJUSTMENT. ................................ Adjust Engine Starter Abort Switch.................................................................... ENGINE STARTER OVERRIDE SWITCH ADJUSTMENT. ........................ Adjust Engine Starter Override Switch............................................................... ENGINE LOAD-DEMAND PUSH/PULL CABLE........................................... Replace Engine Load-Demand Push/Pull Cable................................................. ENGINE POWER-AVAILABLE PUSH/PULL CABLE................................... Replace Engine Power-Available Push/Pull Cable............................................. FUSELAGE POWER-AVAILABLE PUSH/PULL CABLE. ............................ Replace Fuselage Power-Available Push/Pull Cable.......................................... FUEL SELECTOR VALVE PUSH/PULL CABLE........................................... Replace Fuel Selector Valve Push/Pull Cable. ................................................... FUEL SELECTOR VALVE CONTROL BOX.................................................. Replace Fuel Selector Valve Control Box.......................................................... ENGINE LOAD-DEMAND PUSH/PULL CABLE SUPPORTS...................... Replace Engine Load-Demand Push/Pull Cable Supports. ................................ ENGINE POWER-AVAILABLE SYSTEM RIGGING AND ADJUSTMENT................................................................................................................... Rig and Adjust Engine Power-Available System. .............................................. ENGINE MOUNT RESTRAINER RINGS........................................................ Replace Engine Mount Restrainer Rings. ...........................................................

Section 4-5 4-5-1 4-5-1.1 4-5-2 4-5-2.1 4-5-3 4-5-3.1 4-5-4 4-5-4.1 4-5-5 4-5-5.1 4-5-6 4-5-6.1 4-5-7 4-5-7.1 4-5-8 4-5-8.1 4-5-9

MAINTENANCE PROCEDURES (BENCH).................................................... AFT ENGINE MOUNT STRUTS (BENCH)..................................................... Repair Aft Engine Mount Struts (BENCH)........................................................ AFT ENGINE MOUNT FITTINGS (BENCH).................................................. Repair Aft Engine Mount Fittings (BENCH). .................................................... AFT ENGINE MOUNT LINKS (BENCH). ..................................................... Repair Aft Engine Mount Links (BENCH). ....................................................... AFT ENGINE MOUNT SUPPORTS (BENCH)................................................ Repair Aft Engine Mount Supports (BENCH). .................................................. ENGINE MOUNT CROTCH ASSEMBLY (BENCH). .................................... Repair Engine Mount Crotch Assembly (BENCH)............................................ ENGINE EXHAUST EJECTOR AND FAIRINGS (BENCH). ........................ Repair Engine Exhaust Ejector and Fairings (BENCH)..................................... ENGINE EXHAUST MODULE DUCT ASSEMBLY (BENCH). .................. Replace Engine Exhaust Module Duct Assembly (BENCH)............................. HIRSS INLET SEAL (BENCH). ....................................................................... Replace HIRSS Inlet Seal (BENCH). ................................................................. ROTARY INPUT (BENCH). ..............................................................................

4-5-1 4-5-1-1 4-5-1-2 4-5-2-1 4-5-2-1 4-5-3-1 4-5-3-1 4-5-4-1 4-5-4-1 4-5-5-1 4-5-5-1 4-5-6-1 4-5-6-1 4-5-7-1 4-5-7-1 4-5-8-1 4-5-8-1 4-5-9-1

Change 10

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Page 4-5-9.1 4-5-10 4-5-10.1 4-5-11 4-5-11.1 4-5-12 4-5-12.1 4-5-13 4-5-13.1 4-5-14 4-5-14.1 4-5-15 4-5-15.1 4-5-16 4-5-16.1 4-5-17 4-5-17.1 4-5-18 4-5-18.1 4-5-19 4-5-19.1

Repair Rotary Input (BENCH)............................................................................ ENGINE CONTROL QUADRANT POWER LEVER (BENCH). ................... Replace Engine Control Quadrant Power Lever (BENCH). .............................. ENGINE CONTROL QUADRANT T-HANDLE AND FUEL LEVER (BENCH).............................................................................................................. Replace Engine Control Quadrant T-Handle and Fuel Lever (BENCH). ......... ENGINE CONTROL QUADRANT THREADED INSERTS (BENCH). ........ Replace Engine Control Quadrant Threaded Inserts (BENCH)......................... ENGINE CONTROL QUADRANT ENGINE STARTER SWITCH (BENCH).............................................................................................................. Replace Engine Control Quadrant Engine Starter Switch (BENCH). ............... ENGINE CONTROL QUADRANT STARTER ABORT SWITCH (BENCH).............................................................................................................. Replace Engine Control Quadrant Starter Abort Switch (BENCH). ................. ENGINE CONTROL QUADRANT STARTER OVERRIDE SWITCH (BENCH).............................................................................................................. Replace Engine Control Quadrant Starter Override Switch (BENCH). ............ ENGINE CONTROL QUADRANT FIRE EXTINGUISHER ARMING SWITCH (BENCH). ............................................................................................ Replace Engine Control Quadrant Fire Extinguisher Arming Switch (BENCH).............................................................................................................. ENGINE CONTROL QUADRANT FRONT COVER INFORMATION PLATE (BENCH). ............................................................................................... Replace Engine Control Quadrant Front Cover Information Plate (BENCH). . ENGINE CONTROL QUADRANT LEFT AND RIGHT COVER INFORMATION PLATES (BENCH)................................................................. Replace Engine Control Quadrant Left and Right Cover Information Plates (BENCH).............................................................................................................. ENGINE CONTROL QUADRANT FRONT COVER INFORMATION PLATE WIRING HARNESS (BENCH). ........................................................... Replace Engine Control Quadrant Front Cover Information Plate Wiring Harness (BENCH)................................................................................................

4-5-9-1 4-5-10-1 4-5-10-1 4-5-11-1 4-5-11-1 4-5-12-1 4-5-12-1 4-5-13-1 4-5-13-1 4-5-14-1 4-5-14-1 4-5-15-1 4-5-15-1 4-5-16-1 4-5-16-1 4-5-17-1 4-5-17-1 4-5-18-1 4-5-18-1 4-5-19-1 4-5-19-1

CHAPTER 5

ROTOR SYSTEM ...............................................................................................

5-1

Section 5-1 5-1-1 5-1-1.1 5-1-1.2 5-1-1.3 5-1-1.4 5-1-1.5 5-1-1.6 5-1-1.7 5-1-1.8

EQUIPMENT DESCRIPTION AND DATA ..................................................... MAIN ROTOR SYSTEM DESCRIPTION AND DATA.................................. Main Rotor Blade. ............................................................................................... Blade Inspection Method (BIMt) Pressure Indicator......................................... Main Rotor Head. ................................................................................................ Main Rotor Hub. .................................................................................................. Antiflapping Assemblies. ..................................................................................... Droop Stops.......................................................................................................... Lead Stops............................................................................................................ Pitch Control Rods...............................................................................................

5-1-1 5-1-1-1 5-1-1-1 5-1-1-1 5-1-1-1 5-1-1-1 5-1-1-1 5-1-1-2 5-1-1-2 5-1-1-2

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TABLE OF CONTENTS (Cont)

Page 5-1-1.9 5-1-1.10 5-1-1.11 5-1-2 5-1-2.1 5-1-2.2 5-1-2.3

Damper Indicators................................................................................................ Bifilar Vibration Absorber. .................................................................................. Swashplate............................................................................................................ TAIL ROTOR SYSTEM DESCRIPTION AND DATA. .................................. System Description. ............................................................................................. Principles Of Operation. ...................................................................................... Component Description. ......................................................................................

5-1-1-2 5-1-1-2 5-1-1-2 5-1-2-1 5-1-2-1 5-1-2-1 5-1-2-1

Section 5-2 5-2-1 5-2-2

TROUBLESHOOTING ....................................................................................... BIMt INDICATORS........................................................................................... MAIN ROTOR BLADES (BENCH). .................................................................

5-2-1 5-2-1-1 5-2-2-1

Section 5-3 5-3-1 5-3-1.1 5-3-1.2 5-3-2 5-3-2.1 5-3-3 5-3-3.1 5-3-4 5-3-4.1 5-3-4.2 5-3-4.3 5-3-5 5-3-5.1 5-3-5.2 5-3-5.3 5-3-5.4 5-3-6 5-3-6.1 5-3-6.2 5-3-6.3 5-3-6.4 5-3-6.5 5-3-6.6 5-3-7 5-3-7.1 5-3-8 5-3-8.1 5-3-8.2

ON AIRCRAFT INSPECTIONS ........................................................................ SPINDLE INSPECTIONS................................................................................... Spindle Inspections. ............................................................................................. Elastomeric Bearing Assembly Inspection.......................................................... SPINDLE HORN INSPECTION. ....................................................................... Spindle Horn Inspection. ..................................................................................... DROOP STOP INSPECTION............................................................................. Droop Stop Inspection. ........................................................................................ DAMPER INSPECTIONS. ................................................................................. Damper Indicator Inspection. .............................................................................. Damper Leakage Inspection. ............................................................................... Damper Bearing Inspection. ................................................................................ PITCH CONTROL ROD INSPECTIONS.......................................................... Rod End Spherical and ElastomericBearing Surfaces Inspection...................... Rod End Elastomeric Bearing Feeler Gage Wear Inspection. ........................... Rod End Spherical Bearing Feeler Gage Wear Inspection. ............................... Pitch Control Rod Movement Inspection............................................................ SWASHPLATE INSPECTIONS......................................................................... Swashplate Large Spherical Bearing Inspection................................................. Swashplate Large Spherical Bearing Inner Race Inspection.............................. Swashplate Large Spherical Bearing Outer Race Inspection. ............................ Ball Bearings between Stationary and Rotating Swashplate Inspection............ Swashplate Scissors Attachment Spherical Bearing Inspection. ........................ Swashplate Expandable Pin Nuts Inspection. ..................................................... ROTATING SCISSORS UPPER LINK BEARING INSPECTION. ................ Rotating Scissors Upper Link Bearings Inspection. ........................................... MAIN ROTOR BLADE SPAR INSPECTIONS................................................ Main Rotor Blade Spar Pressure Inspection (Using Checking Unit). ............... Main Rotor Blade Spar Pressure Inspection (Using BIMt Check and Fill Unit)...................................................................................................................... MAIN ROTOR BLADE PIN INSPECTION. .................................................... Main Rotor Blade Expandable Pin Inspection.................................................... Main Rotor Blade Solid Pin Inspection. .............................................................

5-3-1 5-3-1-1 5-3-1-1 5-3-1-3 5-3-2-1 5-3-2-1 5-3-3-1 5-3-3-1 5-3-4-1 5-3-4-1 5-3-4-2 5-3-4-2 5-3-5-1 5-3-5-1 5-3-5-3 5-3-5-3 5-3-5-5 5-3-6-1 5-3-6-2 5-3-6-2 5-3-6-2 5-3-6-3 5-3-6-4 5-3-6-4 5-3-7-1 5-3-7-1 5-3-8-1 5-3-8-2

5-3-9 5-3-9.1 5-3-9.2

Change 10

5-3-8-4 5-3-9-1 5-3-9-2 5-3-9-7

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Page 5-3-10 5-3-10.1 5-3-11 5-3-11.1 5-3-11.2 5-3-11.3 5-3-11.4 5-3-11.5 5-3-11.6 5-3-11.7 5-3-11.8 5-3-11.9 5-3-11.10 5-3-11.11 5-3-12 5-3-12.1 5-3-12.2 5-3-13 5-3-13.1 5-3-13.2 5-3-13.3 5-3-13.4 5-3-13.5 5-3-13.6 5-3-13.7 Section 5-4 5-4-1 5-4-1.1 5-4-1.2 5-4-2 5-4-2.1 5-4-2.2 5-4-2.3 5-4-2.4 5-4-3 5-4-3.1 5-4-4 5-4-4.1 5-4-5 5-4-5.1 5-4-6 5-4-6.1 V3-x

BIFILAR INSPECTION...................................................................................... Bifilar Inspection.................................................................................................. MAIN ROTOR BLADE INSPECTIONS. .......................................................... General. ................................................................................................................ Coin-Tapping Inspection Method........................................................................ Main Rotor Blade Cuff Inspection. ..................................................................... Root Laminates, Root Cap, and Root Fairing Inspection. ................................. Main Rotor Blade Deice Fairing Inspection. ...................................................... Main Rotor Blade Spar Region Inspection. ........................................................ Honeycomb Core Region Inspection................................................................... Trailing Edge Region Inspection......................................................................... Abrasion Strips Inspection................................................................................... Tooling and Tensile Test Patches Inspection. .................................................... Tip Cap and Tip Cap Fairing Inspection. ........................................................... TAIL ROTOR INSPECTIONS. .......................................................................... Tail Rotor Blade Inspection................................................................................. Tail Rotor Pitch Control Rod Inspection. ........................................................... TAIL ROTOR BLADE INSPECTIONS............................................................. General. ................................................................................................................ Coin-Tapping Inspection Method........................................................................ Tail Rotor Pitch Horn Fairing-to-Tail Rotor Blade Spar Clearance Inspection........................................................................................................................ Abrasion Strips Inspection................................................................................... Erosion Protection Strips Inspection. .................................................................. Tail Rotor Blade Pocket Skin.............................................................................. Tail Rotor Blade Horn-to-Torque Tube Inspection. ...........................................

5-3-10-1 5-3-10-1 5-3-11-1 5-3-11-2 5-3-11-5 5-3-11-5 5-3-11-5 5-3-11-13 5-3-11-14 5-3-11-14 5-3-11-14 5-3-11-15 5-3-11-15 5-3-11-15 5-3-12-1 5-3-12-1 5-3-12-2 5-3-13-1 5-3-13-2 5-3-13-2

MAINTENANCE PROCEDURES ..................................................................... MAIN ROTOR HEAD AND SHAFT EXTENSION. ....................................... Replace Main Rotor Head and Shaft Extension. ................................................ Replace Main Rotor Shaft Extension.................................................................. MAIN ROTOR HUB........................................................................................... Inspect/Repair Main Rotor Hub. ......................................................................... Repair Bonded Liner............................................................................................ Replace Bonded Liners, 70103-08002-115 (70103-08002-120), 7010308002-116, and 70103-08002-106....................................................................... Inspect/Repair Upper and Lower Pressure Plates............................................... MAIN ROTOR HUB THREADED INSERTS. ................................................. Replace Main Rotor Hub Threaded Inserts. ....................................................... MAIN ROTOR HEAD BOLTS. ......................................................................... Inspect/Repair Main Rotor Head Bolts. .............................................................. SPINDLE.............................................................................................................. Replace Spindle.................................................................................................... LEAD STOP. ....................................................................................................... Replace Lead Stop and Bracket. .........................................................................

5-4-1 5-4-1-1 5-4-1-3 5-4-1-22 5-4-2-1 5-4-2-2 5-4-2-6

Change 10

5-3-13-4 5-3-13-4 5-3-13-4 5-3-13-4 5-3-13-4

5-4-2-6 5-4-2-7 5-4-3-1 5-4-3-1 5-4-4-1 5-4-4-1 5-4-5-1 5-4-5-3 5-4-6-1 5-4-6-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 5-4-7 5-4-7.1 5-4-8 5-4-8.1 5-4-9 5-4-9.1 5-4-10 5-4-10.1 5-4-11 5-4-11.1 5-4-12 5-4-12.1 5-4-13 5-4-13.1 5-4-13.2 5-4-14 5-4-14.1 5-4-15 5-4-15.1 5-4-16 5-4-16.1 5-4-17 5-4-17.1 5-4-18 5-4-18.1 5-4-19 5-4-19.1 5-4-20 5-4-20.1 5-4-21 5-4-21.1 5-4-22 5-4-22.1 5-4-22.2 5-4-23 5-4-23.1 5-4-24 5-4-24.1 5-4-24.2 5-4-25 5-4-25.1 5-4-26 5-4-26.1 5-4-27

SPINDLE HORN. ................................................................................................ Replace Spindle Horn. ......................................................................................... SPINDLE BONDED WASHER. ........................................................................ Replace Spindle Bonded Washer. ....................................................................... ANTIFLAP ASSEMBLY. ................................................................................... Replace Antiflap Assembly. ................................................................................ DROOP STOP CAM. .......................................................................................... Replace Droop Stop Cam. ................................................................................... DROOP STOP BUSHINGS. ............................................................................... Replace Droop Stop Bushings............................................................................. DROOP STOP PAD. ........................................................................................... Replace Droop Stop Pad...................................................................................... DAMPER. ............................................................................................................ Replace Damper. .................................................................................................. Inspect/Repair Damper......................................................................................... DAMPER INDICATOR. ..................................................................................... Replace Damper Indicator. .................................................................................. DAMPER BRACKET. ........................................................................................ Replace Damper Bracket. .................................................................................... DAMPER BEARINGS. ....................................................................................... Replace Damper Bearings. .................................................................................. BLEED DAMPER (DAMPER REMOVED). .................................................... Bleed Damper (Damper Removed). .................................................................... PITCH CONTROL RODS. ................................................................................. Replace Pitch Control Rods................................................................................. PITCH CONTROL ROD END SPHERICAL BEARINGS............................... Replace Pitch Control Rod End Spherical Bearings. ......................................... PITCH CONTROL ROD UPPER AND LOWER ROD ENDS........................ Replace Pitch Control Rod Upper and Lower Rod Ends................................... PITCH CONTROL ROD ADJUSTMENT. ........................................................ Adjust Pitch Control Rod. ................................................................................... SWASHPLATE.................................................................................................... Replace Swashplate.............................................................................................. Inspect/Repair Swashplate. .................................................................................. SWASHPLATE SCISSORS ATTACHMENT SPHERICAL BEARING......... Replace Swashplate Scissors Attachment Spherical Bearing............................. SWASHPLATE EXPANDABLE PIN REPAIR. ............................................... Inspect/Repair Swashplate Expandable Pins....................................................... Inspect Swashplate Expandable Pin Nuts. .......................................................... SWASHPLATE SPHERICAL BEARING RETAINER INSERTS................... Replace Swashplate Spherical Bearing Retainer Inserts. ................................... SWASHPLATE SCISSORS ATTACHMENT RETAINER INSERTS. ........... Replace Swashplate Scissors Attachment Retainer Inserts. ............................... ROTATING SCISSORS......................................................................................

Change 10

5-4-7-1 5-4-7-2 5-4-8-1 5-4-8-1 5-4-9-1 5-4-9-2 5-4-10-1 5-4-10-2 5-4-11-1 5-4-11-2 5-4-12-1 5-4-12-1 5-4-13-1 5-4-13-1 5-4-13-4 5-4-14-1 5-4-14-1 5-4-15-1 5-4-15-1 5-4-16-1 5-4-16-2 5-4-17-1 5-4-17-2 5-4-18-1 5-4-18-1 5-4-19-1 5-4-19-2 5-4-20-1 5-4-20-1 5-4-21-1 5-4-21-1 5-4-22-1 5-4-22-2 5-4-22-6 5-4-23-1 5-4-23-1 5-4-24-1 5-4-24-1 5-4-24-1 5-4-25-1 5-4-25-1 5-4-26-1 5-4-26-1 5-4-27-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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TABLE OF CONTENTS (Cont)

Page 5-4-27.1 5-4-28 5-4-28.1 5-4-28.2 5-4-28.3 5-4-29 5-4-29.1 5-4-30 5-4-30.1 5-4-30.2 5-4-31 5-4-31.1 5-4-31.2 5-4-31.3 5-4-31.4 5-4-31.5 5-4-31.6 5-4-31.7 5-4-31.8 5-4-31.9 5-4-31.10 5-4-31.11 5-4-31.12 5-4-31.13 5-4-31.14 5-4-31.15 5-4-31.16 5-4-31.17 5-4-31.18 5-4-31.19 5-4-31.20 5-4-31.21 5-4-31.22 5-4-31.23 5-4-31.24 5-4-32 5-4-32.1 5-4-33 5-4-33.1 5-4-34 5-4-34.1 5-4-34.2 5-4-34.3 V3-xii

Replace Rotating Scissors.................................................................................... BIFILAR. ............................................................................................................. Replace Bifilar...................................................................................................... Replace Threaded Insert. ..................................................................................... Replace Clinch Nut.............................................................................................. BIFILAR WEIGHT. ............................................................................................ Replace Bifilar Weight......................................................................................... BIFILAR COVER................................................................................................ Replace Bifilar Cover........................................................................................... Replace Bifilar Cover Gasket. ............................................................................. MAIN ROTOR BLADES.................................................................................... Replace Main Rotor Blade. ................................................................................. Adhesive Filler Repair. ........................................................................................ Adhesive Injection Repair. .................................................................................. Skin Patch Repair. ............................................................................................... Plug Patch Repair. ............................................................................................... Trailing Edge Patch Repair. ................................................................................ Replace Tip Cap................................................................................................... Tip Cap-to-Main Rotor Blade Sealing. ............................................................... Bond Repair. ........................................................................................................ Corrosion Removal. ............................................................................................. Tip Cap Holes Repair. ......................................................................................... Tip Cap Skin and Fairing Crack Repair. ............................................................ Abrasion Strip Repair. ......................................................................................... Tip Block Weight Chordwise and Spanwise Unbalance Calculation and Adjustment. .......................................................................................................... Tip Block Weight Inspection/Repair................................................................... Tip Cap Rib Cracks Repair. ................................................................................ Tip Block Insert, RZA12487, Repair.................................................................. Aluminum Wire Mesh Lightning Protection Repair. ......................................... Replace Polyurethane Patch................................................................................. Paint Touchup. ..................................................................................................... Cosmetic Adhesive Crack Repair........................................................................ Discrepant Root End Skin Plies Repair. ............................................................. Trailing Edge Root Skin Crack (RSTA 42.0 - 50.0) Repair. ............................ Remove Stuck Main Rotor Blade Pin................................................................. MAIN ROTOR BLADE CUFF DECAL............................................................ Replace Main Rotor Blade Cuff Decal. .............................................................. MAIN ROTOR BLADE RECEIVER ASSEMBLY. ......................................... Replace Main Rotor Blade Receiver Assembly. ................................................ BLADE INSPECTION METHOD (BIMt) PRESSURE INDICATOR. .......... Replace Blade Inspection Method (BIMt) Pressure Indicator. ......................... Replace Blade Inspection Method (BIMt) Pressure Indicator Manual Test Lever..................................................................................................................... Replace Blade Inspection Method (BIMt) Pressure Indicator Adapter. ........... Change 10

5-4-27-1 5-4-28-1 5-4-28-2 5-4-28-8 5-4-28-9 5-4-29-1 5-4-29-1 5-4-30-1 5-4-30-1 5-4-30-2 5-4-31-1 5-4-31-4 5-4-31-17 5-4-31-23 5-4-31-26 5-4-31-32 5-4-31-41 5-4-31-46 5-4-31-51 5-4-31-51 5-4-31-53 5-4-31-54 5-4-31-55 5-4-31-55 5-4-31-56 5-4-31-60 5-4-31-63 5-4-31-63 5-4-31-66 5-4-31-66 5-4-31-67 5-4-31-69 5-4-31-72 5-4-31-73 5-4-31-76 5-4-32-1 5-4-32-1 5-4-33-1 5-4-33-1 5-4-34-1 5-4-34-2 5-4-34-2 5-4-34-4

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 5-4-35 5-4-35.1 5-4-35.2 5-4-36 5-4-36.1 5-4-37 5-4-37.1 5-4-38 5-4-38.1 5-4-38.2 5-4-38.3 5-4-38.4 5-4-38.5 5-4-38.6 5-4-38.7 5-4-38.8 5-4-38.9 5-4-38.10 5-4-39 5-4-39.1 5-4-40 5-4-40.1 5-4-41 5-4-41.1 5-4-42 5-4-42.1 5-4-43 5-4-43.1

MAIN ROTOR BLADE AIR VALVE............................................................... Replace Main Rotor Blade Air Valve................................................................. Replace Main Rotor Blade Air Valve Adapter................................................... MAIN ROTOR BLADE WHIRL TEST (ONE HOUR).................................... Main Rotor Blade Whirl Test (One Hour). ........................................................ MAIN ROTOR BLADE SPAR LEAKAGE TEST. .......................................... Test Components for Leakage............................................................................. TAIL ROTOR BLADES. .................................................................................... Replace Tail Rotor Blades................................................................................... Adhesive Filler Repair. ........................................................................................ Adhesive Injection Repair. .................................................................................. Polyurethane Abrasion Strip Repair (Primary Method). .................................... Polyurethane Abrasion Strip Repair (Alternate Method). .................................. Replace Tip Cap................................................................................................... Abrasion Strip Repair. ......................................................................................... Aluminum Wire Mesh Lightning Protection Repair. ......................................... Trailing Edge Disbond Repair............................................................................. Paint Touchup. ..................................................................................................... TAIL ROTOR PITCH CONTROL RODS. ........................................................ Replace Tail Rotor Pitch Control Rods. ............................................................. TAIL ROTOR PITCH BEAM. ........................................................................... Replace Tail Rotor Pitch Beam........................................................................... TAIL ROTOR BOOT.......................................................................................... Replace Tail Rotor Boot...................................................................................... OUTBOARD RETENTION PLATE REPAIR (PLATE REMOVED). ............ Inspect/Repair Outboard Retention Plate. ........................................................... TAIL ROTOR BLADE DEICE BRACKET . .................................................... Replace Tail Rotor Blade Deice Bracket............................................................

5-4-35-1 5-4-35-1 5-4-35-4 5-4-36-1 5-4-36-1 5-4-37-1 5-4-37-1 5-4-38-1 5-4-38-3 5-4-38-15 5-4-38-16 5-4-38-18 5-4-38-19 5-4-38-21 5-4-38-22 5-4-38-22 5-4-38-25 5-4-38-26 5-4-39-1 5-4-39-1 5-4-40-1 5-4-40-2 5-4-41-1 5-4-41-1 5-4-42-1 5-4-42-1 5-4-43-1 5-4-43-1

Section 5-5 5-5-1 5-5-1.1 5-5-2 5-5-2.1 5-5-3 5-5-3.1 5-5-4 5-5-4.1 5-5-5 5-5-5.1 5-5-6 5-5-6.1 5-5-7 5-5-7.1

MAINTENANCE PROCEDURES (BENCH).................................................... MAIN ROTOR SHAFT NUT (BENCH). .......................................................... Replace Insert (BENCH). .................................................................................... SPINDLE SLEEVE BEARING OUTER SLEEVE (BENCH).......................... Replace Spindle Sleeve Bearing Outer Sleeve (BENCH).................................. SPINDLE CUFF LUG BUSHINGS (BENCH).................................................. Replace Spindle Cuff Lug Bushings (BENCH).................................................. SPINDLE ELASTOMERIC BEARING ASSEMBLY (BENCH). .................... Repair Spindle Elastomeric Bearing Assembly (BENCH)................................. DAMPER INDICATOR (BENCH)..................................................................... Repair Damper Indicator (BENCH).................................................................... DAMPER ROD END, CYLINDER HEAD, AND SEALS (BENCH). ............ Replace Damper Rod End, Cylinder Head, and Seals (BENCH)...................... SWASHPLATE LARGE SPHERICAL BEARING (BENCH). ........................ Replace Swashplate Large Spherical Bearing (BENCH). ..................................

5-5-1 5-5-1-1 5-5-1-1 5-5-2-1 5-5-2-1 5-5-3-1 5-5-3-1 5-5-4-1 5-5-4-2 5-5-5-1 5-5-5-1 5-5-6-1 5-5-6-2 5-5-7-1 5-5-7-1

Change 10

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Page 5-5-8 5-5-8.1 5-5-9 5-5-9.1 5-5-10 5-5-10.1 5-5-11 5-5-11.1 5-5-12 5-5-12.1 5-5-12.2 5-5-13 5-5-13.1 5-5-14 5-5-14.1 5-5-15 5-5-15.1 5-5-16 5-5-16.1 5-5-17 5-5-17.1 5-5-18 5-5-18.1 5-5-19 5-5-19.1 5-5-20 5-5-20.1

V3-xiv

ROTATING SCISSORS UPPER LINK BEARINGS (BENCH). ..................... Replace Rotating Scissors Upper Link Bearings (BENCH). ............................. ROTATING SCISSORS LOWER LINK BUSHING (BENCH)....................... Replace Rotating Scissors Lower Link Bushing (BENCH)............................... BIFILAR ARM BUSHINGS (BENCH). ............................................................ Replace Bifilar Arm Bushings (BENCH). .......................................................... BIFILAR WEIGHT BUSHINGS (BENCH)....................................................... Replace Bifilar Weight Bushings (BENCH)....................................................... MAIN ROTOR BLADE CUFF BUSHINGS AND LINERS (BENCH). ......... Replace Main Rotor Blade Cuff Bushings (BENCH). ....................................... Replace Main Rotor Blade Cuff Liners (BENCH)............................................. TAIL ROTOR PITCH BEAM BUSHINGS (BENCH). .................................... Replace Tail Rotor Pitch Beam Bushings (BENCH). ........................................ TAIL ROTOR PITCH HORN BUSHINGS (BENCH)...................................... Replace Tail Rotor Pitch Horn Bushings (BENCH). ......................................... TAIL ROTOR PITCH CONTROL ROD END SPHERICAL BEARINGS (BENCH).............................................................................................................. Replace Tail Rotor Pitch Control Rod End Spherical Bearings (BENCH)....... TAIL ROTOR BLADE PIVOT BEARINGS (BENCH). .................................. Replace Tail Rotor Blade Pivot Bearings (BENCH). ........................................ TAIL ROTOR BLADE SPAR AND TAIL ROTOR PITCH HORN FAIRING (BENCH). .................................................................................................... Inspect Tail Rotor Blade Spar and Rework Tail Rotor Pitch Horn Fairing (BENCH).............................................................................................................. TAIL ROTOR BLADE PIVOT BEARING RETAINERS (BENCH). ............. Replace Tail Rotor Blade Pivot Bearing Retainers (BENCH)........................... TAIL ROTOR BOOT SUPPORTS (BENCH). .................................................. Replace Tail Rotor Boot Supports (BENCH)..................................................... OUTBOARD RETENTION PLATE (BENCH)................................................. Repair Outboard Retention Plate (BENCH). ......................................................

Change 10

5-5-8-1 5-5-8-1 5-5-9-1 5-5-9-1 5-5-10-1 5-5-10-1 5-5-11-1 5-5-11-1 5-5-12-1 5-5-12-1 5-5-12-2 5-5-13-1 5-5-13-1 5-5-14-1 5-5-14-1 5-5-15-1 5-5-15-1 5-5-16-1 5-5-16-2 5-5-17-1 5-5-17-1 5-5-18-1 5-5-18-1 5-5-19-1 5-5-19-2 5-5-20-1 5-5-20-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

VOLUME

4

TABLE OF CONTENTS Page CHAPTER 6

DRIVE SYSTEM.................................................................................................

6-1

Section 6-1 6-1-1 6-1-1.1 6-1-1.2 6-1-1.3 6-1-1.4 6-1-1.5 6-1-1.6 6-1-1.7 6-1-2

EQUIPMENT DESCRIPTION AND DATA ..................................................... TRANSMISSION SYSTEM DESCRIPTION AND DATA.............................. Transmission System. .......................................................................................... Transmission System Operation. ......................................................................... Main Transmission............................................................................................... Intermediate Gear Box......................................................................................... Tail Gear Box....................................................................................................... Gust Lock. ............................................................................................................ Tail Rotor Drive Shaft. ........................................................................................ MAIN TRANSMISSION LUBRICATION SYSTEM DESCRIPTION AND DATA. .................................................................................................................. Main Transmission Lubrication System.............................................................. Lubrication Pumps. .............................................................................................. Two-Stage Oil Filter. ........................................................................................... Oil Cooler and Fan. ............................................................................................. Spline Wear Indicators......................................................................................... MAIN TRANSMISSION WARNING AND INDICATING SYSTEM DESCRIPTION AND DATA.............................................................................. Main Transmission Warning and Indicating System.......................................... Main Transmission Oil Temperature and Pressure Warning Indicating System. ................................................................................................................. Main Transmission Oil Temperature and Pressure Indicating Systems. ........... MAIN TRANSMISSION AND GEAR BOX CHIP DETECTOR SYSTEM DESCRIPTION AND DATA.............................................................................. Main Gear Box Chip Detector. ........................................................................... Accessory Modules Chip Detectors. ................................................................... Input Modules Chip Detectors............................................................................. Intermediate Gear Box Chip Detector................................................................. Tail Gear Box Chip Detector. ............................................................................. Chip Detector With Built-In-Test (BIT) Circuitry. ............................................

6-1-1 6-1-1-1 6-1-1-1 6-1-1-1 6-1-1-1 6-1-1-1 6-1-1-1 6-1-1-4 6-1-1-4

6-1-2.1 6-1-2.2 6-1-2.3 6-1-2.4 6-1-2.5 6-1-3 6-1-3.1 6-1-3.2 6-1-3.3 6-1-4 6-1-4.1 6-1-4.2 6-1-4.3 6-1-4.4 6-1-4.5 6-1-4.6 Section 6-2 6-2-1 6-2-2 6-2-2.1 6-2-2.2

TROUBLESHOOTING ....................................................................................... GUST LOCK SYSTEM. ..................................................................................... TRANSMISSION CHIP DETECTOR, INSTRUMENTS, AND OIL WARNING SYSTEMS.................................................................................................... Improved Chip Detector. ..................................................................................... Chip Detector. ......................................................................................................

6-1-2-1 6-1-2-1 6-1-2-1 6-1-2-1 6-1-2-1 6-1-2-1 6-1-3-1 6-1-3-1 6-1-3-1 6-1-3-1 6-1-4-1 6-1-4-1 6-1-4-1 6-1-4-1 6-1-4-1 6-1-4-1 6-1-4-2 6-2-1 6-2-1-1 6-2-2-1 6-2-2-2 6-2-2-5

Change 10 This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 6-2-2.2.1 6-2-2.2.2 6-2-2.2.3 6-2-2.2.4 6-2-2.2.5 6-2-2.2.6 6-2-2.2.7 6-2-2.3 6-2-2.4 6-2-3 6-2-3.1 6-2-3.2 6-2-3.3 6-2-3.4

Left Accessory Module Chip Detector. .............................................................. Left Input Module Chip Detector........................................................................ Right Accessory Module Chip Detector. ............................................................ Right Input Module Chip Detector. .................................................................... Main Module Sump Chip Detector/Temperature Sensor. .................................. Intermediate Gear Box Chip Detector/Temperature Sensor............................... Tail Gear Box Chip Detector/Temperature Sensor............................................. Instruments and Oil Warning. ............................................................................. Shutdown.............................................................................................................. Rotor Brake System. ............................................................................................ Rotor Brake Static Check. ................................................................................... Rotor Brake Break-In Procedure. ........................................................................ Rotor Brake Dynamic Check............................................................................... Shutdown..............................................................................................................

6-2-2-5 6-2-2-6 6-2-2-7 6-2-2-7 6-2-2-8 6-2-2-9 6-2-2-10 6-2-2-11 6-2-2-13 6-2-3-1 6-2-3-1 6-2-3-2 6-2-3-3 6-2-3-4

Section 6-3 6-3-1 6-3-1.1 6-3-2 6-3-2.1 6-3-3 6-3-3.1 6-3-3.2 6-3-4 6-3-4.1 6-3-5 6-3-5.1 6-3-6 6-3-6.1 6-3-6.2 6-3-7 6-3-7.1 6-3-8 6-3-8.1 6-3-8.2 6-3-8.3 6-3-8.4 6-3-9 6-3-9.1 6-3-10 6-3-10.1 6-3-10.2 6-3-10.3 6-3-10.4

ON AIRCRAFT INSPECTIONS ........................................................................ MAIN TRANSMISSION MOUNTING BOLT INSPECTION. ........................ Main Transmission Mounting Bolt Torque Check. ............................................ MAIN TRANSMISSION DOWEL PIN INSPECTION. ................................... Main Transmission Dowel Pin Inspection. ......................................................... MAIN ROTOR SHAFT INSPECTIONS............................................................ Swashplate Guide and Main Rotor Shaft Seal Leakage Inspection................... Main Rotor Shaft Inspection. .............................................................................. MAIN TRANSMISSION FUNCTIONAL TEST............................................... Main Transmission Functional Test. ................................................................... MAIN TRANSMISSION SERVICEABILITY INSPECTION.......................... Main Transmission Serviceability Inspection. .................................................... MAIN TRANSMISSION CHIP DETECTORS PARTICLE INSPECTIONS. . General. ................................................................................................................ Main Transmission Chip Detectors Particle Inspections.................................... MAIN TRANSMISSION LUBRICATION SYSTEM INSPECTION. ............. Main Transmission Oil Filter Inspection. ........................................................... INPUT MODULE INSPECTIONS. .................................................................... Elastomeric Gimbal Inspection............................................................................ Input Module/Quill Shaft Inspection................................................................... Input Seal Leakage Inspection............................................................................. Input Pinion Inspection........................................................................................ ACCESSORY MODULE INSPECTION. .......................................................... Leakage Inspection............................................................................................... INTERMEDIATE GEAR BOX INSPECTIONS. .............................................. Intermediate Gear Box Input Seal Leakage Inspection...................................... Intermediate Gear Box Output Seal Leakage Inspection. .................................. Intermediate Gear Box Sight Plug Inspection. ................................................... Intermediate Gear Box Input and Output Flange Inspection. ............................

6-3-1 6-3-1-1 6-3-1-1 6-3-2-1 6-3-2-1 6-3-3-1 6-3-3-1 6-3-3-1 6-3-4-1 6-3-4-1 6-3-5-1 6-3-5-1 6-3-6-1 6-3-6-1 6-3-6-2 6-3-7-1 6-3-7-1 6-3-8-1 6-3-8-1 6-3-8-3 6-3-8-3 6-3-8-3 6-3-9-1 6-3-9-1 6-3-10-1 6-3-10-2 6-3-10-2 6-3-10-2 6-3-10-2

V4-ii

Change 10

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 6-3-11

6-3-17.1 6-3-17.2 6-3-18 6-3-18.1 6-3-19 6-3-19.1

INTERMEDIATE GEAR BOX CHIP DETECTOR/TEMPERATURE SENSOR PARTICLE INSPECTIONS. ...................................................................... General. ................................................................................................................ Intermediate Gear Box Chip Detector/Temperature Sensor Particle Inspections. ..................................................................................................................... INTERMEDIATE GEAR BOX SERVICEABILITY INSPECTION................ Intermediate Gear Box Serviceability Inspection. .............................................. TAIL ROTOR DRIVE SHAFT INSPECTION.................................................. Inspect Tail Rotor Drive Shaft. ........................................................................... TAIL ROTOR DRIVE SHAFT VISCOUS DAMPER BEARING ASSEMBLY INSPECTION. .................................................................................... Inspect Tail Rotor Drive Shaft Viscous Damper Bearing Assembly Inspection........................................................................................................................ OIL COOLER INSPECTIONS. .......................................................................... Exit Flange Retaining Nut Torque Check and Inspection. ................................ Oil Cooler Drive Shaft Bearing Inspection......................................................... Oil Cooler Spline Wear Inspection. .................................................................... TAIL GEAR BOX INSPECTIONS. ................................................................... Tail Gear Box Input Seal Leakage Inspection.................................................... Inboard Retention Plate Seal Leakage Inspection. ............................................. Tail Gear Box Sight Plug Inspection. ................................................................. Tail Gear Box Input Flange Inspection............................................................... TAIL GEAR BOX CHIP DETECTOR/TEMPERATURE SENSOR PARTICLE INSPECTIONS. ............................................................................... General. ................................................................................................................ Tail Gear Box Chip Detector/Temperature Sensor Particle Inspections. .......... TAIL GEAR BOX SERVICEABILITY INSPECTION. ................................... Tail Gear Box Serviceability Inspection. ............................................................ MAIN TRANSMISSION HOUSING INTERFERENCE INSPECTION.......... Main Transmission Housing Interference Inspection. ........................................

Section 6-4 6-4-1 6-4-1.1 6-4-1.2 6-4-2 6-4-2.1 6-4-3 6-4-3.1 6-4-4 6-4-4.1 6-4-5 6-4-5.1 6-4-6 6-4-6.1

MAINTENANCE PROCEDURES ..................................................................... MAIN TRANSMISSION..................................................................................... Replace Main Transmission................................................................................. Reseat Dowel Pin................................................................................................. MAIN TRANSMISSION TAIL TAKEOFF FLANGE...................................... Replace Main Transmission Tail Takeoff Flange............................................... MAIN TRANSMISSION OUTPUT SHAFT SEAL. ......................................... Replace Main Transmission Output Shaft Seal. ................................................. MAIN TRANSMISSION BREATHER PLUG. ................................................. Replace Main Transmission Breather Plug......................................................... SWASHPLATE GUIDE AND MAIN ROTOR SHAFT SEAL........................ Replace Swashplate Guide and Main Rotor Shaft Seal. .................................... MAIN ROTOR SHAFT PLUG........................................................................... Replace Main Rotor Shaft Plug...........................................................................

6-3-11.1 6-3-11.2 6-3-12 6-3-12.1 6-3-13 6-3-13.1 6-3-14 6-3-14.1 6-3-15 6-3-15.1 6-3-15.2 6-3-15.3 6-3-16 6-3-16.1 6-3-16.2 6-3-16.3 6-3-16.4 6-3-17

Change 10

6-3-11-1 6-3-11-1 6-3-11-1 6-3-12-1 6-3-12-1 6-3-13-1 6-3-13-1 6-3-14-1 6-3-14-1 6-3-15-1 6-3-15-2 6-3-15-3 6-3-15-4 6-3-16-1 6-3-16-2 6-3-16-2 6-3-16-2 6-3-16-2 6-3-17-1 6-3-17-1 6-3-17-1 6-3-18-1 6-3-18-1 6-3-19-1 6-3-19-2 6-4-1 6-4-1-1 6-4-1-3 6-4-1-54 6-4-2-1 6-4-2-2 6-4-3-1 6-4-3-2 6-4-4-1 6-4-4-1 6-4-5-1 6-4-5-1 6-4-6-1 6-4-6-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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TABLE OF CONTENTS (Cont)

Page 6-4-7 6-4-7.1 6-4-8 6-4-8.1 6-4-9 6-4-9.1 6-4-10 6-4-10.1 6-4-11 6-4-11.1 6-4-12 6-4-12.1 6-4-13 6-4-13.1 6-4-14 6-4-14.1 6-4-15 6-4-15.1 6-4-15.2 6-4-16 6-4-16.1 6-4-17 6-4-17.1 6-4-17.2 6-4-18 6-4-18.1 6-4-19 6-4-19.1 6-4-19.2 6-4-20 6-4-20.1 6-4-21 6-4-21.1 6-4-22 6-4-22.1 6-4-23 6-4-23.1 6-4-24 6-4-24.1 6-4-25 6-4-25.1 6-4-26 6-4-26.1 V4-iv

MAIN ROTOR SHAFT INSPECT/REPAIR...................................................... Inspect/Repair Main Rotor Shaft......................................................................... GUST LOCK ROD AND LEVER. .................................................................... Replace Gust Lock Rod and Lever. .................................................................... GUST LOCK INDICATOR SWITCH. .............................................................. Replace Gust Lock Indicator Switch................................................................... LEVER BRACKET RTR BRAKE .................................................................... Replace Lever Bracket......................................................................................... MAIN MODULE HOUSING REPAIR. ............................................................. Repair Main Module Housing. ............................................................................ INPUT MODULE HOUSING REPAIR. ............................................................ Repair Input Module Housing. ............................................................................ ACCESSORY MODULE HOUSING REPAIR. ................................................ Repair Accessory Module Housing..................................................................... MAIN, INPUT, AND ACCESSORY MODULE HOUSING WATER ENTRAPMENT AREA CORROSION PROTECTION. ................................... Corrosion Protection of Water Entrapment Areas.............................................. ACCESSORY MODULE CHIP DETECTOR. .................................................. Replace Accessory Module Chip Detector. ........................................................ Replace Self-Closing Valve................................................................................. ACCESSORY MODULE OIL SCREEN. .......................................................... Replace Accessory Module Oil Screen............................................................... INPUT MODULE CHIP DETECTOR. .............................................................. Replace Input Module Chip Detector. ................................................................ Replace Self-Closing Valve................................................................................. MAIN MODULE SUMP CHIP DETECTOR/TEMPERATURE SENSOR. .... Replace Main Module Sump Chip Detector/Temperature Sensor. .................... MAIN TRANSMISSION OIL FILTER.............................................................. Replace Main Transmission Oil Filter. ............................................................... Replace Sleeve. .................................................................................................... MAIN TRANSMISSION OIL PUMP. ............................................................... Replace Main Transmission Oil Pump. .............................................................. MAIN TRANSMISSION OIL PRESSURE SENSOR....................................... Replace Main Transmission Oil Pressure Sensor. .............................................. MAIN TRANSMISSION OIL PUMP PRESSURE REGULATING VALVES. ............................................................................................................. Replace Main Transmission Oil Pump Pressure Regulating Valves. ................ MAIN TRANSMISSION OIL GAGE TUBE ASSEMBLY.............................. Replace Main Transmission Oil Gage Tube Assembly. .................................... MAIN TRANSMISSION OIL TEMPERATURE SWITCH. ............................ Replace Main Transmission Oil Temperature Switch........................................ INPUT MODULE................................................................................................ Replace Input Module.......................................................................................... INPUT MODULE OIL SEAL............................................................................. Replace Input Module Oil Seal. .......................................................................... Change 10

6-4-7-1 6-4-7-1 6-4-8-1 6-4-8-1 6-4-9-1 6-4-9-1 6-4-10-1 6-4-10-1 6-4-11-1 6-4-11-2 6-4-12-1 6-4-12-2 6-4-13-1 6-4-13-2 6-4-14-1 6-4-14-1 6-4-15-1 6-4-15-1 6-4-15-4 6-4-16-1 6-4-16-1 6-4-17-1 6-4-17-1 6-4-17-5 6-4-18-1 6-4-18-1 6-4-19-1 6-4-19-1 6-4-19-9 6-4-20-1 6-4-20-1 6-4-21-1 6-4-21-1 6-4-22-1 6-4-22-1 6-4-23-1 6-4-23-1 6-4-24-1 6-4-24-1 6-4-25-1 6-4-25-2 6-4-26-1 6-4-26-2

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

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INPUT MODULE INPUT FLANGE.................................................................. Replace Input Module Input Flange.................................................................... ACCESSORY MODULE. ................................................................................... Replace Accessory Module. ................................................................................ ACCESSORY MODULE SPLINE ADAPTER. ................................................ Replace Accessory Module Spline Adapter........................................................ ACCESSORY MODULE SHIM......................................................................... Replace Accessory Module Shim........................................................................ INTERMEDIATE GEAR BOX. ......................................................................... Replace Intermediate Gear Box........................................................................... INTERMEDIATE GEAR BOX INPUT SEAL AND FLANGE....................... Replace Intermediate Gear Box Input Seal and Flange. .................................... INTERMEDIATE GEAR BOX OUTPUT SEAL AND FLANGE................... Replace Intermediate Gear Box Output Seal and Flange................................... INTERMEDIATE GEAR BOX SIGHT PLUG. ................................................ Replace Intermediate Gear Box Sight Plug. ....................................................... INTERMEDIATE GEAR BOX OIL FILLER PLUG........................................ Replace Intermediate Gear Box Oil Filler Plug. ................................................ INTERMEDIATE GEAR BOX HOUSING REPAIR. ...................................... Repair Intermediate Gear Box Housing.............................................................. INTERMEDIATE GEAR BOX CHIP DETECTOR/TEMPERATURE SENSOR. ..................................................................................................................... Replace Intermediate Gear Box Chip Detector/Temperature Sensor................. Replace Self-Closing Valve................................................................................. TAIL ROTOR DRIVE SHAFT SECTION I...................................................... Replace Tail Rotor Drive Shaft Section I........................................................... TAIL ROTOR DRIVE SHAFT SECTION II. ................................................... Replace Tail Rotor Drive Shaft Section II. ........................................................ TAIL ROTOR DRIVE SHAFT SECTION III. .................................................. Replace Tail Rotor Drive Shaft Section III. ....................................................... TAIL ROTOR DRIVE SHAFT SECTION IV................................................... Replace Tail Rotor Drive Shaft Section IV........................................................ TAIL ROTOR DRIVE SHAFT FLEXIBLE COUPLING................................. Replace Tail Rotor Drive Shaft Flexible Coupling. ........................................... TAIL ROTOR DRIVE SHAFT VISCOUS DAMPER BEARING ASSEMBLY.............................................................................................................. Replace Tail Rotor Drive Shaft Viscous Damper Bearing Assembly. .............. TAIL ROTOR DRIVE SHAFT BEARING. ...................................................... Replace Tail Rotor Drive Shaft Bearing............................................................. VISCOUS DAMPER TUBE ASSEMBLY......................................................... Replace Viscous Damper Tube Assembly.......................................................... TAIL ROTOR DRIVE SHAFT REPAIR. .......................................................... Repair Tail Rotor Drive Shaft. ............................................................................ OIL COOLER RADIATOR. ............................................................................... Replace Oil Cooler Radiator. ..............................................................................

6-4-27-1 6-4-27-1 6-4-28-1 6-4-28-2 6-4-29-1 6-4-29-1 6-4-30-1 6-4-30-1 6-4-31-1 6-4-31-2 6-4-32-1 6-4-32-2 6-4-33-1 6-4-33-2 6-4-34-1 6-4-34-1 6-4-35-1 6-4-35-1 6-4-36-1 6-4-36-2 6-4-37-1 6-4-37-1 6-4-37-4 6-4-38-1 6-4-38-2 6-4-39-1 6-4-39-2 6-4-40-1 6-4-40-2 6-4-41-1 6-4-41-2 6-4-42-1 6-4-42-2 6-4-43-1 6-4-43-2 6-4-44-1 6-4-44-1 6-4-45-1 6-4-45-1 6-4-46-1 6-4-46-1 6-4-47-1 6-4-47-1

Change 10

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V4-vi

OIL COOLER RADIATOR THERMOSTATIC VALVE. ................................ Replace Oil Cooler Radiator Thermostatic Valve. ............................................. OIL COOLER RADIATOR LINES AND ELBOWS........................................ Replace Oil Cooler Radiator Lines and Elbows................................................. OIL COOLER. ..................................................................................................... Replace Oil Cooler............................................................................................... Replace Oil Cooler Fan, Drive Shaft, and Duct................................................. Oil Cooler Drive Shaft Runout Check................................................................ Input Flange Retaining Nut Torque Check......................................................... OIL COOLER SPLINE WEAR INDICATOR SYSTEM.................................. Spline Wear Indicator System Installation.......................................................... TAIL GEAR BOX. .............................................................................................. Replace Tail Gear Box. ....................................................................................... TAIL GEAR BOX INPUT SEAL AND FLANGE. .......................................... Replace Tail Gear Box Input Seal and Flange. .................................................. INBOARD RETENTION PLATE AND SEALS............................................... Replace Inboard Retention Plate and Seals. ....................................................... TAIL GEAR BOX SIGHT PLUG. ..................................................................... Replace Tail Gear Box Sight Plug...................................................................... TAIL GEAR BOX OIL FILLER PLUG. ........................................................... Replace Tail Gear Box Oil Filler Plug. .............................................................. TAIL GEAR BOX HOUSING REPAIR. ........................................................... Repair Tail Gear Box Housing............................................................................ TAIL GEAR BOX PULLEY GUARDS............................................................. Replace Tail Gear Box Pulley Guards................................................................ TAIL GEAR BOX CHIP DETECTOR/TEMPERATURE SENSOR. .............. Replace Tail Gear Box Chip Detector/Temperature Sensor. ............................. Replace Self-Closing Valve................................................................................. ROTOR BRAKE MASTER CYLINDER........................................................... Replace Rotor Brake Master Cylinder. ............................................................... ROTOR BRAKE ACCUMULATOR. ................................................................ Replace Rotor Brake Accumulator...................................................................... ROTOR BRAKE MANIFOLD AND VALVE ASSEMBLY............................ Replace Rotor Brake Manifold and Valve Assembly. ....................................... ROTOR BRAKE PRESSURE SWITCH............................................................ Replace Rotor Brake Pressure Switch................................................................. ROTOR BRAKE PRESSURE GAGE. ............................................................... Replace Rotor Brake Pressure Gage. .................................................................. ROTOR BRAKE MASTER CYLINDER BLEEDER VALVE. ....................... Replace Rotor Brake Master Cylinder Bleeder Valve. ...................................... ROTOR BRAKE PLUNGER.............................................................................. Replace Rotor Brake Plunger. ............................................................................. ROTOR BRAKE SYSTEM LINES.................................................................... Replace Rotor Brake System Lines.....................................................................

Change 10

6-4-48-1 6-4-48-1 6-4-49-1 6-4-49-1 6-4-50-1 6-4-50-2 6-4-50-9 6-4-50-19 6-4-50-20 6-4-51-1 6-4-51-1 6-4-52-1 6-4-52-2 6-4-53-1 6-4-53-2 6-4-54-1 6-4-54-2 6-4-55-1 6-4-55-1 6-4-56-1 6-4-56-1 6-4-57-1 6-4-57-2 6-4-58-1 6-4-58-1 6-4-59-1 6-4-59-1 6-4-59-4 6-4-60-1 6-4-60-1 6-4-61-1 6-4-61-1 6-4-62-1 6-4-62-1 6-4-63-1 6-4-63-1 6-4-64-1 6-4-64-1 6-4-65-1 6-4-65-1 6-4-66-1 6-4-66-1 6-4-67-1 6-4-67-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

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BLEED ROTOR BRAKE SYSTEM. ................................................................. Bleed Rotor Brake System. ................................................................................. ROTOR BRAKE TUBING. ................................................................................ Repair Rotor Brake Tubing. ................................................................................ ROTOR BRAKE ASSEMBLY. .......................................................................... Replace Rotor Brake Assembly........................................................................... ROTOR BRAKE LININGS (PUCKS). .............................................................. Replace Rotor Brake Linings (Pucks)................................................................. ROTOR BRAKE BLEEDER VALVE. .............................................................. Replace Rotor Brake Bleeder Valve. .................................................................. ROTOR BRAKE DISC. ...................................................................................... Replace Rotor Brake Disc. .................................................................................. ROTOR BRAKE MOUNTING BRACKET....................................................... Replace Rotor Brake Mounting Bracket. ............................................................ ROTOR SPEED (Nr) SENSOR. ......................................................................... Replace Rotor Speed (Nr) Sensor. ...................................................................... LOW OIL PRESSURE SWITCH. ...................................................................... Replace Low Oil Pressure Switch.......................................................................

6-4-68-1 6-4-68-1 6-4-69-1 6-4-69-1 6-4-70-1 6-4-70-1 6-4-71-1 6-4-71-1 6-4-72-1 6-4-72-1 6-4-73-1 6-4-73-1 6-4-74-1 6-4-74-1 6-4-75-1 6-4-75-1 6-4-76-1 6-4-76-1

Section 6-5

MAINTENANCE PROCEDURES (BENCH) - NOT APPLICABLE ..............

6-5-1

CHAPTER 7

PNEUDRAULIC SYSTEM.................................................................................

7-1

Section 7-1 7-1-1 7-1-1.1 7-1-1.2 7-1-1.3 7-1-1.4 7-1-1.5 7-1-1.6 7-1-1.7 7-1-1.8 7-1-1.9 7-1-1.10 7-1-2

EQUIPMENT DESCRIPTION AND DATA ..................................................... HYDRAULIC SYSTEMS DESCRIPTION AND DATA. ................................ Hydraulic Systems Description. .......................................................................... No. 1 Hydraulic System. ..................................................................................... No. 2 Hydraulic System. ..................................................................................... Backup Hydraulic System. .................................................................................. Hydraulic Pump Modules. ................................................................................... Primary Servo Shutoff Switch. ............................................................................ Hydraulic Leak Test Switch. ............................................................................... APU Accumulator................................................................................................ Winterization Kit.................................................................................................. Hydraulic Refill Hand Pump and Selector Valve............................................... HYDRAULIC SERVOS, ACTUATORS, AND MODULES DESCRIPTION AND DATA. ........................................................................................................ Transfer Modules. ................................................................................................ No. 1 Transfer Module. ....................................................................................... No. 2 Transfer Module. ....................................................................................... Utility Module...................................................................................................... Primary Servos. .................................................................................................... Pilot-Assist Servos and Module. ......................................................................... Collective Boost Servo. ....................................................................................... Yaw Boost Servo. ................................................................................................

7-1-1 7-1-1-1 7-1-1-1 7-1-1-1 7-1-1-1 7-1-1-1 7-1-1-2 7-1-1-2 7-1-1-2 7-1-1-3 7-1-1-3 7-1-1-3

7-1-2.1 7-1-2.2 7-1-2.3 7-1-2.4 7-1-2.5 7-1-2.6 7-1-2.7 7-1-2.8

Change 10

7-1-2-1 7-1-2-1 7-1-2-1 7-1-2-1 7-1-2-1 7-1-2-1 7-1-2-1 7-1-2-2 7-1-2-2

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Page 7-1-2.9 7-1-2.10 7-1-2.11 7-1-2.12 7-1-2.13

Roll SAS Actuator. .............................................................................................. Pitch Trim Actuator Assembly............................................................................ Pilot-Assist Module.............................................................................................. Tail Rotor Servo. ................................................................................................. Logic Modules. ....................................................................................................

7-1-2-2 7-1-2-2 7-1-2-2 7-1-2-2 7-1-2-2

Section 7-2 7-2-1 7-2-1.1 7-2-1.2 7-2-1.3 7-2-1.4 7-2-1.5 7-2-1.6 7-2-1.7 7-2-1.8 7-2-1.9 7-2-1.10

TROUBLESHOOTING ....................................................................................... HYDRAULIC SYSTEMS. .................................................................................. Backup Pump Operation - General Information................................................. Switch And Circuit Breaker Setup...................................................................... APU Accumulator - Recharge Using APU......................................................... APU Accumulator - Recharge Using External Power. ...................................... Hydraulic Leak Test............................................................................................. No. 1 Hydraulic System. ..................................................................................... No. 2 Hydraulic System. ..................................................................................... Backup Hydraulic System. .................................................................................. Primary Servo Pressure Switch Check................................................................ Shutdown..............................................................................................................

7-2-1 7-2-1-1 7-2-1-2 7-2-1-3 7-2-1-3 7-2-1-4 7-2-1-5 7-2-1-9 7-2-1-10 7-2-1-12 7-2-1-13 7-2-1-14

Section 7-3 7-3-1 7-3-1.1 7-3-2 7-3-2.1 7-3-3 7-3-3.1

ON AIRCRAFT INSPECTIONS ........................................................................ HYDRAULIC SYSTEM SEAL LEAKAGE INSPECTION. ............................ Hydraulic System Seal Leakage Criteria. ........................................................... PNEUMATIC SYSTEM INSPECTION. ............................................................ Inspect Pneumatic System Tubes. ....................................................................... HYDRAULIC PUMP MODULE INSPECTION. .............................................. Inspect Hydraulic Pump Modules. ......................................................................

7-3-1 7-3-1-1 7-3-1-1 7-3-2-1 7-3-2-1 7-3-3-1 7-3-3-1

Section 7-4 7-4-1 7-4-1.1 7-4-2 7-4-2.1 7-4-3 7-4-3.1 7-4-4 7-4-4.1 7-4-5 7-4-5.1 7-4-6 7-4-6.1 7-4-7 7-4-7.1 7-4-8 7-4-8.1

MAINTENANCE PROCEDURES ..................................................................... ENGINE STARTER. ........................................................................................... Replace Engine Starter......................................................................................... ENGINE STARTER CONTROL VALVE. ........................................................ Replace Engine Starter Control Valve. ............................................................... BLEED-AIR SHUTOFF VALVE. ...................................................................... Replace Bleed-Air Shutoff Valve........................................................................ APU CHECK VALVE. ....................................................................................... Replace APU Check Valve. ................................................................................ TRANSITION SECTION PNEUMATIC TUBES. ............................................ Replace Transition Section Pneumatic Tubes..................................................... OIL COOLER COMPARTMENT PNEUMATIC TUBES. .............................. Replace Oil Cooler Compartment Pneumatic Tubes.......................................... APU COMPARTMENT PNEUMATIC TUBES. .............................................. Replace APU Compartment Pneumatic Tubes. .................................................. ENGINE COMPARTMENT PNEUMATIC TUBES......................................... Replace Engine Compartment Pneumatic Tubes................................................

7-4-1 7-4-1-1 7-4-1-1 7-4-2-1 7-4-2-1 7-4-3-1 7-4-3-1 7-4-4-1 7-4-4-1 7-4-5-1 7-4-5-1 7-4-6-1 7-4-6-1 7-4-7-1 7-4-7-1 7-4-8-1 7-4-8-1

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TABLE OF CONTENTS (Cont)

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NIPPLE-CHECK VALVE................................................................................... Replace Nipple-Check Valve............................................................................... STARTER SPEED SWITCH. ............................................................................. Replace Starter Speed Switch.............................................................................. CONVERSION OF HYDRAULIC FLUIDS. ................................................... General. ................................................................................................................ Convert MIL-PRF-83282 to MIL-PRF-5606...................................................... Convert MIL-PRF-5606 to MIL-PRF-83282...................................................... NO. 1 AND NO. 2 HYDRAULIC PUMP MODULES..................................... Replace No. 1 and No. 2 Hydraulic Pump Modules.......................................... BACKUP HYDRAULIC PUMP MODULE. ..................................................... Replace Backup Hydraulic Pump Module.......................................................... HYDRAULIC PUMP MODULE FILTER. ........................................................ Replace Hydraulic Pump Module Filter. ............................................................ HYDRAULIC PUMP MODULE FILTER HOUSING PACKING AND RETAINER. ......................................................................................................... Replace Hydraulic Pump Module Filter Housing Packing and Retainer. ......... EXTERNAL HYDRAULIC POWER QUICK-DISCONNECT. ....................... Replace External Hydraulic Power Quick-Disconnect. ...................................... Replace External Hydraulic Power Quick-Disconnect Port Fitting. .................. HYDRAULIC PUMP MODULE PRESSURE AND RETURN QUICKDISCONNECTS. ................................................................................................ Replace Hydraulic Pump Module Pressure and Return Quick-Disconnects. .... HYDRAULIC PUMP MODULE SEAL DRAIN ELBOW. .............................. Replace Hydraulic Pump Module Seal Drain Elbow. ........................................ HYDRAULIC PUMP MODULE BLEED RELIEF VALVE............................ Replace Hydraulic Pump Module Bleed Relief Valve....................................... HYDRAULIC PUMP MODULE SIGHT GLASS. .......................................... Replace Hydraulic Pump Module Sight Glass. .................................................. HYDRAULIC PUMP MODULE TEMPERATURE INDICATORS. .............. Replace Hydraulic Pump Module Temperature Indicators. ............................... HYDRAULIC PUMP MODULE FLUID IDENT AND LEVEL INDICATOR PLATE. ...................................................................................................... Replace Hydraulic Pump Module Fluid Ident and Level Indicator Plate. ........ HYDRAULIC PUMP MODULE DIFFERENTIAL PRESSURE INDICATOR AND SHUTOFF ASSEMBLY. ................................................................. Replace Hydraulic Pump Module Differential Pressure Indicator. .................... Replace Hydraulic Pump Module Shutoff Assembly. ........................................ NO. 1 TRANSFER MODULE MANIFOLD. .................................................... Replace No. 1 Transfer Module Manifold.......................................................... NO. 1 PRIMARY SERVO MANIFOLD. ......................................................... Replace No. 1 Primary Servo Manifold.............................................................. NO. 1 TRANSFER MODULE............................................................................ Replace No. 1 Transfer Module. ......................................................................... NO. 1 TRANSFER MODULE PRESSURE SWITCH. .....................................

Change 10

7-4-9-1 7-4-9-1 7-4-10-1 7-4-10-1 7-4-11-1 7-4-11-1 7-4-11-1 7-4-11-3 7-4-12-1 7-4-12-2 7-4-13-1 7-4-13-1 7-4-14-1 7-4-14-1 7-4-15-1 7-4-15-1 7-4-16-1 7-4-16-1 7-4-16-2 7-4-17-1 7-4-17-1 7-4-18-1 7-4-18-1 7-4-19-1 7-4-19-1 7-4-20-1 7-4-20-1 7-4-21-1 7-4-21-1 7-4-22-1 7-4-22-1 7-4-23-1 7-4-23-1 7-4-23-3 7-4-24-1 7-4-24-1 7-4-25-1 7-4-25-1 7-4-26-1 7-4-26-2 7-4-27-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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TABLE OF CONTENTS (Cont)

Page 7-4-27.1 7-4-28 7-4-28.1 7-4-29 7-4-29.1 7-4-30 7-4-30.1 7-4-31 7-4-31.1 7-4-32 7-4-32.1 7-4-33 7-4-33.1 7-4-34 7-4-34.1 7-4-35 7-4-35.1 7-4-36 7-4-36.1 7-4-37 7-4-37.1 7-4-38 7-4-38.1 7-4-39 7-4-39.1 7-4-40 7-4-40.1 7-4-41 7-4-41.1 7-4-42 7-4-42.1 7-4-43 7-4-43.1 7-4-44 7-4-44.1 7-4-45 7-4-45.1 7-4-46 7-4-46.1 7-4-47 7-4-47.1 7-4-48 7-4-48.1 7-4-49 V4-x

Replace No. 1 Transfer Module Pressure Switch............................................... NO. 1 TRANSFER MODULE HOSES AND FITTINGS................................. Replace No. 1 Transfer Module Hoses and Fittings. ......................................... NO. 2 TRANSFER MODULE MANIFOLD. .................................................... Replace No. 2 Transfer Module Manifold.......................................................... NO. 2 PRIMARY SERVO MANIFOLD. ......................................................... Replace No. 2 Primary Servo Manifold.............................................................. NO. 2 TRANSFER MODULE. ......................................................................... Replace No. 2 Transfer Module. ......................................................................... NO. 2 TRANSFER MODULE PRESSURE SWITCH. ..................................... Replace No. 2 Transfer Module Pressure Switch............................................... NO. 2 TRANSFER MODULE HOSES AND FITTINGS................................. Replace No. 2 Transfer Module Hoses and Fittings. ......................................... PILOT-ASSIST MODULE.................................................................................. Replace Pilot-Assist Module. .............................................................................. PILOT-ASSIST MODULE SAS PRESSURE SWITCH. .................................. Replace Pilot-Assist Module SAS Pressure Switch. .......................................... PILOT-ASSIST MODULE THERMAL RELIEF VALVE. .............................. Replace Pilot-Assist Module Thermal Relief Valve........................................... BOOST SERVO AND PILOT-ASSIST MODULE MANIFOLD. ................... Replace Boost Servo and Pilot-Assist Module Manifold................................... UTILITY MODULE............................................................................................ Replace Utility Module........................................................................................ UTILITY MODULE PRESSURE SWITCH. ..................................................... Replace Utility Module Pressure Switch. ........................................................... UTILITY MODULE HOSES AND FITTINGS................................................. Replace Utility Module Hoses and Fittings........................................................ TAIL ROTOR SERVO 2ND STAGE SHUTOFF VALVE. ............................. Replace Tail Rotor Servo 2nd Stage Shutoff Valve........................................... RESCUE HOIST MANIFOLD RES HST ....................................................... Replace Rescue Hoist Manifold. ......................................................................... RESCUE HOIST TUBES RES HST ................................................................ Replace Rescue Hoist Tubes. .............................................................................. RESCUE HOIST PRIORITY VALVE RES HST ........................................... Replace Rescue Hoist Priority Valve.................................................................. RESCUE HOIST PLUGSTAT (THERMAL SWITCH) RES HST ................ Replace Rescue Hoist Plugstat (Thermal Switch). ............................................. MANIFOLD SELF-SEALING COUPLINGS. ................................................... Replace Manifold Self-Sealing Couplings. ......................................................... HYDRAULIC SELF-SEALING COUPLINGS.................................................. Replace Hydraulic Self-Sealing Couplings. ........................................................ TAIL ROTOR SERVO HYDRAULIC CONNECTOR SELF-SEALING COUPLINGS........................................................................................................ Replace Tail Rotor Servo Hydraulic Connector Self-Sealing Couplings. ......... HYDRAULIC SYSTEM RIGID TUBING......................................................... Change 10

7-4-27-1 7-4-28-1 7-4-28-1 7-4-29-1 7-4-29-1 7-4-30-1 7-4-30-1 7-4-31-1 7-4-31-1 7-4-32-1 7-4-32-1 7-4-33-1 7-4-33-1 7-4-34-1 7-4-34-1 7-4-35-1 7-4-35-1 7-4-36-1 7-4-36-1 7-4-37-1 7-4-37-2 7-4-38-1 7-4-38-1 7-4-39-1 7-4-39-1 7-4-40-1 7-4-40-1 7-4-41-1 7-4-41-1 7-4-42-1 7-4-42-1 7-4-43-1 7-4-43-1 7-4-44-1 7-4-44-1 7-4-45-1 7-4-45-1 7-4-46-1 7-4-46-1 7-4-47-1 7-4-47-1 7-4-48-1 7-4-48-1 7-4-49-1

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TABLE OF CONTENTS (Cont)

Page 7-4-49.1 7-4-50 7-4-50.1 7-4-51 7-4-51.1 7-4-52 7-4-52.1 7-4-53 7-4-53.1 7-4-54 7-4-54.1 7-4-55 7-4-55.1 7-4-56 7-4-56.1 7-4-57 7-4-57.1 7-4-58 7-4-58.1 7-4-59 7-4-59.1 7-4-59.2 7-4-60 7-4-60.1 7-4-61 7-4-61.1 7-4-62 7-4-62.1 7-4-63 7-4-63.1 7-4-64 7-4-64.1 7-4-65 7-4-65.1 7-4-65.2

7-4-49-2 7-4-50-1 7-4-50-1 7-4-51-1 7-4-51-1 7-4-52-1 7-4-52-2 7-4-53-1 7-4-53-1 7-4-54-1 7-4-54-1 7-4-55-1 7-4-55-1 7-4-56-1 7-4-56-1 7-4-57-1 7-4-57-1 7-4-58-1 7-4-58-1 7-4-59-1 7-4-59-1 7-4-59-2 7-4-60-1 7-4-60-1 7-4-61-1 7-4-61-1 7-4-62-1 7-4-62-1 7-4-63-1 7-4-63-1 7-4-64-1 7-4-64-1 7-4-65-1 7-4-65-1

7-4-65.3 7-4-65.4 7-4-66 7-4-66.1

Replace Hydraulic System Rigid Tubing............................................................ HYDRAULIC SYSTEM FLEX HOSES. ........................................................... Replace Hydraulic System Flex Hoses. .............................................................. HYDRAULIC SYSTEM DRAIN LINES. ........................................................ Replace Hydraulic System Drain Lines. ............................................................. APU ACCUMULATOR...................................................................................... Replace APU Accumulator.................................................................................. APU START VALVE. ........................................................................................ Replace APU Start Valve. ................................................................................... APU ACCUMULATOR HANDPUMP. ............................................................. Replace APU Accumulator Handpump............................................................... HYDRAULIC REFILL HANDPUMP................................................................ Replace Hydraulic Refill Handpump................................................................... HYDRAULIC REFILL HANDPUMP FILTER. ................................................ Replace Hydraulic Refill Handpump Filter......................................................... APU START CHECK VALVE RESTRICTOR................................................. Replace APU Start Check Valve Restrictor. ...................................................... APU ACCUMULATOR PRESSURE SWITCH. ............................................... Replace APU Accumulator Pressure Switch. ..................................................... APU ACCUMULATOR PRESSURE GAGE. ................................................... Replace APU Accumulator Pressure Gage. ........................................................ Replace APU Accumulator Pressure Gage Servicing Valve. ............................ APU START TEE CHECK VALVE.................................................................. Replace APU Start Tee Check Valve. ................................................................ APU START HYDRAULIC FLEX HOSES...................................................... Replace APU Start Hydraulic Flex Hoses. ......................................................... APU START HYDRAULIC RIGID TUBING LINES...................................... Replace APU Start Hydraulic Rigid Tubing Lines. ........................................... HYDRAULIC SYSTEM SELECTOR VALVE. ................................................ Replace Hydraulic System Selector Valve. ........................................................ HYDRAULIC SYSTEM SELECTOR VALVE FILL LINES........................... Replace Hydraulic System Selector Valve Fill Lines. ....................................... BLEED HYDRAULIC SYSTEM. ...................................................................... General. ................................................................................................................ Bleeding After Replacing Any Servo, Module, Manifold, Tubing, Hose, or Disconnect. ........................................................................................................... Hydraulic Pump Module Bleeding...................................................................... Bleeding System After Maintenance................................................................... FLUSH HYDRAULIC SYSTEM. ...................................................................... Flush Hydraulic System.......................................................................................

Section 7-5 7-5-1 7-5-1.1 7-5-2

MAINTENANCE PROCEDURES (BENCH).................................................... BLEED-AIR SHUTOFF VALVE (BENCH). .................................................... Clean/Repair Bleed-Air Shutoff Valve (BENCH). ............................................. SELECTOR VALVE (BENCH). ........................................................................

7-5-1 7-5-1-1 7-5-1-1 7-5-2-1

Change 10

7-4-65-2 7-4-65-3 7-4-65-4 7-4-66-1 7-4-66-2

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Page 7-5-2.1 7-5-2.2 7-5-3

7-5-2-1 7-5-2-4

7-5-3.1 7-5-4 7-5-4.1 7-5-5 7-5-5.1 7-5-6 7-5-6.1 7-5-7 7-5-7.1 7-5-8 7-5-8.1 7-5-9 7-5-9.1 7-5-10 7-5-10.1

Repair Selector Valve (BENCH)......................................................................... Test Selector Valve (BENCH). ........................................................................... HYDRAULIC PUMP MODULE LOW LEVEL SWITCH CONNECTOR (BENCH).............................................................................................................. Replace Hydraulic Pump Module Low Level Switch Connector (BENCH). ... HYDRAULIC PUMP MODULE LOW LEVEL SWITCH (BENCH). ............ Replace/Adjust Hydraulic Pump Module Low Level Switch (BENCH)........... HYDRAULIC PUMP MODULE SHAFT SEALS (BENCH)........................... Replace Hydraulic Pump Module Shaft Seals (BENCH). ................................. HYDRAULIC PUMP MODULE ELECTRICAL SOLENOID (BENCH). ...... Replace Hydraulic Pump Module Electrical Solenoid (BENCH)...................... MANIFOLD SHIMS (BENCH).......................................................................... Replace Manifold Shims (BENCH). ................................................................... HYDRAULIC SYSTEM RIGID TUBING (BENCH). ...................................... Repair Hydraulic System Rigid Tubing (BENCH). ........................................... APU ACCUMULATOR START VALVE FITTINGS (BENCH). ................... Replace APU Accumulator Start Valve Fittings (BENCH)............................... PRESSURE REDUCER INDICATOR (BENCH). ............................................ Replace Pressure Reducer Indicator (BENCH). .................................................

CHAPTER 8

INSTRUMENT SYSTEMS .................................................................................

8-1

Section 8-1 8-1-1 8-1-1.1 8-1-1.2 8-1-1.3 8-1-1.4 8-1-1.5 8-1-1.6 8-1-1.7 8-1-2 8-1-2.1 8-1-2.2 8-1-2.3 8-1-2.4 8-1-2.5 8-1-2.6 8-1-2.7 8-1-2.8 8-1-3 8-1-3.1 8-1-3.2 8-1-3.3 8-1-3.4

EQUIPMENT DESCRIPTION AND DATA ..................................................... FLIGHT INSTRUMENTS DESCRIPTION AND DATA................................. Flight Instruments Description. ........................................................................... Barometric Altimeters.......................................................................................... Airspeed Indicators. ............................................................................................. Vertical Speed Indicators..................................................................................... Pitot-Static Pressure System. ............................................................................... Pitot-Static Head Assembly. ................................................................................ Pitot-Static Heater System. .................................................................................. MISCELLANEOUS INSTRUMENTS DESCRIPTION AND DATA.............. Stabilator Position Indicator. ............................................................................... Stabilator Position Placard................................................................................... Standby Magnetic Compass................................................................................. Eight-Day Clock. ................................................................................................. Digital Clock. ....................................................................................................... Miscellaneous Switch Panel. ............................................................................... Free-Air Thermometer. ........................................................................................ Engine Instruments. ............................................................................................. INSTRUMENT DISPLAY SYSTEM DESCRIPTION AND DATA. .............. System Description. ............................................................................................. Power Distribution. .............................................................................................. Faceplate Lighting................................................................................................ Sensor Signal Processing. ....................................................................................

8-1-1 8-1-1-1 8-1-1-1 8-1-1-1 8-1-1-1 8-1-1-1 8-1-1-1 8-1-1-2 8-1-1-2 8-1-2-1 8-1-2-1 8-1-2-1 8-1-2-1 8-1-2-1 8-1-2-1 8-1-2-1 8-1-2-1 8-1-2-1 8-1-3-1 8-1-3-1 8-1-3-1 8-1-3-1 8-1-3-1

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Change 10

7-5-3-1 7-5-3-1 7-5-4-1 7-5-4-2 7-5-5-1 7-5-5-1 7-5-6-1 7-5-6-1 7-5-7-1 7-5-7-1 7-5-8-1 7-5-8-1 7-5-9-1 7-5-9-1 7-5-10-1 7-5-10-1

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TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 8-1-3.5 8-1-3.6 8-1-4 8-1-4.1 8-1-4.2 8-1-4.3 8-1-4.4 8-1-4.5 8-1-4.6 8-1-4.7 8-1-4.8 8-1-4.9 8-1-4.10 8-1-4.11 8-1-5 8-1-5.1 8-1-6 8-1-6.1 8-1-7 8-1-7.1 8-1-7.2 8-1-7.3

Display Lighting Control. .................................................................................... System Interface................................................................................................... SIGNAL DATA CONVERTER DESCRIPTION AND DATA........................ Signal Data Converter Description...................................................................... Lamp Power Supply (A2).................................................................................... Logic Power Supply (A3).................................................................................... Interface No. 4 Module (A4)............................................................................... Interface No. 3 Module (A5)............................................................................... Interface No. 2 Module (A6)............................................................................... Interface No. 1 Module (A7)............................................................................... Analog Processor No. 2 Module (A8). ............................................................... Analog Processor No. 1 Module (A9). ............................................................... Digital Processor Module (A10). ........................................................................ Voltage Regulator Module (A11)........................................................................ CENTRAL DISPLAY UNIT DESCRIPTION AND DATA............................. Central Display Unit. ........................................................................................... PILOT’S DISPLAY UNIT DESCRIPTION AND DATA. ............................... Pilot’s Display Unit. ............................................................................................ CAUTION/ADVISORY WARNING SYSTEM DESCRIPTION AND DATA. .................................................................................................................. System Description. ............................................................................................. System Operation. ................................................................................................ Caution/Advisory Panel. ......................................................................................

8-1-7-1 8-1-7-1 8-1-7-7 8-1-7-9

Section 8-2 8-2-1 8-2-2 8-2-3 8-2-3.1 8-2-3.2 8-2-3.3 8-2-3.4 8-2-3.5 8-2-3.6 8-2-3.7 8-2-3.8 8-2-3.9 8-2-3.10 8-2-3.11 8-2-3.12 8-2-3.13 8-2-3.14 8-2-4 8-2-5 8-2-6

TROUBLESHOOTING ....................................................................................... PITOT-STATIC SYSTEM. ................................................................................. PITOT HEATER.................................................................................................. INSTRUMENT DISPLAY SYSTEM. ................................................................ Setup. .................................................................................................................... % RPM R (Main Rotor Speed). .......................................................................... FUEL QTY (Fuel Quantity). ............................................................................... ENG OIL PRESS (Engine Oil Pressure). ........................................................... ENG OIL TEMP (Engine Oil Temperature). ..................................................... Ng SPEED (Engine Gas Generator Tachometer). .............................................. % TRQ (Engine Torque). .................................................................................... XMSN PRESS (Transmission Oil Pressure)....................................................... XMSN TEMP (Transmission Oil Temperature)................................................. % RPM 1-2 (Engine Power Turbine Tachometer). ............................................ TGT TEMP (Turbine Gas Temperature). ........................................................... Lamp Power Supply. ........................................................................................... Faceplate Lighting................................................................................................ Shutdown.............................................................................................................. CAUTION/ADVISORY WARNING SYSTEM................................................. DIGITAL CLOCK. .............................................................................................. CENTRAL DISPLAY UNIT (70450-01043-122) (BENCH). ...........................

8-2-1 8-2-1-1 8-2-2-1 8-2-3-1 8-2-3-1 8-2-3-5 8-2-3-6 8-2-3-8 8-2-3-9 8-2-3-10 8-2-3-12 8-2-3-13 8-2-3-14 8-2-3-15 8-2-3-17 8-2-3-18 8-2-3-19 8-2-3-20 8-2-4-1 8-2-5-1 8-2-6-1

Change 10

8-1-3-2 8-1-3-2 8-1-4-1 8-1-4-1 8-1-4-1 8-1-4-1 8-1-4-1 8-1-4-2 8-1-4-2 8-1-4-2 8-1-4-3 8-1-4-3 8-1-4-3 8-1-4-3 8-1-5-1 8-1-5-1 8-1-6-1 8-1-6-1

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Page 8-2-7 8-2-8 8-2-9 8-2-10 8-2-11

CENTRAL DISPLAY UNIT (70450-01916-105) (BENCH). ........................... PILOTS DISPLAY UNIT (BENCH).................................................................. SIGNAL DATA CONVERTER (BENCH). ....................................................... CAUTION/ADVISORY PANEL (BENCH)....................................................... MISCELLANEOUS SWITCH PANEL (BENCH). ...........................................

8-2-7-1 8-2-8-1 8-2-9-1 8-2-10-1 8-2-11-1

Section 8-3

ON AIRCRAFT INSPECTIONS - NOT APPLICABLE...................................

8-3-1

Section 8-4 8-4-1 8-4-1.1 8-4-2 8-4-2.1 8-4-3 8-4-3.1 8-4-4 8-4-4.1 8-4-5 8-4-5.1 8-4-6 8-4-6.1 8-4-7 8-4-7.1 8-4-8 8-4-8.1 8-4-9 8-4-9.1 8-4-10 8-4-10.1 8-4-11 8-4-11.1 8-4-12

MAINTENANCE PROCEDURES ..................................................................... PITOT-STATIC HEAD. ...................................................................................... Replace Pitot-Static Head. ................................................................................... PITOT-STATIC HEAD SUPPORT 70571−70693 ........................................... Replace Pitot-Static Head Support. ..................................................................... PITOT-STATIC LINES AND COMPONENTS. ............................................... Replace Pitot-Static Lines and Components. ...................................................... VERTICAL SPEED INDICATOR. .................................................................... Replace Vertical Speed Indicator. ....................................................................... AIRSPEED INDICATOR.................................................................................... Replace Airspeed Indicator.................................................................................. BAROMETRIC ALTIMETER............................................................................ Replace Barometric Altimeter. ............................................................................ STANDBY COMPASS. ...................................................................................... Replace Standby Compass................................................................................... STANDBY COMPASS LAMP SLS .............................................................. Replace Standby Compass Lamp. ....................................................................... STANDBY COMPASS LIGHT SWITCH. ........................................................ Replace Standby Compass Light Switch. ........................................................... CENTRAL DISPLAY UNIT............................................................................... Replace Central Display Unit.............................................................................. CENTRAL DISPLAY UNIT FACEPLATE AND EMI SHIELD. ................... Replace Central Display Unit Faceplate and EMI Shield.................................. CENTRAL DISPLAY UNIT BAR GRAPH FILAMENT LAMPS AND DIRECT VIEW FILAMENT MODULES EMEP .......................................... Replace Central Display Unit Bar Graph Filament Lamps and Direct View Filament Modules. ............................................................................................... CENTRAL DISPLAY UNIT FUSES. ................................................................ Replace Central Display Unit Fuses. .................................................................. CENTRAL DISPLAY UNIT LAMP ASSEMBLY W/O EMEP ................... Replace Central Display Unit Lamp Assembly.................................................. SIGNAL DATA CONVERTER, NO. 1 AND NO. 2........................................ Replace Signal Data Converter, No. 1 and No. 2. ............................................. PILOT DISPLAY UNIT...................................................................................... Replace Pilot Display Unit. ................................................................................. PILOT DISPLAY UNIT FACEPLATE AND EMI SHIELD. .......................... Replace Pilot Display Unit Faceplate and EMI Shield. .....................................

8-4-1 8-4-1-1 8-4-1-1 8-4-2-1 8-4-2-1 8-4-3-1 8-4-3-1 8-4-4-1 8-4-4-1 8-4-5-1 8-4-5-1 8-4-6-1 8-4-6-1 8-4-7-1 8-4-7-1 8-4-8-1 8-4-8-1 8-4-9-1 8-4-9-1 8-4-10-1 8-4-10-1 8-4-11-1 8-4-11-1

8-4-12.1 8-4-13 8-4-13.1 8-4-14 8-4-14.1 8-4-15 8-4-15.1 8-4-16 8-4-16.1 8-4-17 8-4-17.1 V4-xiv

Change 10

8-4-12-1 8-4-12-1 8-4-13-1 8-4-13-1 8-4-14-1 8-4-14-1 8-4-15-1 8-4-15-1 8-4-16-1 8-4-16-1 8-4-17-1 8-4-17-1

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TABLE OF CONTENTS (Cont)

Page 8-4-18 8-4-18.1 8-4-19 8-4-19.1 8-4-20 8-4-20.1 8-4-21 8-4-21.1 8-4-22 8-4-22.1 8-4-23 8-4-23.1 8-4-24 8-4-24.1 8-4-25 8-4-25.1 8-4-26 8-4-26.1 8-4-27 8-4-27.1 8-4-28 8-4-28.1 8-4-29 8-4-29.1 8-4-30 8-4-30.1 8-4-30.2 8-4-31 8-4-31.1 8-4-32 8-4-32.1 Section 8-5 8-5-1 8-5-1.1 8-5-2 8-5-2.1 8-5-3 8-5-3.1

PILOT DISPLAY UNIT BAR GRAPH FILAMENT LAMPS AND DIRECT VIEW FILAMENT MODULES EMEP .......................................... Replace Pilot Display Unit Bar Graph Filament Lamps and Direct View Filament Modules. ............................................................................................... CAUTION/ADVISORY PANEL. ....................................................................... Replace Caution/Advisory Panel. ........................................................................ CAUTION/ADVISORY PANEL LAMPS. ........................................................ Replace Caution/Advisory Panel Lamps............................................................. CAUTION/ADVISORY PANEL CAPSULE PARTS. ...................................... Replace Caution/Advisory Panel Capsule Parts. ................................................ CAUTION/ADVISORY SYSTEM AND MASTER WARNING DIMMING CONTROLS. ........................................................................................................ Replace Caution/Advisory System and Master Warning Dimming Controls. .. CAUTION/ADVISORY AUDIBLE WARNING UNIT.................................... Replace Caution/Advisory Audible Warning Unit. ............................................ MASTER WARNING PANEL. .......................................................................... Replace Master Warning Panel. .......................................................................... MASTER WARNING PANEL LAMPS. ........................................................... Replace Master Warning Panel Lamps. .............................................................. MASTER WARNING PANEL CAPSULE........................................................ Replace Master Warning Panel Capsule Parts.................................................... MASTER WARNING DIMMING CONTROL. ................................................ Replace Master Warning Dimming Control. ...................................................... CLOCK. ............................................................................................................... Replace Clock. ..................................................................................................... CLOCK BATTERY............................................................................................. Replace Clock Battery. ........................................................................................ FREE-AIR THERMOMETER. ........................................................................... Replace Free-Air Thermometer. .......................................................................... Replace Free-Air Thermometer Bonding Jumper HCW . ................................ ROTOR OVERSPEED RESET SWITCH.......................................................... Replace Rotor Overspeed Reset Switch.............................................................. 70006−70720 ...................................... CHIP DETECTOR RESISTOR UNIT Replace Chip Detector Resistor Unit. ................................................................. MAINTENANCE PROCEDURES (BENCH).................................................... CENTRAL DISPLAY UNIT DISPLAY LAMP DRIVER MODULES (BENCH).............................................................................................................. Replace Central Display Unit Display Lamp Driver Modules (BENCH)......... CENTRAL DISPLAY UNIT VOLTAGE REGULATOR AND INTERFACE MODULES (BENCH).................................................................. Replace Central Display Unit Voltage Regulator and Interface Modules (BENCH).............................................................................................................. CENTRAL DISPLAY UNIT DIGITAL READOUT MODULE (BENCH)..... Replace Central Display Unit Digital Readout Module (BENCH). ..................

Change 10

8-4-18-1 8-4-18-1 8-4-19-1 8-4-19-1 8-4-20-1 8-4-20-1 8-4-21-1 8-4-21-1 8-4-22-1 8-4-22-1 8-4-23-1 8-4-23-1 8-4-24-1 8-4-24-1 8-4-25-1 8-4-25-1 8-4-26-1 8-4-26-1 8-4-27-1 8-4-27-1 8-4-28-1 8-4-28-1 8-4-29-1 8-4-29-1 8-4-30-1 8-4-30-1 8-4-30-3 8-4-31-1 8-4-31-1 8-4-32-1 8-4-32-1 8-5-1 8-5-1-1 8-5-1-1 8-5-2-1 8-5-2-1 8-5-3-1 8-5-3-1

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SIGNAL DATA CONVERTER MODULES (BENCH). ................................. Replace Signal Data Converter Modules (BENCH)........................................... SIGNAL DATA CONVERTER LAMP POWER SUPPLY (BENCH). ........... Replace Signal Data Converter Lamp Power Supply (BENCH). ...................... SIGNAL DATA CONVERTER LOGIC POWER SUPPLY (BENCH). ......... Replace Signal Data Converter Logic Power Supply (BENCH). ...................... PILOT DISPLAY UNIT, 70450-01043-121 AND 70450-01043-123, DRIVER MODULES/LAMPS (BENCH)........................................................... Replace Pilot Display Unit, 70450-01043-121 and 70450-01043-123, Driver Modules/Lamps (BENCH)................................................................................... PILOT DISPLAY UNIT, 70450-01043-124 AND 70450-01916-104, DRIVER MODULES (BENCH). ........................................................................ Replace Pilot Display Unit, 70450-01043-124 and 70450-01916-104, Driver Modules (BENCH)............................................................................................... PILOT DISPLAY UNIT, 70450-01043-121 AND 70450-01043-123, TORQUE DISPLAY ANALOG MODULES/LAMPS (BENCH)..................... Replace Pilot Display Unit, 70450-01043-121 and 70450-01043-123, Torque Display Analog Modules/Lamps (BENCH)........................................................ PILOT DISPLAY UNIT, 70450-01043-124 AND 70450-01916-104, TORQUE DISPLAY ANALOG MODULES (BENCH). .................................. Replace Pilot Display Unit, 70450-01043-124 and 70450-01916-104, Torque Display Analog Modules (BENCH).................................................................... PILOT DISPLAY UNIT TORQUE DISPLAY/DIGITAL READOUT MODULE (BENCH). .......................................................................................... Replace Pilot Display Unit Torque Display/Digital Readout Module (BENCH).............................................................................................................. PILOT DISPLAY UNIT AUTODIM MODULE (BENCH). ............................ Replace Pilot Display Unit Autodim Module (BENCH). .................................. PILOT DISPLAY UNIT NVG FILTERS (BENCH). ........................................ Replace Pilot Display Unit NVG Filters (BENCH). .......................................... CAUTION/ADVISORY PANEL CHANNEL/CONTROL CARDS (BENCH).............................................................................................................. Replace Caution/Advisory Panel Channel/Control Cards (BENCH)................. CAUTION/ADVISORY PANEL TEST SWITCH (BENCH). .......................... Replace Caution/Advisory Panel Test Switch (BENCH)................................... CAUTION/ADVISORY PANEL HEAT SINK/TRANSISTORS (BENCH).... Replace Caution/Advisory Panel Heat Sink/Transistors (BENCH). .................. CAUTION/ADVISORY PANEL RELAY, K1 (BENCH)................................. Replace Caution/Advisory Panel Relay, K1 (BENCH)...................................... CAUTION/ADVISORY PANEL DIODE, CR1 (BENCH). .............................. Replace Caution/Advisory Panel Diode, CR1 (BENCH)................................... CAUTION/ADVISORY PANEL DIODE, CR2 (BENCH). .............................. Replace Caution/Advisory Panel Diode, CR2 (BENCH)................................... CAUTION/ADVISORY PANEL DIODE, CR3 (BENCH). .............................. Replace Caution/Advisory Panel Diode, CR3 (BENCH)...................................

Change 10

8-5-4-1 8-5-4-1 8-5-5-1 8-5-5-1 8-5-6-1 8-5-6-1 8-5-7-1 8-5-7-1 8-5-8-1 8-5-8-1 8-5-9-1 8-5-9-1 8-5-10-1 8-5-10-1 8-5-11-1 8-5-11-1 8-5-12-1 8-5-12-1 8-5-13-1 8-5-13-1 8-5-14-1 8-5-14-1 8-5-15-1 8-5-15-1 8-5-16-1 8-5-16-1 8-5-17-1 8-5-17-1 8-5-18-1 8-5-18-1 8-5-19-1 8-5-19-1 8-5-20-1 8-5-20-1

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TABLE OF CONTENTS (Cont)

Page 8-5-21 8-5-21.1 8-5-22 8-5-22.1 8-5-22.2 8-5-22.3

CAUTION/ADVISORY PANEL CONNECTORS (BENCH)........................... Replace Caution/Advisory Panel Connectors (BENCH).................................... CHIP DETECTOR RESISTOR UNIT (BENCH). ............................................. Replace Chip Detector Resistor Unit Resistors (BENCH)................................. Replace Chip Detector Resistor Unit Diode, CR1 (BENCH)............................ Replace Chip Detector Resistor Unit Connector, J3 (BENCH).........................

Change 10

8-5-21-1 8-5-21-1 8-5-22-1 8-5-22-1 8-5-22-3 8-5-22-4

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This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

VOLUME

5

TABLE OF CONTENTS Page CHAPTER 9

ELECTRICAL SYSTEMS ..................................................................................

9-1

Section 9-1 9-1-1 9-1-1.1 9-1-1.2 9-1-1.3 9-1-1.4 9-1-1.5 9-1-1.6 9-1-1.7 9-1-1.8 9-1-1.9 9-1-1.10 9-1-1.11 9-1-1.12 9-1-1.13 9-1-1.14 9-1-1.15 9-1-1.16 9-1-1.17 9-1-2 9-1-2.1 9-1-2.2 9-1-2.3 9-1-2.4 9-1-2.5 9-1-3

EQUIPMENT DESCRIPTION AND DATA ..................................................... AC ELECTRICAL SYSTEM DESCRIPTION AND DATA............................ AC Electrical System Description....................................................................... Generator Control Units....................................................................................... Generator Control Switches................................................................................. Junction Boxes. .................................................................................................... Generator Contactors. .......................................................................................... APU/External Power Contactors. ........................................................................ AC Bus Tie Contactor. ........................................................................................ Current Transformers. .......................................................................................... Current Limiters. .................................................................................................. Test Receptacles................................................................................................... AC Essential Bus Transfer Relay........................................................................ AC Essential Bus Fail Relay. .............................................................................. External Power Receptacle. ................................................................................. External Power Monitor Panel. ........................................................................... External Power Control Switch. .......................................................................... No. 1 and No. 2 Generators. ............................................................................... APU Generator..................................................................................................... AC ELECTRICAL PRIMARY SYSTEM DESCRIPTION AND DATA. ....... Primary AC Power System.................................................................................. Primary AC Power Distribution. ......................................................................... Power Generation................................................................................................. No. 1 and No. 2 Generator Description.............................................................. No. 1 and No. 2 Generator Operation................................................................. AC ELECTRICAL AUXILIARY POWER SYSTEM DESCRIPTION AND DATA. .................................................................................................................. Auxiliary Power Unit (APU) Generator Description. ........................................ Auxiliary AC Power System. .............................................................................. Auxiliary Power Distribution............................................................................... AC ELECTRICAL EXTERNAL POWER SYSTEM DESCRIPTION AND DATA. .................................................................................................................. External Power Distribution. ............................................................................... External Power Operation.................................................................................... DC ELECTRICAL SYSTEM DESCRIPTION AND DATA............................ DC Electrical System Description.......................................................................

9-1-1 9-1-1-1 9-1-1-1 9-1-1-1 9-1-1-2 9-1-1-2 9-1-1-2 9-1-1-2 9-1-1-3 9-1-1-3 9-1-1-3 9-1-1-3 9-1-1-3 9-1-1-4 9-1-1-4 9-1-1-4 9-1-1-4 9-1-1-4 9-1-1-5 9-1-2-1 9-1-2-1 9-1-2-1 9-1-2-1 9-1-2-2 9-1-2-2

9-1-3.1 9-1-3.2 9-1-3.3 9-1-4 9-1-4.1 9-1-4.2 9-1-5 9-1-5.1

9-1-3-1 9-1-3-1 9-1-3-1 9-1-3-1 9-1-4-1 9-1-4-1 9-1-4-1 9-1-5-1 9-1-5-1

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Page 9-1-5.2 9-1-5.3 9-1-5.4 9-1-5.5 9-1-5.6 9-1-5.7 9-1-5.8 9-1-5.9 9-1-6 9-1-6.1 9-1-6.2 9-1-7 9-1-7.1 9-1-7.2 9-1-7.3 9-1-7.4 9-1-8 9-1-8.1 9-1-8.2 9-1-8.3 9-1-8.4 9-1-8.5 9-1-8.6 9-1-8.7 9-1-8.8 9-1-8.9 9-1-8.10 9-1-8.11 9-1-8.12 9-1-9 9-1-9.1 9-1-9.2 9-1-9.3 9-1-9.4 9-1-9.5 9-1-9.6 9-1-9.7 9-1-9.8 9-1-9.9 9-1-9.10 9-1-9.11 9-1-9.12

Converters. ........................................................................................................... Junction Boxes. .................................................................................................... DC Primary Bus Contactors. ............................................................................... DC Bus Tie Contactor. ........................................................................................ DC Bus Tie Current Limiter. .............................................................................. No. 1 DC Essential Bus Supply Relay. .............................................................. No. 2 DC Essential Bus Supply Relay. .............................................................. DC Essential Bus Fail Relay. .............................................................................. DC ELECTRICAL PRIMARY SYSTEM DESCRIPTION AND DATA. ....... DC Primary Power System.................................................................................. Converter Operation............................................................................................. DC ELECTRICAL BATTERY SYSTEM DESCRIPTION AND DATA. ....... Battery. ................................................................................................................. Battery Switch...................................................................................................... Battery Relay........................................................................................................ Battery System Operation.................................................................................... INTERIOR LIGHTING DESCRIPTION AND DATA. .................................... Interior Lighting. .................................................................................................. Instrument Panel Lights. ...................................................................................... Console Lighting W/O SLS . ............................................................................. Console Lighting SLS . ..................................................................................... Instrument Panel and Consoles Indicator Lights Dimming W/O SLS ............ Instrument Panel and Console Indicator Lights Dimming SLS . .................... Cabin Dome Lights W/O SLS . ......................................................................... Cabin Dome Lights SLS . ................................................................................. Cockpit Flood and Secondary Lights W/O SLS . ............................................. Cockpit Flood and Secondary Lights SLS . ..................................................... Utility and Maintenance Lights W/O SLS . ...................................................... Utility and Maintenance Lights SLS . .............................................................. EXTERIOR LIGHTING DESCRIPTION AND DATA. ................................... Exterior Lighting.................................................................................................. Formation Lights W/O SLS ............................................................................. Formation Lights SLS . ..................................................................................... Anticollision Lights.............................................................................................. Position Lights W/O SLS .................................................................................. Position Lights SLS .......................................................................................... Retractable Landing Light. .................................................................................. Controllable Searchlight W/O SLS . ................................................................ Controllable Searchlight SLS . ........................................................................ Cargo Hook Lights W/O SLS . ........................................................................ Cargo Hook Lights SLS . ................................................................................ Auxiliary Controllable Searchlight......................................................................

9-1-5-1 9-1-5-1 9-1-5-2 9-1-5-2 9-1-5-2 9-1-5-2 9-1-5-2 9-1-5-3 9-1-6-1 9-1-6-1 9-1-6-1 9-1-7-1 9-1-7-1 9-1-7-1 9-1-7-1 9-1-7-1 9-1-8-1 9-1-8-1 9-1-8-1 9-1-8-1 9-1-8-2 9-1-8-2 9-1-8-3 9-1-8-4 9-1-8-4 9-1-8-4 9-1-8-5 9-1-8-5 9-1-8-6 9-1-9-1 9-1-9-1 9-1-9-1 9-1-9-1 9-1-9-1 9-1-9-2 9-1-9-2 9-1-9-3 9-1-9-3 9-1-9-3 9-1-9-4 9-1-9-4 9-1-9-4

Section 9-2

TROUBLESHOOTING .......................................................................................

9-2-1

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Page 9-2-1 9-2-1.1 9-2-1.2 9-2-1.3 9-2-1.4 9-2-1.5 9-2-1.6 9-2-1.7 9-2-1.8 9-2-2 9-2-2.1 9-2-2.2 9-2-2.3 9-2-2.4 9-2-2.5 9-2-3 9-2-3.1 9-2-4 9-2-4.1 9-2-5 9-2-5.1 9-2-6 9-2-6.1 9-2-7 9-2-7.1 9-2-8 9-2-8.1 9-2-9 9-2-9.1 9-2-10 9-2-10.1 9-2-11 9-2-11.1 9-2-12 9-2-12.1 9-2-13 9-2-13.1 9-2-14 9-2-14.1 9-2-15 9-2-15.1 9-2-16 9-2-16.1

AC ELECTRICAL SYSTEM.............................................................................. APU Generator System........................................................................................ No. 1 Generator System. ..................................................................................... No. 2 Generator System. ..................................................................................... AC External Power System. ................................................................................ 26 VAC Power System........................................................................................ UTIL RCPT 115 VAC 3ø 400 Hz Receptacle. .................................................. 60 Hz AC Converter Receptacle. ........................................................................ Generator and GCU Troubleshooting. ................................................................ DC ELECTRICAL SYSTEM.............................................................................. Battery. ................................................................................................................. No. 1 Converter.................................................................................................... No. 2 Converter.................................................................................................... Utility DC............................................................................................................. Battery Low Sensing 702375 − SUBQ ................................................................. SYSTEM CIRCUIT BREAKERS....................................................................... Operational/Troubleshooting Procedure. ............................................................. INSTRUMENT PANEL LIGHTS....................................................................... Operational/Troubleshooting Procedure. ............................................................. UPPER AND LOWER CONSOLE LIGHTS W/O SLS ................................ Operational/Troubleshooting Procedure. ............................................................. CABIN DOME LIGHTS. .................................................................................... Operational/Troubleshooting Procedure. ............................................................. COCKPIT FLOOD AND SECONDARY LIGHTS. .......................................... Operational/Troubleshooting Procedure .............................................................. COCKPIT FLOOD AND SECONDARY LIGHTS W/O SLS ...................... Operational/Troubleshooting Procedure. ............................................................. UTILITY AND MAINTENANCE LIGHTS. ..................................................... Operational/Troubleshooting Procedure. ............................................................. INSTRUMENT PANEL AND CONSOLES INDICATOR LIGHTS DIMMING SLS ....................................................................................................... Operational/Troubleshooting Procedure. ............................................................. INSTRUMENT PANEL AND CONSOLES INDICATOR LIGHTS DIMMING W/O SLS ................................................................................................ Operational/Troubleshooting Procedure. ............................................................. FORMATION LIGHTS....................................................................................... Operational/Troubleshooting Procedure. ............................................................. CONTROLLABLE SEARCHLIGHT. ................................................................ Operational/Troubleshooting Procedure. ............................................................. POSITION LIGHTS. ........................................................................................... Operational/Troubleshooting Procedure. ............................................................. RETRACTABLE LANDING LIGHT................................................................. Operational/Troubleshooting Procedure. ............................................................. ANTICOLLISION LIGHTS................................................................................ Operational/Troubleshooting Procedure. ............................................................. Change 10

9-2-1-1 9-2-1-2 9-2-1-3 9-2-1-3 9-2-1-4 9-2-1-5 9-2-1-5 9-2-1-5 9-2-1-6 9-2-2-1 9-2-2-1 9-2-2-3 9-2-2-3 9-2-2-4 9-2-2-4 9-2-3-1 9-2-3-1 9-2-4-1 9-2-4-1 9-2-5-1 9-2-5-1 9-2-6-1 9-2-6-1 9-2-7-1 9-2-7-1 9-2-8-1 9-2-8-1 9-2-9-1 9-2-9-1 9-2-10-1 9-2-10-1 9-2-11-1 9-2-11-1 9-2-12-1 9-2-12-1 9-2-13-1 9-2-13-1 9-2-14-1 9-2-14-1 9-2-15-1 9-2-15-1 9-2-16-1 9-2-16-1

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Page 9-2-17 9-2-17.1 9-2-18 9-2-18.1 9-2-19 9-2-19.1 9-2-19.2 9-2-19.3 9-2-19.4 9-2-19.5 9-2-19.6 9-2-19.7 9-2-20 9-2-20.1 9-2-20.2 9-2-20.3 9-2-20.4 9-2-20.5 9-2-21 9-2-21.1 9-2-22 9-2-22.1 9-2-22.2 9-2-22.3 9-2-22.4 9-2-22.5 9-2-22.6 9-2-22.7 9-2-22.8 9-2-22.9 9-2-22.10 9-2-22.11 9-2-22.12 9-2-23 9-2-23.1 9-2-23.2 9-2-23.3 9-2-23.4 9-2-23.5 9-2-24 9-2-24.1 9-2-25 9-2-25.1

V5-iv

CARGO HOOK LIGHTS W/O SLS ............................................................... Operational/Troubleshooting Procedure. ............................................................. FUEL BOOST PUMP CONTROL PANEL (BENCH). .................................... Operational/Troubleshooting Procedure. ............................................................. RIGHT RELAY PANEL (BENCH). .................................................................. T1 Current Sensor................................................................................................ K20 DC Essential Bus Fail Relay....................................................................... K21 Windshield Anti-ice Lockout Relay............................................................ K26 No. 2 Engine Start Relay. ........................................................................... K32 Hydraulic Accumulator Relay. .................................................................... K22 APU Surge Relay......................................................................................... Shutdown.............................................................................................................. LEFT RELAY PANEL (BENCH). ..................................................................... T1 Current Sensor................................................................................................ K41 Searchlight Relay, 70550-02105-048 and -050. ......................................... K41 Searchlight Relay, 70550-02105-051, -054, -057, and -058...................... K45 No. 1 Engine Start Relay. ........................................................................... Shutdown.............................................................................................................. AUXILIARY CONTROLLABLE SEARCHLIGHT.......................................... Operational/Troubleshooting Procedure. ............................................................. NICKEL CADMIUM BATTERY (BENCH). .................................................... Inspection. ............................................................................................................ Cleaning................................................................................................................ Electrolyte Level Check/Adjustment................................................................... Current Leakage Check. ...................................................................................... Topping Charge (Using PCA-131 50/60 Battery Analyzer/Charger). ............... Topping Charge (Using RF80-K Battery Analyzer/Charger)............................. Battery Harness Check......................................................................................... Clamping Diode Check........................................................................................ Discharge-Primary Method.................................................................................. Discharge-Alternate Method................................................................................ Normal Charge (Using PCA-131 50/60 Battery Analyzer/Charger). ................ Normal Charge (Using RF80-K Battery Analyzer/Charger).............................. SEALED LEAD ACID BATTERY (BENCH). ................................................. Inspection. ............................................................................................................ Cleaning................................................................................................................ Discharge.............................................................................................................. Normal Charge. .................................................................................................... Conditioning Charge. ........................................................................................... CARGO HOOK LIGHTS SLS ....................................................................... Operational/Troubleshooting Procedure. ............................................................. UPPER AND LOWER CONSOLE LIGHTS SLS ........................................ Operational/Troubleshooting Procedure. .............................................................

Change 10

9-2-17-1 9-2-17-1 9-2-18-1 9-2-18-1 9-2-19-1 9-2-19-1 9-2-19-1 9-2-19-2 9-2-19-2 9-2-19-3 9-2-19-3 9-2-19-3 9-2-20-1 9-2-20-1 9-2-20-1 9-2-20-2 9-2-20-2 9-2-20-3 9-2-21-1 9-2-21-1 9-2-22-1 9-2-22-2 9-2-22-3 9-2-22-3 9-2-22-4 9-2-22-5 9-2-22-5 9-2-22-6 9-2-22-7 9-2-22-7 9-2-22-9 9-2-22-10 9-2-22-11 9-2-23-1 9-2-23-1 9-2-23-2 9-2-23-2 9-2-23-3 9-2-23-4 9-2-24-1 9-2-24-1 9-2-25-1 9-2-25-1

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TABLE OF CONTENTS (Cont)

Page Section 9-3

ON AIRCRAFT INSPECTIONS - NOT APPLICABLE...................................

9-3-1

Section 9-4 9-4-1 9-4-1.1 9-4-2 9-4-2.1 9-4-3 9-4-3.1 9-4-4 9-4-4.1 9-4-5 9-4-5.1 9-4-6 9-4-6.1 9-4-7 9-4-7.1 9-4-8 9-4-8.1 9-4-9

MAINTENANCE PROCEDURES ..................................................................... CIRCUIT BREAKERS........................................................................................ Replace Circuit Breakers. .................................................................................... LEFT/RIGHT RELAY PANELS. ....................................................................... Replace Left/Right Relay Panels......................................................................... LEFT RELAY PANEL FUSES. ......................................................................... Replace Left Relay Panel Fuses.......................................................................... NO. 3 RELAY PANEL. ...................................................................................... Replace No. 3 Relay Panel.................................................................................. UPPER CONSOLE SWITCHES. ....................................................................... Replace Upper Console Switches........................................................................ UPPER CONSOLE INFORMATION PLATES................................................. Replace Upper Console Information Plates. ....................................................... MISCELLANEOUS SWITCH PANEL.............................................................. Replace Miscellaneous Switch Panel. ................................................................. MISCELLANEOUS SWITCH PANEL PUSHBUTTON LAMPS. .................. Replace Miscellaneous Switch Panel Pushbutton Lamps................................... MISCELLANEOUS SWITCH PANEL INFORMATION PLATE AND LAMPS................................................................................................................. Replace Miscellaneous Switch Panel Information Plate and Lamps. ................ AUTOTRANSFORMER, T12............................................................................. Replace Autotransformer, T12. ........................................................................... NO. 1 AC GENERATOR CONTACTOR, K1................................................... Replace No. 1 AC Generator Contactor, K1. ..................................................... NO. 2 AC GENERATOR CONTACTOR, K2................................................... Replace No. 2 AC Generator Contactor, K2. ..................................................... CURRENT LIMITERS, CL1 THROUGH CL9................................................. Replace Current Limiters, CL1 through CL9. .................................................... GENERATOR AND APU CURRENT TRANSFORMERS, T2, T3, AND T13........................................................................................................................ Replace Generator and APU Current Transformers, T2, T3, and T13.............. GENERATOR CONTROL UNITS..................................................................... Replace Generator Control Units. ....................................................................... MAIN GENERATORS........................................................................................ Replace Main Generators..................................................................................... APU/EXTERNAL POWER CONTACTOR, K3................................................ Replace APU/External Power Contactor, K3. .................................................... EXTERNAL POWER RECEPTACLE. .............................................................. Replace External Power Receptacle.................................................................... APU GENERATOR. ........................................................................................... Replace APU Generator....................................................................................... EXTERNAL POWER MONITOR PANEL. ...................................................... Replace External Power Monitor Panel. .............................................................

9-4-1 9-4-1-1 9-4-1-1 9-4-2-1 9-4-2-2 9-4-3-1 9-4-3-1 9-4-4-1 9-4-4-1 9-4-5-1 9-4-5-1 9-4-6-1 9-4-6-1 9-4-7-1 9-4-7-1 9-4-8-1 9-4-8-1

9-4-9.1 9-4-10 9-4-10.1 9-4-11 9-4-11.1 9-4-12 9-4-12.1 9-4-13 9-4-13.1 9-4-14 9-4-14.1 9-4-15 9-4-15.1 9-4-16 9-4-16.1 9-4-17 9-4-17.1 9-4-18 9-4-18.1 9-4-19 9-4-19.1 9-4-20 9-4-20.1

9-4-9-1 9-4-9-1 9-4-10-1 9-4-10-1 9-4-11-1 9-4-11-1 9-4-12-1 9-4-12-1 9-4-13-1 9-4-13-1 9-4-14-1 9-4-14-1 9-4-15-1 9-4-15-1 9-4-16-1 9-4-16-1 9-4-17-1 9-4-17-1 9-4-18-1 9-4-18-1 9-4-19-1 9-4-19-1 9-4-20-1 9-4-20-1

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Page 9-4-21 9-4-21.1 9-4-22 9-4-22.1 9-4-23 9-4-23.1 9-4-24 9-4-24.1 9-4-25 9-4-25.1 9-4-26 9-4-26.1 9-4-27 9-4-27.1 9-4-28 9-4-28.1 9-4-29 9-4-29.1 9-4-30 9-4-30.1 9-4-31 9-4-31.1 9-4-32 9-4-32.1 9-4-33 9-4-33.1 9-4-34 9-4-34.1 9-4-35 9-4-35.1 9-4-36 9-4-36.1 9-4-37 9-4-37.1 9-4-38 9-4-38.1 9-4-39 9-4-39.1 9-4-40 9-4-40.1 9-4-41 9-4-41.1 9-4-42 9-4-42.1

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AC BUS TIE CONTACTOR, K4....................................................................... Replace AC Bus Tie Contactor, K4.................................................................... AC ESSENTIAL BUS RELAYS, K8 AND K13. ............................................. Replace AC Essential Bus Relays, K8 and K13. ............................................... SECONDARY BUS CURRENT LIMITERS, CL16 THROUGH CL18. ......... Replace Secondary Bus Current Limiters, CL16 through CL18. ...................... AC SECONDARY BUS CONTACTOR, K11................................................... Replace AC Secondary Bus Contactor, K11. ..................................................... DIODES, CR13 AND CR14. .............................................................................. Replace Diodes, CR13 and CR14. ...................................................................... DIODES, CR17, CR18, CR19, AND CR20....................................................... Replace Diodes, CR17, CR18, CR19, and CR20............................................... DIODES, CR21, CR22, AND CR23. ................................................................. Replace Diodes, CR21, CR22, and CR23. ......................................................... JUNCTION BOX RELAYS, K80, K81, AND K82. ......................................... Replace Junction Box Relays, K80, K81, and K82. .......................................... TRANSFORMER, T11 (26 VAC). ..................................................................... Replace Transformer, T11 (26 vac). ................................................................... DC PRIMARY BUS CONTACTORS, K6 AND K16. ..................................... Replace DC Primary Bus Contactors, K6 and K16. .......................................... DC BUS TIE CONTACTOR, K15..................................................................... Replace DC Bus Tie Contactor, K15.................................................................. DC ESSENTIAL BUS SUPPLY RELAYS, K9 AND K10. ............................. Replace DC Essential Bus Supply Relays, K9 and K10.................................... BATTERY RELAY, K7...................................................................................... Replace Battery Relay, K7. ................................................................................. NICKEL-CADMIUM BATTERY 70583−702374 ............................................ Replace Nickel-Cadmium Battery. ...................................................................... BATTERY CONDITIONER/ANALYZER 70583−702374 ............................. Replace Battery Conditioner/Analyzer................................................................ CONVERTERS.................................................................................................... Replace Converters. ............................................................................................. DC CURRENT LIMITER. .................................................................................. Replace DC Current Limiter. .............................................................................. DC MONITOR BUS SUPPLY RELAY, K5. .................................................... Replace DC Monitor Bus Supply Relay, K5...................................................... APU ELECTRONIC SEQUENCE UNIT........................................................... Replace APU Electronic Sequence Unit. ............................................................ FUEL BOOST PUMP CONTROL PANEL. ...................................................... Replace Fuel Boost Pump Control Panel............................................................ FUEL BOOST PUMP CONTROL PANEL INFORMATION PLATE............ Replace Fuel Boost Pump Control Panel Information Plate.............................. FUEL BOOST PUMP CONTROL PANEL INDICATOR LIGHT LAMPS.... Replace Fuel Boost Pump Control Panel Indicator Light Lamps......................

Change 10

9-4-21-1 9-4-21-1 9-4-22-1 9-4-22-1 9-4-23-1 9-4-23-1 9-4-24-1 9-4-24-1 9-4-25-1 9-4-25-1 9-4-26-1 9-4-26-1 9-4-27-1 9-4-27-1 9-4-28-1 9-4-28-1 9-4-29-1 9-4-29-1 9-4-30-1 9-4-30-1 9-4-31-1 9-4-31-1 9-4-32-1 9-4-32-1 9-4-33-1 9-4-33-1 9-4-34-1 9-4-34-1 9-4-35-1 9-4-35-1 9-4-36-1 9-4-36-1 9-4-37-1 9-4-37-1 9-4-38-1 9-4-38-1 9-4-39-1 9-4-39-1 9-4-40-1 9-4-40-1 9-4-41-1 9-4-41-1 9-4-42-1 9-4-42-1

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TABLE OF CONTENTS (Cont)

Page 9-4-43 9-4-43.1 9-4-44 9-4-44.1 9-4-45 9-4-45.1 9-4-46 9-4-46.1 9-4-47 9-4-47.1 9-4-48 9-4-48.1 9-4-49 9-4-49.1 9-4-50 9-4-50.1 9-4-51 9-4-51.1 9-4-52 9-4-52.1 9-4-53 9-4-53.1 9-4-54 9-4-54.1 9-4-55 9-4-55.1 9-4-56 9-4-56.1 9-4-57 9-4-57.1 9-4-58 9-4-58.1 9-4-59 9-4-59.1 9-4-60 9-4-60.1 9-4-61 9-4-61.1 9-4-62 9-4-62.1 9-4-63 9-4-63.1 9-4-64 9-4-64.1

ENGINE PRIME BOOST DIODE BOARD. ..................................................... Replace Engine Prime Boost Diode Board......................................................... BACKUP HYDRAULIC PUMP MOTOR. ........................................................ Replace Backup Hydraulic Pump Motor. ........................................................... BACKUP HYDRAULIC PUMP MOTOR HOOD. ........................................... Replace Backup Hydraulic Pump Motor Hood. ................................................. BACKUP HYDRAULIC PUMP MOTOR FAN................................................ Replace Backup Hydraulic Pump Motor Fan. .................................................... BACKUP HYDRAULIC PUMP RELAY, K19................................................. Replace Backup Hydraulic Pump Relay, K19.................................................... REMOTE CIRCUIT BREAKER. ....................................................................... Replace Remote Circuit Breaker. ........................................................................ UPPER CONSOLE DIMMING CONTROLS.................................................... Replace Upper Console Dimming Controls........................................................ LIGHTED SWITCHES DIMMING CONTROL. .............................................. Replace Lighted Switches Dimming Control. .................................................... CABIN DOME DIMMING CONTROL............................................................. Replace Cabin Dome Dimming Control. ............................................................ INDICATOR LIGHTS DIMMER BOX. ............................................................ Replace Indicator Lights Dimmer Box. .............................................................. INDICATOR LIGHTS DIMMER BOX FUSE.................................................. Replace Indicator Lights Dimmer Box Fuse. ..................................................... CARGO HOOK EMERGENCY RELEASE SYSTEM RESISTOR, R4.......... Replace Cargo Hook Emergency Release System Resistor, R4. ....................... TRANSFORMER BOXES. ................................................................................. Replace Transformer Boxes................................................................................. CONTROLLABLE SEARCHLIGHT DIMMING CONTROL. ........................ Replace Controllable Searchlight Dimming Control. ......................................... RADAR ALTIMETER DIMMING CONTROL. ............................................... Replace Radar Altimeter Dimming Control. ...................................................... DIMMING CONTROL POWER SUPPLY........................................................ Replace Dimming Control Power Supply........................................................... CARGO HOOK LIGHT DIMMING CONTROL PANEL................................ Replace Cargo Hook Light Dimming Control Panel. ........................................ CABIN DOME LIGHT LAMPS......................................................................... Replace Cabin Dome Light Lamps. .................................................................... CABIN DOME LIGHTS. .................................................................................... Replace Cabin Dome Lights................................................................................ PILOT’S AND COPILOT’S UTILITY LIGHT LAMPS. ................................. Replace Pilot’s and Copilot’s Utility Light Lamps. ........................................... PILOT’S AND COPILOT’S UTILITY LIGHTS............................................... Replace Pilot’s and Copilot’s Utility Lights....................................................... PORTABLE MAINTENANCE LIGHT LAMP. ................................................ Replace Portable Maintenance Light Lamp........................................................

Change 10

9-4-43-1 9-4-43-1 9-4-44-1 9-4-44-1 9-4-45-1 9-4-45-1 9-4-46-1 9-4-46-1 9-4-47-1 9-4-47-1 9-4-48-1 9-4-48-1 9-4-49-1 9-4-49-1 9-4-50-1 9-4-50-1 9-4-51-1 9-4-51-1 9-4-52-1 9-4-52-1 9-4-53-1 9-4-53-1 9-4-54-1 9-4-54-1 9-4-55-1 9-4-55-1 9-4-56-1 9-4-56-1 9-4-57-1 9-4-57-1 9-4-58-1 9-4-58-1 9-4-59-1 9-4-59-1 9-4-60-1 9-4-60-1 9-4-61-1 9-4-61-1 9-4-62-1 9-4-62-1 9-4-63-1 9-4-63-1 9-4-64-1 9-4-64-1

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Page 9-4-65 9-4-65.1 9-4-66 9-4-66.1 9-4-67 9-4-67.1 9-4-68 9-4-68.1 9-4-69 9-4-69.1 9-4-70 9-4-70.1 9-4-71 9-4-71.1 9-4-72 9-4-72.1 9-4-73 9-4-73.1 9-4-74 9-4-74.1 9-4-75 9-4-75.1 9-4-76 9-4-76.1 9-4-77 9-4-77.1 9-4-78 9-4-78.1 9-4-79 9-4-79.1 9-4-80 9-4-80.1 9-4-81 9-4-81.1 9-4-82 9-4-82.1 9-4-83 9-4-83.1 9-4-84

V5-viii

GLARE SHIELD LAMPS................................................................................... Replace Glare Shield Lamps. .............................................................................. GLARE SHIELD HARNESS.............................................................................. Replace Glare Shield Harness. ............................................................................ SECONDARY LIGHT ENCLOSURE FLOODLIGHT LAMPS. ..................... Replace Secondary Light Enclosure Floodlight Lamps. .................................... SECONDARY LIGHT ENCLOSURE INFORMATION PLATE LAMPS...... Replace Secondary Light Enclosure Information Plate Lamps.......................... SECONDARY LIGHT ENCLOSURE. .............................................................. Replace Secondary Light Enclosure.................................................................... MAIN ROTOR PYLON ELECTRO-LUMINESCENT FORMATION LIGHT. ................................................................................................................. Replace Main Rotor Pylon Electro-Luminescent Formation Light. .................. MAIN ROTOR PYLON INFRARED FORMATION LIGHT. ......................... Replace Main Rotor Pylon Infrared Formation Light. ....................................... TAIL CONE ELECTRO-LUMINESCENT FORMATION LIGHT. ................ Replace Tail Cone Electro-Luminescent Formation Light................................. TAIL CONE INFRARED FORMATION LIGHT. ............................................ Replace Tail Cone Infrared Formation Light. .................................................... STABILATOR ELECTRO-LUMINESCENT FORMATION LIGHTS............ Replace Stabilator Electro-Luminescent Formation Lights................................ STABILATOR INFRARED FORMATION LIGHTS. ...................................... Replace Stabilator Infrared Formation Lights..................................................... POSITION LIGHTS FLASHER UNIT. ............................................................. Replace Position Lights Flasher Unit.................................................................. HORIZONTAL STORES SUPPORT INCANDESCENT POSITION LIGHTS LAMPS AND LENSES ESSS ......................................................... Replace Horizontal Stores Support Incandescent Position Lights Lamps and Lenses. .................................................................................................................. DRAG BEAM SUPPORT FAIRING INCANDESCENT POSITION LIGHTS................................................................................................................ Replace Drag Beam Support Fairing Incandescent Position Lights. ................. DRAG BEAM SUPPORT FAIRING INFRARED POSITION LIGHTS. ........ Replace Drag Beam Support Fairing Infrared Position Lights. ......................... HORIZONTAL STORES SUPPORT INCANDESCENT POSITION LIGHTS ESSS ................................................................................................... Replace Horizontal Stores Support Incandescent Position Lights. .................... HORIZONTAL STORES SUPPORT INFRARED POSITION LIGHTS ESSS ................................................................................................................... Replace Horizontal Stores Support Infrared Position Lights. ............................ TAIL INCANDESCENT POSITION LIGHT LAMP AND LENS. ................. Replace Tail Incandescent Position Light Lamp and Lens................................ TAIL INCANDESCENT POSITION LIGHT. ................................................... Replace Tail Incandescent Position Light........................................................... TAIL INFRARED POSITION LIGHT...............................................................

Change 10

9-4-65-1 9-4-65-1 9-4-66-1 9-4-66-1 9-4-67-1 9-4-67-1 9-4-68-1 9-4-68-1 9-4-69-1 9-4-69-1 9-4-70-1 9-4-70-1 9-4-71-1 9-4-71-1 9-4-72-1 9-4-72-1 9-4-73-1 9-4-73-1 9-4-74-1 9-4-74-1 9-4-75-1 9-4-75-1 9-4-76-1 9-4-76-1 9-4-77-1 9-4-77-1 9-4-78-1 9-4-78-1 9-4-79-1 9-4-79-1 9-4-80-1 9-4-80-1 9-4-81-1 9-4-81-1 9-4-82-1 9-4-82-1 9-4-83-1 9-4-83-1 9-4-84-1

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TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 9-4-84.1 9-4-85 9-4-85.1 9-4-86 9-4-86.1 9-4-87 9-4-87.1 9-4-88 9-4-88.1 9-4-89 9-4-89.1 9-4-90 9-4-90.1 9-4-91 9-4-91.1 9-4-92 9-4-92.1 9-4-93 9-4-93.1 9-4-94 9-4-94.1 9-4-95 9-4-95.1 9-4-96 9-4-96.1 9-4-97 9-4-97.1 9-4-98 9-4-98.1 9-4-99 9-4-99.1 9-4-100 9-4-100.1 9-4-101 9-4-101.1 9-4-102 9-4-102.1 9-4-103 9-4-103.1 9-4-104 9-4-104.1

Replace Tail Infrared Position Light................................................................... ANTICOLLISION LIGHT RED AND WHITE SUBASSEMBLIES. .............. Replace Anticollision Light Red and White Subassemblies. ............................. ANTICOLLISION LIGHTS................................................................................ Replace Anticollision Lights. .............................................................................. ANTICOLLISION LIGHT BASE SUBASSEMBLIES. .................................... Replace Anticollision Light Base Subassemblies. .............................................. ANTICOLLISION LIGHTS POWER SUPPLY UNIT. .................................... Replace Anticollision Lights Power Supply Unit............................................... RETRACTABLE LANDING LIGHT LAMP. ................................................... Replace Retractable Landing Light Lamp. ......................................................... RETRACTABLE LANDING LIGHT................................................................. Replace Retractable Landing Light. .................................................................... CONTROLLABLE SEARCHLIGHT LAMP..................................................... Replace Controllable Searchlight Lamp.............................................................. CONTROLLABLE SEARCHLIGHT. ................................................................ Replace Controllable Searchlight. ....................................................................... CARGO HOOK LIGHTS.................................................................................... Replace Cargo Hook Lights. ............................................................................... CABIN INTERCOMMUNICATION SYSTEM FLOODLIGHT CONTROL PANEL LIGHT.................................................................................................... Replace Cabin Intercommunication System Floodlight Control Panel Light.... PASSENGER’S INTERCOMMUNICATION SYSTEM FLOODLIGHT CONTROL PANEL LIGHT................................................................................ Replace Passenger’s Intercommunication System Floodlight Control Panel Light. .................................................................................................................... ENGINE IGNITION SWITCH. .......................................................................... Replace Engine Ignition Switch. ......................................................................... ENGINE OVERSPEED RELAYS...................................................................... Replace Engine Overspeed Relays...................................................................... PIN FILTER ADAPTERS EMEP ................................................................... Replace Pin Filter Adapters................................................................................. INSTRUMENT PANEL PUSHBUTTON LAMPS............................................ Replace Instrument Panel Pushbutton Lamps..................................................... AUXILIARY SEARCHLIGHT CONTROL PANEL. ....................................... Replace Auxiliary Searchlight Control Panel. .................................................... AUXILIARY SEARCHLIGHT JUNCTION BOX. ........................................... Replace Auxiliary Searchlight Junction Box. ..................................................... AUXILIARY SEARCHLIGHT GIMBAL ASSEMBLY. .................................. Replace Auxiliary Searchlight Gimbal Assembly. ............................................. AUXILIARY SEARCHLIGHT ASSEMBLY. ................................................... Replace Auxiliary Searchlight Assembly............................................................ AUXILIARY SEARCHLIGHT INFRARED FILTER LENS. .......................... Adjust Auxiliary Searchlight Infrared Filter Lens..............................................

Change 10

9-4-84-1 9-4-85-1 9-4-85-1 9-4-86-1 9-4-86-1 9-4-87-1 9-4-87-1 9-4-88-1 9-4-88-1 9-4-89-1 9-4-89-1 9-4-90-1 9-4-90-1 9-4-91-1 9-4-91-1 9-4-92-1 9-4-92-1 9-4-93-1 9-4-93-1 9-4-94-1 9-4-94-1 9-4-95-1 9-4-95-1 9-4-96-1 9-4-96-1 9-4-97-1 9-4-97-1 9-4-98-1 9-4-98-2 9-4-99-1 9-4-99-1 9-4-100-1 9-4-100-1 9-4-101-1 9-4-101-1 9-4-102-1 9-4-102-1 9-4-103-1 9-4-103-1 9-4-104-1 9-4-104-1

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Page 9-4-105 9-4-105.1 9-4-106 9-4-106.1 9-4-107 9-4-107.1 9-4-108 9-4-108.1 9-4-109 9-4-109.1 9-4-110 9-4-110.1 9-4-111 9-4-111.1 9-4-112 9-4-112.1 Section 9-5 9-5-1 9-5-1.1 9-5-2 9-5-2.1 9-5-3 9-5-3.1 9-5-4 9-5-4.1 9-5-5 9-5-5.1 9-5-6 9-5-6.1 9-5-7 9-5-7.1 9-5-8 9-5-8.1

V5-x

SEALED LEAD-ACID BATTERY JUNCTION BOX RELAYS, K200 AND K201 702375 − SUBQ ............................................................................... Replace Sealed Lead-Acid Battery Junction Box Relays, K200 and K201. ..... SEALED LEAD-ACID BATTERY 702375 − SUBQ ....................................... Replace Sealed Lead-Acid Battery...................................................................... SEALED LEAD-ACID BATTERY JUNCTION BOX 702375 − SUBQ ......... Replace Sealed Lead-Acid Battery Junction Box............................................... NO. 7 RELAY PANEL. ...................................................................................... Replace No. 7 Relay Panel.................................................................................. DIMMING RESISTOR, R10. ............................................................................. Replace Dimming Resistor, R10. ........................................................................ AUXILIARY SEARCHLIGHT BRACKET INCANDESCENT POSITION LIGHT LAMPS AND LENSES. ........................................................................ Replace Auxiliary Searchlight Bracket Incandescent Position Light Lamps and Lenses............................................................................................................ AUXILIARY SEARCHLIGHT BRACKET INCANDESCENT POSITION LIGHT. ................................................................................................................. Replace Auxiliary Searchlight Bracket Incandescent Position Light................. AUXILIARY SEARCHLIGHT BRACKET INFRARED POSITION LIGHT. ................................................................................................................. Replace Auxiliary Searchlight Bracket Infrared Position Light......................... MAINTENANCE PROCEDURES (BENCH).................................................... LEFT RELAY PANEL LEFT PITOT HEAT TRANSFORMER, T1 (BENCH).............................................................................................................. Replace Left Relay Panel Left Pitot Heat Transformer, T1 (BENCH)............. LEFT RELAY PANEL SEARCHLIGHT RELAY, K41 (BENCH). ................ Replace Left Relay Panel Searchlight Relay, K41 (BENCH). .......................... LEFT RELAY PANEL SEARCHLIGHT RELAY, K51 (BENCH). ................ Replace Left Relay Panel Searchlight Relay, K51 (BENCH). .......................... LEFT RELAY PANEL SEARCHLIGHT RELAY, K52 (BENCH). ................ Replace Left Relay Panel Searchlight Relay, K52 (BENCH). .......................... LEFT RELAY PANEL NO. 1 ENGINE START RELAY, K45 (BENCH)..... Replace Left Relay Panel No. 1 Engine Start Relay, K45 (BENCH)............... LEFT RELAY PANEL INDICATOR LIGHTS DIMMING CONTROL RELAY, K40 (BENCH). ..................................................................................... Replace Left Relay Panel Indicator Lights Dimming Control Relay, K40 (BENCH).............................................................................................................. RIGHT RELAY PANEL CURRENT SENSOR RIGHT PITOT HEAT TRANSFORMER, T1 (BENCH). ....................................................................... Replace Right Relay Panel Current Sensor Right Pitot Heat Transformer, T1 (BENCH).............................................................................................................. RIGHT RELAY PANEL DC ESSENTIAL BUS FAIL RELAY, K20 (BENCH).............................................................................................................. Replace Right Relay Panel DC Essential Bus Fail Relay, K20 (BENCH).......

Change 10

9-4-105-1 9-4-105-1 9-4-106-1 9-4-106-1 9-4-107-1 9-4-107-1 9-4-108-1 9-4-108-1 9-4-109-1 9-4-109-1 9-4-110-1 9-4-110-1 9-4-111-1 9-4-111-1 9-4-112-1 9-4-112-1 9-5-1 9-5-1-1 9-5-1-1 9-5-2-1 9-5-2-1 9-5-3-1 9-5-3-1 9-5-4-1 9-5-4-1 9-5-5-1 9-5-5-1 9-5-6-1 9-5-6-1 9-5-7-1 9-5-7-1 9-5-8-1 9-5-8-1

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TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 9-5-9 9-5-9.1 9-5-10 9-5-10.1 9-5-11 9-5-11.1 9-5-12 9-5-12.1 9-5-13 9-5-13.1 9-5-14 9-5-14.1 9-5-15 9-5-15.1 9-5-16 9-5-16.1 9-5-17 9-5-17.1 9-5-18 9-5-18.1 9-5-19 9-5-19.1 9-5-20 9-5-20.1 9-5-21 9-5-21.1 9-5-22 9-5-22.1 9-5-23 9-5-23.1 9-5-24 9-5-24.1 9-5-25 9-5-25.1

RIGHT RELAY PANEL WINDSHIELD ANTI-ICE LOCKOUT RELAY, K21 (BENCH)...................................................................................................... Replace Right Relay Panel Windshield Anti-Ice Lockout Relay, K21 (BENCH).............................................................................................................. RIGHT RELAY PANEL APU SURGE RELAY, K22 (BENCH).................... Replace Right Relay Panel APU Surge Relay, K22 (BENCH)......................... RIGHT RELAY PANEL NO. 2 ENGINE START RELAY, K26 (BENCH).. Replace Right Relay Panel No. 2 Engine Start Relay, K26 (BENCH)............. RIGHT RELAY PANEL HYDRAULIC ACCUMULATOR RELAY, K32 (BENCH).............................................................................................................. Replace Right Relay Panel Hydraulic Accumulator Relay, K32 (BENCH). .... MISCELLANEOUS SWITCH PANEL PUSHBUTTON SWITCHES (BENCH).............................................................................................................. Replace Miscellaneous Switch Panel Pushbutton Switches (BENCH). ............ MISCELLANEOUS SWITCH PANEL TOGGLE SWITCH (BENCH). ......... Replace Miscellaneous Switch Panel Toggle Switch (BENCH). ...................... MISCELLANEOUS SWITCH PANEL ELECTRICAL CONNECTORS (BENCH).............................................................................................................. Replace Miscellaneous Switch Panel Electrical Connectors (BENCH). ........... MISCELLANEOUS SWITCH PANEL PRINTED WIRING BOARD (BENCH).............................................................................................................. Replace Miscellaneous Switch Panel Printed Wiring Board (BENCH)............ FUEL BOOST PUMP CONTROL PANEL TOGGLE SWITCHES (BENCH).............................................................................................................. Replace Fuel Boost Pump Control Panel Toggle Switches (BENCH).............. FUEL BOOST PUMP CONTROL PANEL INDICATOR LIGHTS (BENCH).............................................................................................................. Replace Fuel Boost Pump Control Panel Indicator Lights (BENCH)............... FUEL BOOST PUMP CONTROL PANEL INFORMATION PLATE LAMPS (BENCH). .............................................................................................. Replace Fuel Boost Pump Control Panel Information Plate Lamps (BENCH).............................................................................................................. FUEL BOOST PUMP CONTROL PANEL ELECTRICAL CONNECTOR (BENCH).............................................................................................................. Replace Fuel Boost Pump Control Panel Electrical Connector (BENCH). ...... BATTERY HARNESS (BENCH)....................................................................... Replace Battery Harness (BENCH). ................................................................... BATTERY ELECTRICAL RECEPTACLE, J2 (BENCH)................................ Replace Battery Electrical Receptacle, J2 (BENCH). ........................................ BATTERY TEMPERATURE SENSORS (BENCH)......................................... Replace Battery Temperature Sensors (BENCH). .............................................. BATTERY OVERTEMPERATURE SWITCHES (BENCH). .......................... Replace Battery Overtemperature Switches (BENCH). ..................................... BATTERY CLAMPING DIODE (BENCH). ..................................................... Replace Battery Clamping Diode (BENCH). .....................................................

Change 10

9-5-9-1 9-5-9-1 9-5-10-1 9-5-10-1 9-5-11-1 9-5-11-1 9-5-12-1 9-5-12-1 9-5-13-1 9-5-13-1 9-5-14-1 9-5-14-1 9-5-15-1 9-5-15-1 9-5-16-1 9-5-16-1 9-5-17-1 9-5-17-1 9-5-18-1 9-5-18-1 9-5-19-1 9-5-19-1 9-5-20-1 9-5-20-1 9-5-21-1 9-5-21-2 9-5-22-1 9-5-22-2 9-5-23-1 9-5-23-2 9-5-24-1 9-5-24-2 9-5-25-1 9-5-25-2

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Page 9-5-26 9-5-26.1 9-5-27 9-5-27.1 9-5-28 9-5-28.1 9-5-29 9-5-29.1 9-5-30 9-5-30.1 9-5-31 9-5-31.1 9-5-32 9-5-32.1 9-5-33 9-5-33.1 9-5-34 9-5-34.1 9-5-35 9-5-35.1 9-5-36 9-5-36.1 9-5-37 9-5-37.1

BATTERY CELLS (BENCH)............................................................................. Replace Battery Cells (BENCH). ........................................................................ BATTERY TEST VENT CAP (BENCH). ......................................................... Pressure Test Battery Vent Cap (BENCH)......................................................... PRESSURE TEST BATTERY CELL CASE (BENCH). .................................. Pressure Test Battery Cell Case (BENCH)......................................................... BATTERY CASE AND COVER (BENCH)...................................................... Repair/Clean Battery Case and Cover (BENCH). .............................................. PRESSURE TEST BATTERY CASE (BENCH)............................................... Pressure Test Battery Case (BENCH)................................................................. RECONDITION BATTERY (BENCH). ............................................................ Recondition Battery (BENCH)............................................................................ DEEP CYCLE BATTERY (BENCH). ............................................................... Deep Cycle Battery (BENCH). ........................................................................... NEW BATTERY (BENCH)................................................................................ Prepare New Battery for Service (BENCH). ...................................................... BATTERY LONG-TERM STORAGE (BENCH). ............................................ Battery Long-Term Storage (BENCH). .............................................................. BATTERY SHORT-TERM STORAGE (BENCH). .......................................... Battery Short-Term Storage (BENCH). .............................................................. CONTROLLABLE SEARCHLIGHT (BENCH)................................................ Repair Controllable Searchlight (BENCH). ........................................................ INDICATOR LIGHTS DIMMER BOX (BENCH). .......................................... Replace Indicator Lights Dimmer Box (BENCH)..............................................

9-5-26-1 9-5-26-2 9-5-27-1 9-5-27-1 9-5-28-1 9-5-28-2 9-5-29-1 9-5-29-2 9-5-30-1 9-5-30-2 9-5-31-1 9-5-31-2 9-5-32-1 9-5-32-2 9-5-33-1 9-5-33-1 9-5-34-1 9-5-34-2 9-5-35-1 9-5-35-1 9-5-36-1 9-5-36-2 9-5-37-1 9-5-37-1

CHAPTER 10

FUEL SYSTEM ...................................................................................................

10-1

Section 10-1 10-1-1 10-1-1.1 10-1-1.2 10-1-1.3 10-1-2 10-1-2.1 10-1-2.2 10-1-2.3 10-1-3 10-1-3.1 10-1-3.2 10-1-3.3 10-1-4 10-1-4.1 10-1-4.2 10-1-4.3

EQUIPMENT DESCRIPTION AND DATA ..................................................... FUEL LOW-LEVEL WARNING SYSTEM...................................................... System Description. ............................................................................................. Principles Of Operation. ...................................................................................... Component Description. ...................................................................................... SUBMERGED FUEL BOOST PUMP SYSTEM. ............................................. System Description. ............................................................................................. Principles Of Operation. ...................................................................................... Component Description. ...................................................................................... FUEL PRIME BOOST SYSTEM. ...................................................................... System Description. ............................................................................................. Principles Of Operation. ...................................................................................... Component Description. ...................................................................................... PRESSURE REFUEL/DEFUEL SYSTEM. ....................................................... System Description. ............................................................................................. Principles Of Operation. ...................................................................................... Component Description. ......................................................................................

10-1-1 10-1-1-1 10-1-1-1 10-1-1-1 10-1-1-1 10-1-2-1 10-1-2-1 10-1-2-1 10-1-2-1 10-1-3-1 10-1-3-1 10-1-3-1 10-1-3-1 10-1-4-1 10-1-4-1 10-1-4-1 10-1-4-1

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Change 10

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 10-1-5 10-1-5.1 10-1-5.2 10-1-5.3

FUEL QUANTITY SYSTEM. ............................................................................ System Description. ............................................................................................. Principles Of Operation. ...................................................................................... Component Description. ......................................................................................

10-1-5-1 10-1-5-1 10-1-5-1 10-1-5-1

Section 10-2 10-2-1 10-2-2 10-2-3 10-2-4 10-2-5 10-2-6 10-2-7 10-2-7.1 10-2-7.2 10-2-7.3 10-2-7.4 10-2-7.5 10-2-7.6 10-2-7.7

Troubleshooting.................................................................................................... FUEL LOW-LEVEL WARNING SYSTEM...................................................... SUBMERGED FUEL BOOST PUMP SYSTEM. ............................................. FUEL PRIME BOOST SYSTEM. ...................................................................... PRESSURE REFUEL/DEFUEL SYSTEM. ....................................................... FUEL QUANTITY SYSTEM (USING TEST SET PSD-40). .......................... FUEL QUANTITY SYSTEM (USING TEST SET PSD-60). .......................... ENGINE FEED FUEL LINES............................................................................ No. 1 Engine Setup.............................................................................................. No. 1 Engine, Direct Feed, Restriction and Leak Test. ..................................... No. 1 Engine, Cross Feed, Restriction and Leak Test. ...................................... No. 2 Engine Setup.............................................................................................. No. 2 Engine, Direct Feed, Restriction and Leak Test. ..................................... No. 2 Engine, Cross Feed, Restriction and Leak Test. ...................................... Engine Fuel Feed Lines Pressure Test................................................................

10-2-1 10-2-1-1 10-2-2-1 10-2-3-1 10-2-4-1 10-2-5-1 10-2-6-1 10-2-7-1 10-2-7-2 10-2-7-2 10-2-7-3 10-2-7-4 10-2-7-4 10-2-7-5 10-2-7-6

Section 10-3 10-3-1 10-3-1.1 10-3-2 10-3-2.1 10-3-3 10-3-3.1 10-3-3.2 10-3-3.3 10-3-3.4

ON AIRCRAFT INSPECTIONS ........................................................................ MAIN FUEL CELLS PRESSURE TEST (PRIMARY METHOD).................. Main Fuel Cells Pressure Test (Primary Method).............................................. MAIN FUEL CELLS PRESSURE TEST (ALTERNATE METHOD)............. Main Fuel Cells Pressure Test (Alternate Method)............................................ MAIN FUEL SYSTEM INSPECTIONS. ........................................................... Crossfeed Breakaway Valve................................................................................ Breakaway Tee Valve.......................................................................................... Engine Compartment Breakaway Valve. ............................................................ Main Fuel Cell Ballistic Ring. ............................................................................

10-3-1 10-3-1-1 10-3-1-1 10-3-2-1 10-3-2-1 10-3-3-1 10-3-3-1 10-3-3-1 10-3-3-1 10-3-3-2

Section 10-4 10-4-1 10-4-1.1 10-4-2 10-4-2.1 10-4-3 10-4-3.1 10-4-4 10-4-4.1 10-4-5 10-4-5.1 10-4-6

MAINTENANCE PROCEDURES ..................................................................... FUEL SYSTEM PRIMING................................................................................. Fuel System Priming............................................................................................ MAIN FUEL CELL............................................................................................. Replace Main Fuel Cell. ...................................................................................... MAIN FUEL CELL PLATE AND ATTACHED COMPONENTS.................. Replace Main Fuel Cell Plate and Attached Components. ................................ HIGH LEVEL SHUTOFF VALVES.................................................................. Replace High Level Shutoff Valves.................................................................... PRESSURE REFUEL/DEFUEL VALVE. ......................................................... Replace Pressure Refuel/Defuel Valve. .............................................................. SUMP DRAIN VALVE. .....................................................................................

10-4-1 10-4-1-1 10-4-1-1 10-4-2-1 10-4-2-2 10-4-3-1 10-4-3-2 10-4-4-1 10-4-4-1 10-4-5-1 10-4-5-1 10-4-6-1

Change 10

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TABLE OF CONTENTS (Cont)

Page 10-4-6.1 10-4-7 10-4-7.1 10-4-8 10-4-8.1 10-4-9 10-4-9.1 10-4-10 10-4-10.1 10-4-11 10-4-11.1 10-4-12 10-4-12.1 10-4-13 10-4-13.1 10-4-14 10-4-14.1 10-4-15 10-4-15.1 10-4-16 10-4-16.1 10-4-17 10-4-17.1 10-4-18 10-4-18.1 10-4-19 10-4-19.1 10-4-20 10-4-20.1 10-4-21 10-4-21.1 10-4-22 10-4-22.1 10-4-23 10-4-23.1 10-4-24 10-4-24.1 10-4-25 10-4-25.1 10-4-26 10-4-26.1 10-4-27 10-4-27.1 10-4-28

V5-xiv

Replace Sump Drain Valve. ................................................................................ PRIME/BOOST PUMP CHECK VALVE.......................................................... Replace Prime/Boost Pump Check Valve........................................................... MAIN FUEL LINE CHECK VALVE................................................................ Replace Main Fuel Line Check Valve................................................................ LOW LEVEL SHUTOFF VALVE. .................................................................... Replace Low Level Shutoff Valve. ..................................................................... PRESSURE REFUELING INTERCONNECT TUBE. ...................................... Replace Pressure Refueling Interconnect Tube. ................................................. EXTENDED RANGE INTERCONNECT HOSE.............................................. Replace Extended Range Interconnect Hose. ..................................................... FUEL BOOST PUMP. ........................................................................................ Replace Fuel Boost Pump. .................................................................................. MAIN FUEL CELL CHECK VALVE. .............................................................. Replace Main Fuel Cell Check Valve................................................................. FUEL PRESSURE SWITCH. ............................................................................. Replace Fuel Pressure Switch. ............................................................................ MAIN ENGINE PRIME FUEL SHUTOFF VALVE. ....................................... Replace Main Engine Prime Fuel Shutoff Valve. .............................................. SELF-SEALING BREAKAWAY VENT VALVE. ........................................... Replace Self-Sealing Breakaway Vent Valve..................................................... MAIN FUEL SYSTEM VENT VALVE. ........................................................... Replace Main Fuel System Vent Valve.............................................................. MAIN FUEL BREAKAWAY VALVE.............................................................. Replace Main Fuel Breakaway Valve................................................................. EXTENDED RANGE BREAKAWAY VALVE. .............................................. Replace Extended Range Breakaway Valve. ...................................................... PRIME/BOOST PUMP. ...................................................................................... Replace Prime/Boost Pump. ................................................................................ PRIME/BOOST PUMP FUEL OUTLET VALVE. ........................................... Replace Prime/Boost Pump Fuel Outlet Valve................................................... PRIME/BOOST PUMP FUEL BREAKAWAY VALVE.................................. Replace Prime/Boost Pump Fuel Breakaway Valve........................................... MAIN FUEL SYSTEM CHECK VALVE. ........................................................ Replace Main Fuel System Check Valve. .......................................................... ENGINE COMPARTMENT BREAKAWAY VALVE. .................................... Replace Engine Compartment Breakaway Valve. .............................................. FUEL SELECTOR VALVE................................................................................ Replace Fuel Selector Valve. .............................................................................. CROSSFEED BREAKAWAY VALVE. ............................................................ Replace Crossfeed Breakaway Valve.................................................................. BREAKAWAY TEE VALVE............................................................................. Replace Breakaway Tee Valve............................................................................ BULKHEAD BREAKAWAY VALVE..............................................................

Change 10

10-4-6-1 10-4-7-1 10-4-7-1 10-4-8-1 10-4-8-1 10-4-9-1 10-4-9-1 10-4-10-1 10-4-10-1 10-4-11-1 10-4-11-1 10-4-12-1 10-4-12-2 10-4-13-1 10-4-13-1 10-4-14-1 10-4-14-1 10-4-15-1 10-4-15-2 10-4-16-1 10-4-16-1 10-4-17-1 10-4-17-1 10-4-18-1 10-4-18-1 10-4-19-1 10-4-19-1 10-4-20-1 10-4-20-1 10-4-21-1 10-4-21-1 10-4-22-1 10-4-22-1 10-4-23-1 10-4-23-1 10-4-24-1 10-4-24-1 10-4-25-1 10-4-25-1 10-4-26-1 10-4-26-1 10-4-27-1 10-4-27-1 10-4-28-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 10-4-28.1 10-4-29 10-4-29.1 10-4-30 10-4-30.1 10-4-31 10-4-31.1 10-4-32 10-4-32.1 10-4-33 10-4-33.1 10-4-34 10-4-34.1 10-4-35 10-4-35.1 10-4-36 10-4-36.1 10-4-37 10-4-37.1 10-4-38 10-4-38.1 10-4-38.2 10-4-39 10-4-39.1 10-4-39.2 10-4-40 10-4-40.1 10-4-40.2 10-4-41 10-4-41.1 10-4-42 10-4-42.1 10-4-43 10-4-43.1 10-4-44 10-4-44.1

Replace Bulkhead Breakaway Valve. ................................................................. FUEL SYSTEM DRAIN HOSE AND TUBES. ................................................ Replace Fuel System Drain Hose and Tubes. .................................................... FUEL SYSTEM VENT LINES. ......................................................................... Replace Fuel System Vent Lines. ....................................................................... PRESSURE REFUELING RECEPTACLE. ....................................................... Replace Pressure Refueling Receptacle. ............................................................. REFUEL ADAPTER AND NIPPLE. ................................................................. Replace Refuel Adapter and Nipple.................................................................... FUEL QUANTITY PROBE................................................................................ Replace Fuel Quantity Probe............................................................................... FUEL CELL WIRING HARNESS. .................................................................... Replace Fuel Cell Wiring Harness...................................................................... LOW LEVEL WARNING CONDITIONER...................................................... Replace Low Level Warning Conditioner. ......................................................... FUEL QUANTITY SIGNAL CONDITIONER. ................................................ Replace Fuel Quantity Signal Conditioner. ........................................................ FIXED BLEED-AIR LINES AND DISCONNECTS. ....................................... Replace Fixed Bleed-Air Lines and Disconnects. .............................................. FIXED FUEL LINES AND DISCONNECTS. .................................................. Replace Fixed Fuel Lines and Tension Clips. .................................................... Replace Fitting Assembly and Bulkhead Connectors......................................... FUEL FEED SYSTEM........................................................................................ Purge Fuel Feed System. ..................................................................................... Test Fuel Feed System......................................................................................... PURGE MAIN FUEL CELL. ............................................................................. Purge Main Fuel Cell (Primary Method)............................................................ Purge Main Fuel Cell (Alternate Method).......................................................... UPPER DECK MAIN FUEL HOSES. ............................................................... Replace Upper Deck Main Fuel Hoses............................................................... LOWER APU FUEL LINE................................................................................. Replace Lower APU Fuel Line. .......................................................................... PRIME FUEL LINES.......................................................................................... Replace Prime Fuel Lines.................................................................................... LOWER MAIN FUEL LINES............................................................................ Replace Lower Main Fuel Lines. ........................................................................

10-4-28-1 10-4-29-1 10-4-29-1 10-4-30-1 10-4-30-1 10-4-31-1 10-4-31-1 10-4-32-1 10-4-32-1 10-4-33-1 10-4-33-1 10-4-34-1 10-4-34-1 10-4-35-1 10-4-35-1 10-4-36-1 10-4-36-1 10-4-37-1 10-4-37-1 10-4-38-1 10-4-38-1 10-4-38-5 10-4-39-1 10-4-39-2 10-4-39-6 10-4-40-1 10-4-40-1 10-4-40-2 10-4-41-1 10-4-41-1 10-4-42-1 10-4-42-1 10-4-43-1 10-4-43-1 10-4-44-1 10-4-44-2

Section 10-5 10-5-1 10-5-1.1

MAINTENANCE PROCEDURES (BENCH).................................................... MAIN FUEL CELL BALLISTIC RING (BENCH). ......................................... Replace Main Fuel Cell Ballistic Ring (BENCH)..............................................

10-5-1 10-5-1-1 10-5-1-1

Change 10

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This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

VOLUME

6

TABLE OF CONTENTS Page CHAPTER 11

FLIGHT CONTROLS ........................................................................................

11-1

Section 11-1 11-1-1 11-1-1.1 11-1-1.2 11-1-1.3

EQUIPMENT DESCRIPTION AND DATA ..................................................... FLIGHT CONTROL SYSTEM DESCRIPTION AND DATA......................... System Description. ............................................................................................. Principles Of Operation. ...................................................................................... Subsystem Description.........................................................................................

11-1-1 11-1-1-1 11-1-1-1 11-1-1-1 11-1-1-1

Section 11-2 11-2-1 11-2-2 11-2-3 11-2-3.1 11-2-3.2 11-2-3.3 11-2-4 11-2-5 11-2-6 11-2-7

TROUBLESHOOTING ....................................................................................... CYCLIC STICK ASSEMBLY............................................................................ COLLECTIVE STICK ASSEMBLY.................................................................. MECHANICAL FLIGHT CONTROLS. ............................................................ Binding. ................................................................................................................ In-Flight Attitude Oscillations. ............................................................................ Flight Control Noise Checkout............................................................................ ROLL SAS ASSEMBLY (BENCH)................................................................... YAW BOOST ASSEMBLY (BENCH).............................................................. PITCH TRIM ASSEMBLY (BENCH). .............................................................. PILOT-ASSIST MODULE (BENCH). ...............................................................

11-2-1 11-2-1-1 11-2-2-1 11-2-3-1 11-2-3-2 11-2-3-4 11-2-3-5 11-2-4-1 11-2-5-1 11-2-6-1 11-2-7-1

Section 11-3 11-3-1 11-3-1.1 11-3-1.2 11-3-2 11-3-2.1 11-3-3 11-3-3.1 11-3-4 11-3-4.1 11-3-4.2 11-3-5 11-3-5.1 11-3-5.2 11-3-5.3 11-3-6 11-3-6.1 11-3-7

ON AIRCRAFT INSPECTIONS ....................................................................... SELF-RETAINING BOLT INSPECTION. ........................................................ Inspect Self-Retaining Bolts. ............................................................................... Special Self-Retaining Bolt FSCAP Inspection.................................................. BEARING FRICTION WEAR INSPECTION................................................... Inspect Bearing Friction Wear............................................................................. CONTROL ROD CONNECTION INSPECTION. ............................................ Inspect Control Rod Connection. ........................................................................ CYCLIC STICK INSPECTIONS........................................................................ Inspect Cyclic Stick Bearings.............................................................................. Inspect Cyclic Stick Boot. ................................................................................... COLLECTIVE STICK INSPECTIONS.............................................................. Inspect Copilot’s Collective Stick Grip Coil Cord............................................. Inspect Collective Stick Bearings........................................................................ Inspect Collective Stick Boot. ............................................................................. YAW BOOST SERVO INSPECTION. .............................................................. Inspect Yaw Boost Servo. ................................................................................... COLLECTIVE BOOST ASSEMBLY INSPECTION........................................

11-3-1 11-3-1-1 11-3-1-1 11-3-1-2 11-3-2-1 11-3-2-1 11-3-3-1 11-3-3-1 11-3-4-1 11-3-4-1 11-3-4-1 11-3-5-1 11-3-5-1 11-3-5-2 11-3-5-2 11-3-6-1 11-3-6-1 11-3-7-1

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TABLE OF CONTENTS (Cont)

Page 11-3-7.1 11-3-8 11-3-8.1 11-3-9 11-3-9.1 11-3-10 11-3-10.1 11-3-11 11-3-11.1 11-3-12 11-3-12.1 11-3-12.2 11-3-13 11-3-13.1 11-3-14 11-3-14.1 11-3-14.2 11-3-15 11-3-15.1 11-3-16 11-3-16.1 11-3-17 11-3-17.1 11-3-18 11-3-18.1 11-3-19 11-3-19.1 11-3-20 11-3-20.1 11-3-20.2 11-3-21 11-3-21.1 11-3-21.2 11-3-22 11-3-22.1 11-3-22.2 11-3-23 11-3-23.1 11-3-24 11-3-24.1 11-3-25 11-3-25.1 11-3-25.2 11-3-25.3 V6-ii

Inspect Collective Boost Assembly..................................................................... MIXER INSPECTION......................................................................................... Mixer Mounting Bolt Torque Check................................................................... TORQUE SHAFT INSPECTION. ...................................................................... Torque Shaft Torque Check. ............................................................................... YAW TORQUE SHAFT LOWER SUPPORT INSPECTION.......................... Inspect Yaw Torque Shaft Lower Support. ........................................................ YAW LEVER AND SUPPORT (STA 301.0) INSPECTION........................... Inspect Yaw Lever and Support (STA 301.0). ................................................... SWASHPLATE LINK INSPECTIONS.............................................................. Swashplate Link FSCAP Inspection. .................................................................. Swashplate Link Bearing Inspection. .................................................................. MAIN ROTOR CONTROL SELF-RETAINING BOLT INSPECTION. ......... Main Rotor Control Self-Retaining Bolt FSCAP Inspection. ............................ WALKING BEAM INSPECTIONS. .................................................................. Walking Beam FSCAP Inspection. ..................................................................... Walking Beam Bearing Inspection...................................................................... FORWARD BELLCRANK SUPPORT INSPECTION. .................................... Forward Bellcrank Support FSCAP Inspection. ................................................. RIGHT AND LEFT TIE ROD INSPECTION. .................................................. Right and Left Tie Rod FSCAP Inspection........................................................ MAIN ROTOR CONTROL ROD INSPECTION.............................................. Main Rotor Control Rod FSCAP Inspection. ..................................................... AFT BELLCRANK SUPPORT INSPECTION.................................................. Aft Bellcrank Support FSCAP Inspection. ......................................................... AFT TIE ROD AND SUPPORT FITTING INSPECTION............................... Aft Tie Rod and Support Fitting FSCAP Inspection. ........................................ AFT BELLCRANK INSPECTIONS. ................................................................. Aft Bellcrank FSCAP Inspection. ....................................................................... Aft Bellcrank Inspection...................................................................................... FORWARD BELLCRANK INSPECTIONS...................................................... Forward Bellcrank FSCAP Inspection. ............................................................... Forward Bellcrank Bearing Inspection................................................................ LATERAL BELLCRANK INSPECTIONS........................................................ Lateral Bellcrank FSCAP Inspection. ................................................................. Lateral Bellcrank Bearing Inspection.................................................................. AFT LONGITUDINAL BELLCRANK SUPPORT ARM INSPECTION........ Aft Longitudinal Bellcrank Support Arm FSCAP Inspection............................ FORWARD, AFT, AND LATERAL FLIGHT CONTROL CHANNEL INSPECTION....................................................................................................... Radial Play Inspection. ........................................................................................ FLIGHT CONTROL CABLE INSPECTIONS. ................................................. Cable Inspection................................................................................................... Tail Rotor Pylon Cable Conduit Inspection........................................................ Cable Pulley Bracket Inspection. ........................................................................ Change 10

11-3-7-1 11-3-8-1 11-3-8-1 11-3-9-1 11-3-9-1 11-3-10-1 11-3-10-1 11-3-11-1 11-3-11-1 11-3-12-1 11-3-12-1 11-3-12-3 11-3-13-1 11-3-13-1 11-3-14-1 11-3-14-1 11-3-14-2 11-3-15-1 11-3-15-1 11-3-16-1 11-3-16-1 11-3-17-1 11-3-17-1 11-3-18-1 11-3-18-1 11-3-19-1 11-3-19-1 11-3-20-1 11-3-20-1 11-3-20-2 11-3-21-1 11-3-21-1 11-3-21-2 11-3-22-1 11-3-22-1 11-3-22-2 11-3-23-1 11-3-23-1 11-3-24-1 11-3-24-1 11-3-25-1 11-3-25-1 11-3-25-3 11-3-25-3

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 11-3-26 11-3-26.1 11-3-27 11-3-27.1 11-3-28 11-3-28.1

TAIL ROTOR QUADRANT INSPECTION...................................................... Tail Rotor Quadrant Function Check.................................................................. TAIL ROTOR QUADRANT SPRING CYLINDER SUPPORT TERMINAL ASSEMBLY INSPECTION. ............................................................................... Inspect Tail Rotor Quadrant Spring Cylinder Support Terminal Assembly. .... SAS ACTUATOR INSPECTION. ...................................................................... Inspect SAS Actuator Nut. ..................................................................................

11-3-27-1 11-3-27-1 11-3-28-1 11-3-28-1

Section 11-4 11-4-1 11-4-1.1 11-4-1.2 11-4-2 11-4-2.1 11-4-2.2 11-4-3 11-4-3.1 11-4-4 11-4-4.1 11-4-5 11-4-5.1 11-4-6 11-4-6.1 11-4-7 11-4-7.1 11-4-8 11-4-8.1 11-4-9 11-4-9.1 11-4-10 11-4-10.1 11-4-11 11-4-11.1 11-4-12 11-4-12.1 11-4-13 11-4-13.1 11-4-14 11-4-14.1 11-4-15 11-4-15.1 11-4-16 11-4-16.1 11-4-17 11-4-17.1

MAINTENANCE PROCEDURES ..................................................................... CONTROL RODS. .............................................................................................. Control Rod Installation. ..................................................................................... Control Rod Corrosion Protection....................................................................... FLIGHT CONTROL SYSTEM GENERAL RIGGING INSTRUCTIONS. .... Introduction. ......................................................................................................... Flight Control Rigging Pin Installation............................................................... MAIN ROTOR SYSTEM COMPLETE RIG..................................................... Main Rotor System Complete Rig. ..................................................................... MAIN ROTOR SYSTEM RIG CHECK. ........................................................... Perform Main Rotor System Rig Check. ............................................................ TAIL ROTOR SYSTEM COMPLETE RIG. ..................................................... Perform Tail Rotor System Complete Rig.......................................................... TAIL ROTOR SYSTEM RIG CHECK.............................................................. Perform Tail Rotor System Rig Check. .............................................................. YAW CONTROL PEDAL BOOTS.................................................................... Replace Yaw Control Pedal Boots...................................................................... YAW CONTROL PEDAL. ................................................................................. Replace Yaw Control Pedal................................................................................. YAW CONTROL PEDAL TRIM SWITCH. ..................................................... Replace Yaw Control Pedal Trim Switch........................................................... YAW CONTROL PEDAL SUPPORT ASSEMBLY......................................... Replace Yaw Control Pedal Support Assembly. ................................................ YAW CONTROL PEDAL ADJUSTER............................................................. Replace Yaw Control Pedal Adjuster. ................................................................ YAW CONTROL PEDAL ADJUSTER CABLE AND HANDLE................... Replace Yaw Control Pedal Adjuster Cable and Handle................................... PILOT’S YAW PEDALS AND ADJUSTER CONTROL RODS. ................... Replace Pilot’s Yaw Pedals and Adjuster Control Rods. .................................. COPILOT’S YAW PEDALS AND ADJUSTER CONTROL RODS............... Replace Copilot’s Yaw Pedals and Adjuster Control Rods. .............................. CYCLIC STICK BOOT. ..................................................................................... Replace Cyclic Stick Boot................................................................................... CYCLIC STICK. ................................................................................................. Replace Cyclic Stick............................................................................................ CYCLIC STICK GRIP. ....................................................................................... Replace Cyclic Stick Grip. ..................................................................................

11-4-1 11-4-1-1 11-4-1-1 11-4-1-2 11-4-2-1 11-4-2-1 11-4-2-8 11-4-3-1 11-4-3-2 11-4-4-1 11-4-4-1 11-4-5-1 11-4-5-2 11-4-6-1 11-4-6-1 11-4-7-1 11-4-7-1 11-4-8-1 11-4-8-1 11-4-9-1 11-4-9-1 11-4-10-1 11-4-10-1 11-4-11-1 11-4-11-1 11-4-12-1 11-4-12-1 11-4-13-1 11-4-13-1 11-4-14-1 11-4-14-1 11-4-15-1 11-4-15-1 11-4-16-1 11-4-16-1 11-4-17-1 11-4-17-1

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11-3-26-1 11-3-26-1

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TABLE OF CONTENTS (Cont)

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CYCLIC STICK SWITCHES. ............................................................................ Replace Cyclic Stick PNL LTS, CARGO REL, TRIM REL, and GA Switches................................................................................................................ CYCLIC STICK TRIM SWITCH....................................................................... Replace Cyclic STICK TRIM Switch................................................................. CYCLIC STICK ICS/RADIO SWITCH............................................................. Replace Cyclic Stick ICS/RADIO Switch. ......................................................... CYCLIC STICK WIRING. ................................................................................. Replace Cyclic Stick Wiring. .............................................................................. CYCLIC STICK SOCKET.................................................................................. Replace Cyclic Stick Socket................................................................................ CYCLIC STICK BEARINGS. ............................................................................ Replace Cyclic Stick Bearings. ........................................................................... CYCLIC STICK TUBE....................................................................................... Replace Cyclic Stick Tube. ................................................................................. CYCLIC STICK YOKE AND HOUSING......................................................... Replace Cyclic Stick Yoke and Housing............................................................ COLLECTIVE STICK BOOT AND COVER. .................................................. Replace Collective Stick Boot and Cover........................................................... PILOT’S COLLECTIVE STICK. ....................................................................... Replace Pilot’s Collective Stick. ......................................................................... COPILOT’S COLLECTIVE STICK................................................................... Replace Copilot’s Collective Stick...................................................................... Replace Copilot’s Collective Stick Tube Assembly........................................... PILOT’S COLLECTIVE STICK COLLET BLOCKS....................................... Replace Pilot’s Collective Stick Collet Blocks................................................... PILOT’S AND COPILOT’S COLLECTIVE STICK SUPPORT...................... Replace Pilot’s and Copilot’s Collective Stick Support..................................... COLLECTIVE STICK GRIP ASSEMBLY. ...................................................... Replace Collective Stick Grip Assembly............................................................ COLLECTIVE STICK GRIP LIGHTED PANEL AND LAMPS..................... Replace Collective Stick Grip Lighted Panel and Lamps.................................. COLLECTIVE STICK SRCH LT AND SVO OFF SWITCHES. .................... Replace Collective Stick SRCH LT and SVO OFF Switches. .......................... COLLECTIVE STICK LDG LT AND EMERG HOOK REL SWITCHES. ... Replace Collective Stick LDG LT and EMERG HOOK REL Switches. ......... COLLECTIVE STICK ENG RPM SWITCH..................................................... Replace Collective Stick ENG RPM Switch. ..................................................... COLLECTIVE STICK SRCH LT SWITCH...................................................... Replace Collective Stick SRCH LT Switch. ...................................................... COPILOT’S COLLECTIVE STICK GRIP COIL CORD. ................................ Replace Copilot’s Collective Stick Grip Coil Cord. .......................................... PILOT’S COLLECTIVE STICK GRIP WIRE. ................................................. Replace Pilot’s Collective Stick Grip Wire. ....................................................... PILOT’S COLLECTIVE STICK FRICTION LOCK. ....................................... Change 10

11-4-18-1 11-4-18-1 11-4-19-1 11-4-19-1 11-4-20-1 11-4-20-1 11-4-21-1 11-4-21-1 11-4-22-1 11-4-22-1 11-4-23-1 11-4-23-1 11-4-24-1 11-4-24-1 11-4-25-1 11-4-25-1 11-4-26-1 11-4-26-1 11-4-27-1 11-4-27-1 11-4-28-1 11-4-28-1 11-4-28-3 11-4-29-1 11-4-29-1 11-4-30-1 11-4-30-1 11-4-31-1 11-4-31-1 11-4-32-1 11-4-32-1 11-4-33-1 11-4-33-1 11-4-34-1 11-4-34-1 11-4-35-1 11-4-35-1 11-4-36-1 11-4-36-1 11-4-37-1 11-4-37-1 11-4-38-1 11-4-38-1 11-4-39-1

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Replace Pilot’s Collective Stick Friction Lock................................................... COLLECTIVE STICK SOCKET........................................................................ Replace Collective Stick Socket.......................................................................... COLLECTIVE STICK BEARINGS. .................................................................. Replace Collective Stick Bearings. ..................................................................... PILOT’S DIRECTIONAL AND CYCLIC CONTROL RODS......................... Replace Pilot’s Directional and Cyclic Control Rods. ....................................... COPILOT’S DIRECTIONAL AND CYCLIC CONTROL RODS. .................. Replace Copilot’s Directional and Cyclic Control Rods.................................... PILOT’S COLLECTIVE CONTROL RODS. .................................................... Replace Pilot’s Collective Control Rods............................................................. COPILOT’S COLLECTIVE CONTROL ROD.................................................. Replace Copilot’s Collective Control Rod.......................................................... CABIN CONTROL RODS. ................................................................................ Replace Cabin Control Rods. .............................................................................. COCKPIT BELLCRANKS AND LEVERS. ...................................................... Replace Cockpit Bellcranks and Levers. ............................................................ CABIN BELLCRANKS AND BELLCRANK SUPPORT................................ Replace Cabin Bellcranks and Bellcrank Support.............................................. LOWER CABIN BELLCRANK SUPPORTS.................................................... Replace Lower Cabin Bellcrank Supports. ......................................................... MIDSECTION BELLCRANKS AND SHAFT.................................................. Replace Midsection Bellcranks and Shaft........................................................... UPPER CABIN LINKS AND LEVERS. ........................................................... Replace Pitch Link............................................................................................... Replace Pitch Lever. ............................................................................................ Replace Lateral Link............................................................................................ Replace Lateral Lever.......................................................................................... YAW TRIM SERVO........................................................................................... Replace Yaw Trim Servo. ................................................................................... ROLL TRIM SERVO.......................................................................................... Replace Roll Trim Servo. .................................................................................... TRIM SERVO CONTROL ROD........................................................................ Replace Trim Servo Control Rod........................................................................ COLLECTIVE TORQUE SHAFT AND LEVERS. .......................................... Replace Collective Torque Shaft and Levers. .................................................... PITCH TORQUE SHAFT AND LEVERS......................................................... Replace Pitch Torque Shaft and Levers.............................................................. LATERAL TORQUE SHAFT AND LEVERS.................................................. Replace Lateral Torque Shaft and Levers........................................................... YAW TORQUE SHAFT AND LEVERS........................................................... Replace Yaw Torque Shaft and Levers. ............................................................. TORQUE SHAFT UPPER TAPERED PINS..................................................... Replace Torque Shaft Upper Tapered Pins.........................................................

11-4-39-1 11-4-40-1 11-4-40-1 11-4-41-1 11-4-41-1 11-4-42-1 11-4-42-1 11-4-43-1 11-4-43-1 11-4-44-1 11-4-44-1 11-4-45-1 11-4-45-1 11-4-46-1 11-4-46-1 11-4-47-1 11-4-47-1 11-4-48-1 11-4-48-1 11-4-49-1 11-4-49-1 11-4-50-1 11-4-50-2 11-4-51-1 11-4-51-1 11-4-51-4 11-4-51-5 11-4-51-6 11-4-52-1 11-4-52-1 11-4-53-1 11-4-53-1 11-4-54-1 11-4-54-1 11-4-55-1 11-4-55-2 11-4-56-1 11-4-56-2 11-4-57-1 11-4-57-2 11-4-58-1 11-4-58-2 11-4-59-1 11-4-59-1

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BALANCE SPRINGS. ........................................................................................ Replace Balance Springs. .................................................................................... CYCLIC STICK BALANCE SPRING ADJUSTMENT. .................................. Adjust Cyclic Stick Balance Spring.................................................................... COLLECTIVE STICK BALANCE SPRING ADJUSTMENT. ........................ Adjust Collective Stick Balance Spring.............................................................. COLLECTIVE INPUT CONTROL ROD. ......................................................... Replace Collective Input Control Rod. ............................................................... PITCH/TRIM INPUT CONTROL ROD. ........................................................... Replace Pitch/Trim Input Control Rod. .............................................................. LATERAL INPUT CONTROL ROD................................................................. Replace Lateral Input Control Rod. .................................................................... YAW BOOST SERVO INPUT CONTROL ROD............................................. Replace Yaw Boost Servo Input Control Rod.................................................... COLLECTIVE BOOST ASSEMBLY. ............................................................... Replace Collective Boost Assembly. .................................................................. PITCH/TRIM ASSEMBLY................................................................................. Replace Pitch/Trim Assembly. ............................................................................ ROLL ACTUATOR. ........................................................................................... Replace Roll Actuator.......................................................................................... YAW BOOST SERVO........................................................................................ Replace Yaw Boost Servo. .................................................................................. COLLECTIVE SAS ASSEMBLY/YAW BOOST SERVO PRESSURE SWITCH AND THERMAL RELIEF VALVE. ................................................. Replace Collective SAS Assembly/Yaw Boost Servo Pressure Switch and Thermal Relief Valve........................................................................................... SAS ACTUATOR BLEED SCREW AND PACKING. .................................... Replace SAS Actuator Bleed Screw and Packing.............................................. COLLECTIVE SERVO TO MIXER CONTROL ROD. ................................... Replace Collective Servo to Mixer Control Rod................................................ PITCH/TRIM ASSEMBLY TO MIXER CONTROL LINK............................. Replace Pitch/Trim Assembly to Mixer Control Link. ...................................... ROLL TRIM ASSEMBLY TO MIXER CONTROL ROD. ............................ Replace Roll Trim Assembly to Mixer Control Rod. ........................................ YAW BOOST SERVO TO MIXER CONTROL ROD..................................... Replace Yaw Boost Servo to Mixer Control Rod.............................................. MIXER. ................................................................................................................ Replace Mixer. ..................................................................................................... MIXER REPAIR.................................................................................................. Repair Mixer. ....................................................................................................... NO. 3 COLLECTIVE STICK POSITION SENSOR......................................... Replace No. 3 Collective Stick Position Sensor................................................. MIXER TO FORWARD PRIMARY SERVO CONTROL ROD. .................... Replace Mixer to Forward Primary Servo Control Rod. ................................... MIXER TO AFT PRIMARY SERVO CONTROL ROD.................................. Change 10

11-4-60-1 11-4-60-1 11-4-61-1 11-4-61-1 11-4-62-1 11-4-62-1 11-4-63-1 11-4-63-1 11-4-64-1 11-4-64-1 11-4-65-1 11-4-65-1 11-4-66-1 11-4-66-1 11-4-67-1 11-4-67-1 11-4-68-1 11-4-68-1 11-4-69-1 11-4-69-1 11-4-70-1 11-4-70-1 11-4-71-1 11-4-71-1 11-4-72-1 11-4-72-1 11-4-73-1 11-4-73-1 11-4-74-1 11-4-74-1 11-4-75-1 11-4-75-1 11-4-76-1 11-4-76-1 11-4-77-1 11-4-77-2 11-4-78-1 11-4-78-1 11-4-79-1 11-4-79-1 11-4-80-1 11-4-80-1 11-4-81-1

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TABLE OF CONTENTS (Cont)

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Replace Mixer to Aft Primary Servo Control Rod............................................. MIXER TO LATERAL PRIMARY SERVO CONTROL ROD. ...................... Replace Mixer to Lateral Primary Servo Control Rod....................................... MIXER TO YAW LEVER PUSHROD. ............................................................ Replace Mixer to Yaw Lever Pushrod................................................................ YAW LEVER TO FORWARD QUADRANT CONTROL ROD..................... Replace Yaw Lever to Forward Quadrant Control Rod..................................... YAW LEVER AND SUPPORT (STA 301.0).................................................... Replace Yaw Lever and Support (STA 301.0)................................................... FORWARD QUADRANT AND SUPPORTS. .................................................. Replace Forward Quadrant and Supports. .......................................................... PRIMARY SERVO. ............................................................................................ Replace Primary Servo. ....................................................................................... PRIMARY SERVO PRESSURE SWITCH........................................................ Replace Primary Servo Pressure Switch. ............................................................ PRIMARY SERVO BYPASS VALVE CAP PACKING.................................. Replace Primary Servo Bypass Valve Cap Packing........................................... FORWARD CONTROL ROD. ........................................................................... Replace Forward Control Rod............................................................................. AFT CONTROL ROD......................................................................................... Replace Aft Control Rod. .................................................................................... LATERAL CONTROL ROD.............................................................................. Replace Lateral Control Rod. .............................................................................. WALKING BEAM. ............................................................................................. Replace Walking Beam. ...................................................................................... LONG CONTROL ROD. .................................................................................... Replace Long Control Rod.................................................................................. SWASHPLATE LINKS....................................................................................... Replace Swashplate Links. .................................................................................. FORWARD BELLCRANK................................................................................. Replace Forward Bellcrank. ................................................................................ LATERAL BELLCRANK. ................................................................................. Replace Lateral Bellcrank.................................................................................... AFT BELLCRANK. ............................................................................................ Replace Aft Bellcrank.......................................................................................... RIGHT AND LEFT TIE RODS. ........................................................................ Replace Right and Left Tie Rods........................................................................ FORWARD BELLCRANK SUPPORT.............................................................. Replace Forward Bellcrank Support. .................................................................. AFT BELLCRANK SUPPORT. ......................................................................... Replace Aft Bellcrank Support............................................................................ AFT LONGITUDINAL BELLCRANK SUPPORT ARM. ............................... Replace Aft Longitudinal Bellcrank Support Arm. ............................................ AFT TIE ROD AND SUPPORT FITTING. ......................................................

Change 10

11-4-81-1 11-4-82-1 11-4-82-2 11-4-83-1 11-4-83-1 11-4-84-1 11-4-84-1 11-4-85-1 11-4-85-1 11-4-86-1 11-4-86-1 11-4-87-1 11-4-87-2 11-4-88-1 11-4-88-1 11-4-89-1 11-4-89-1 11-4-90-1 11-4-90-1 11-4-91-1 11-4-91-1 11-4-92-1 11-4-92-1 11-4-93-1 11-4-93-1 11-4-94-1 11-4-94-1 11-4-95-1 11-4-95-1 11-4-96-1 11-4-96-1 11-4-97-1 11-4-97-1 11-4-98-1 11-4-98-1 11-4-99-1 11-4-99-2 11-4-100-1 11-4-100-2 11-4-101-1 11-4-101-2 11-4-102-1 11-4-102-1 11-4-103-1

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Replace Aft Tie Rod and Support Fitting........................................................... CABIN FLIGHT CONTROL CABLES. ............................................................ Replace Cabin Flight Control Cables.................................................................. TAIL CONE FLIGHT CONTROL CABLES. ................................................... Replace Tail Cone Flight Control Cables. .......................................................... TAIL ROTOR PYLON FLIGHT CONTROL CABLES. .................................. Replace Tail Rotor Pylon Flight Control Cables................................................ FLIGHT CONTROL CABLE PULLEYS. ......................................................... Replace Flight Control Cable Pulleys. ................................................................ FLIGHT CONTROL CABLE CONDUIT.......................................................... Replace Flight Control Cable Conduit................................................................ FLIGHT CONTROL CABLE LOCKOUT BLOCKS........................................ Install Flight Control Cable Lockout Blocks...................................................... Remove Flight Control Cable Lockout Blocks................................................... TAIL ROTOR QUADRANT. ............................................................................. Replace Tail Rotor Quadrant............................................................................... TAIL ROTOR QUADRANT REPAIR............................................................... Repair Tail Rotor Quadrant. ................................................................................ TAIL ROTOR SERVO TO TAIL ROTOR QUADRANT PUSHROD............ Replace Tail Rotor Servo to Tail Rotor Quadrant Pushrod. .............................. TAIL ROTOR SERVO AND PITCH CONTROL SHAFT............................... Replace Tail Rotor Servo and Pitch Control Shaft. ........................................... TAIL ROTOR SERVO PRESSURE SWITCH.................................................. Replace Tail Rotor Servo Pressure Switch. ........................................................ TAIL ROTOR SERVO THERMAL RELIEF VALVE. .................................... Replace Tail Rotor Servo Thermal Relief Valve. .............................................. TAIL ROTOR SERVO HYDRAULIC CONNECTORS................................... Replace Tail Rotor Servo Hydraulic Connectors. .............................................. TAIL ROTOR QUADRANT SUPPORT. .......................................................... Replace Tail Rotor Quadrant Support................................................................. TAIL ROTOR QUADRANT SPRING CYLINDERS. ...................................... Replace Tail Rotor Quadrant Spring Cylinders.................................................. TAIL ROTOR QUADRANT SPRING CYLINDER SUPPORT. ..................... Replace Tail Rotor Quadrant Spring Cylinder Support. .................................... SERVO TO SWASHPLATE CONTROL ROD NYLON WASHER. .............. Replace Servo to Swashplate Control Rod Nylon Washer. .............................. TAIL PYLON CABLE........................................................................................ Replace Tail Pylon Cable. ...................................................................................

11-4-103-1 11-4-104-1 11-4-104-2 11-4-105-1 11-4-105-1 11-4-106-1 11-4-106-1 11-4-107-1 11-4-107-1 11-4-108-1 11-4-108-1 11-4-109-1 11-4-109-1 11-4-109-2 11-4-110-1 11-4-110-1 11-4-111-1 11-4-111-1 11-4-112-1 11-4-112-1 11-4-113-1 11-4-113-2 11-4-114-1 11-4-114-1 11-4-115-1 11-4-115-1 11-4-116-1 11-4-116-1 11-4-117-1 11-4-117-1 11-4-118-1 11-4-118-1 11-4-119-1 11-4-119-1 11-4-120-1 11-4-120-1 11-4-121-1 11-4-121-1

Section 11-5 11-5-1 11-5-1.1 11-5-2 11-5-2.1

MAINTENANCE PROCEDURES (BENCH).................................................... YAW CONTROL PEDAL (BENCH)................................................................. Repair Yaw Control Pedal (BENCH). ................................................................ YAW CONTROL PEDAL SUPPORT BEARINGS (BENCH). ....................... Replace Yaw Control Pedal Support Bearings (BENCH). ................................

11-5-1 11-5-1-1 11-5-1-2 11-5-2-1 11-5-2-1

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Page 11-5-3 11-5-3.1 11-5-4 11-5-4.1 11-5-5 11-5-5.1 11-5-6 11-5-6.1 11-5-7 11-5-7.1 11-5-8 11-5-8.1 11-5-9 11-5-9.1 11-5-10 11-5-10.1 11-5-11 11-5-11.1 11-5-12 11-5-12.1 11-5-13 11-5-13.1 11-5-14 11-5-14.1 11-5-15 11-5-15.1 11-5-16 11-5-16.1 11-5-17 11-5-17.1 11-5-18 11-5-18.1 11-5-19 11-5-19.1 11-5-20 11-5-20.1 11-5-21 11-5-21.1 11-5-22 11-5-22.1 11-5-23 11-5-23.1 11-5-24 11-5-24.1

YAW CONTROL PEDAL SUPPORT ASSEMBLY (BENCH). ...................... Repair Yaw Control Pedal Support Assembly (BENCH).................................. YAW CONTROL PEDAL ADJUSTER BEARINGS (BENCH)...................... Replace Yaw Control Pedal Adjuster Bearings (BENCH). ............................... SAS SERVOVALVE (BENCH). ........................................................................ Replace SAS Servovalve (BENCH).................................................................... SAS ACTUATOR (BENCH). ............................................................................. Replace SAS Actuator (BENCH)........................................................................ ROLL ACTUATOR LINKS AND LEVERS (BENCH). .................................. Replace Roll Actuator Links and Levers (BENCH). ......................................... PILOT-ASSIST SERVO MODULE THREE-WAY VALVES (BENCH). ...... Replace Pilot-Assist Servo Module Three-Way Valves (BENCH). .................. PILOT-ASSIST SERVO MODULE PRESSURE REDUCER (BENCH)......... Replace Pilot-Assist Servo Module Pressure Reducer (BENCH)...................... MIXER SMALL LINK ON BELLCRANK/LEVER (BENCH). ...................... Replace Mixer Small Link on Bellcrank/Lever (BENCH). ............................... CONTROL RODS (BENCH).............................................................................. Repair Control Rods (BENCH)........................................................................... CONTROL ROD PIVOT BEARING (BENCH)................................................ Replace Control Rod Pivot Bearing (BENCH). ................................................. TORQUE SHAFT TO SERVO CONTROL RODS (BENCH). ........................ Repair Torque Shaft to Servo Control Rods (BENCH). .................................... BOOST SERVO TO MIXER CONTROL RODS (BENCH)............................ Repair Boost Servo to Mixer Control Rods (BENCH)...................................... PRIMARY SERVO CONTROL RODS (BENCH)............................................ Repair Primary Servo Control Rods (BENCH).................................................. BELLCRANK BEARINGS (BENCH). .............................................................. Replace Bellcrank Bearings (BENCH). .............................................................. YAW LEVER AND SUPPORT BEARINGS (BENCH)................................... Replace Yaw Lever and Support Bearings (BENCH). ...................................... TORQUE SHAFT SUPPORT BEARING (BENCH). ....................................... Replace Torque Shaft Support Bearing (BENCH). ............................................ LEVER ASSEMBLY BEARINGS (BENCH).................................................... Replace Lever Assembly Bearings (BENCH). ................................................... PILOT’S COLLECTIVE STICK SUPPORT (BENCH).................................... Repair Pilot’s Collective Stick Support (BENCH)............................................. PILOT’S COLLECTIVE STICK BELLCRANK SUPPORT (BENCH)........... Repair Pilot’s Collective Stick Bellcrank Support (BENCH)............................ COPILOT’S COLLECTIVE STICK SUPPORT (BENCH). ............................. Repair Copilot’s Collective Stick Support (BENCH). ....................................... COPILOT’S COLLECTIVE STICK BELLCRANK BEARINGS (BENCH)... Replace Copilot’s Collective Stick Bellcrank Bearings (BENCH).................... LONGITUDINAL BELLCRANK BEARINGS (BENCH)................................ Replace Longitudinal Bellcrank Bearings (BENCH). ........................................

Change 10

11-5-3-1 11-5-3-1 11-5-4-1 11-5-4-1 11-5-5-1 11-5-5-1 11-5-6-1 11-5-6-1 11-5-7-1 11-5-7-1 11-5-8-1 11-5-8-1 11-5-9-1 11-5-9-1 11-5-10-1 11-5-10-1 11-5-11-1 11-5-11-2 11-5-12-1 11-5-12-1 11-5-13-1 11-5-13-1 11-5-14-1 11-5-14-1 11-5-15-1 11-5-15-1 11-5-16-1 11-5-16-1 11-5-17-1 11-5-17-2 11-5-18-1 11-5-18-1 11-5-19-1 11-5-19-1 11-5-20-1 11-5-20-1 11-5-21-1 11-5-21-1 11-5-22-1 11-5-22-1 11-5-23-1 11-5-23-2 11-5-24-1 11-5-24-1

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FORWARD, LATERAL, AND AFT BELLCRANK/WALKING BEAM FLANGED BEARINGS (BENCH)..................................................................... Forward, Lateral, and Aft Bellcrank/Walking Beam Flanged Bearings (BENCH).............................................................................................................. TAIL ROTOR PITCH CONTROL SHAFT PRESSED BUSHING (BENCH).............................................................................................................. Replace Tail Rotor Pitch Control Shaft Pressed Bushing (BENCH). ............... TAIL ROTOR QUADRANT BEARINGS (BENCH). ...................................... Replace Tail Rotor Quadrant Bearings (BENCH).............................................. TAIL ROTOR QUADRANT UPPER AND LOWER ARM BEARINGS (BENCH).............................................................................................................. Replace Tail Rotor Quadrant Upper and Lower Arm Bearings (BENCH)....... TAIL ROTOR QUADRANT SPRING CYLINDER SUPPORT TERMINAL BEARINGS (BENCH)......................................................................................... Replace Tail Rotor Quadrant Spring Cylinder Support Terminal Bearings (BENCH).............................................................................................................. YAW CONTROL RODS (BENCH)................................................................... Repair Yaw Control Rods (BENCH).................................................................. CONTROL ROD IDENTIFICATION PLATE (BENCH)................................. Replace Control Rod Identification Plate (BENCH). .........................................

Change 10

11-5-25-1 11-5-25-1 11-5-26-1 11-5-26-1 11-5-27-1 11-5-27-1 11-5-28-1 11-5-28-1 11-5-29-1 11-5-29-2 11-5-30-1 11-5-30-1 11-5-31-1 11-5-31-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

VOLUME

7

TABLE OF CONTENTS Page CHAPTER 12

UTILITY SYSTEM .............................................................................................

12-1

Section 12-1 12-1-1 12-1-1.1 12-1-1.2 12-1-1.3 12-1-2 12-1-2.1 12-1-2.2 12-1-2.3 12-1-3 12-1-3.1 12-1-3.2 12-1-4 12-1-4.1 12-1-4.2 12-1-4.3 12-1-4.4 12-1-5 12-1-5.1 12-1-5.2 12-1-5.3 12-1-5.4 12-1-5.5 12-1-5.6 12-1-5.7 12-1-5.8 12-1-5.9 12-1-5.10 12-1-5.11 12-1-5.12 12-1-5.13 12-1-6 12-1-6.1 12-1-6.2 12-1-6.3 12-1-6.4

EQUIPMENT DESCRIPTION AND DATA ..................................................... FIRE DETECTION SYSTEM DESCRIPTION AND DATA........................... Fire Detection System Description...................................................................... Theory Of Operation............................................................................................ Component Description. ...................................................................................... FIRE EXTINGUISHING SYSTEM DESCRIPTION AND DATA.................. Fire Extinguishing System Description............................................................... Principles Of Operation. ...................................................................................... Component Description. ...................................................................................... WINDSHIELD WIPER SYSTEM DESCRIPTION AND DATA. ................... Windshield Wiper System Description. .............................................................. Principles Of Operation. ...................................................................................... WINDSHIELD ANTI-ICE SYSTEM DESCRIPTION AND DATA. .............. Windshield Anti-ice System. ............................................................................... Power Distribution. .............................................................................................. Normal Operation................................................................................................. Component Description. ...................................................................................... BLADE DE-ICING SYSTEM DESCRIPTION AND DATA........................... Blade De-icing System. ....................................................................................... Power Distribution. .............................................................................................. Ice Detector Operation......................................................................................... Main Rotor Blade System Automatic Mode Operation. .................................... Tail Rotor Blade System Automatic Mode Operation. ...................................... Main and Tail Blade De-ice System Test Mode. ............................................... Icing Rate Meter Test. ......................................................................................... Main and Tail Blade Manual Mode Operation................................................... Main Blade Fail/Fault Detection. ........................................................................ Tail Blade Fail Detection..................................................................................... Blade De-ice Test Panel. ..................................................................................... Blade De-ice Test Panel Operation. .................................................................... Blade De-ice Test Panel Fault Detection............................................................ CARGO HOOK SYSTEM DESCRIPTION AND DATA. ............................... Cargo Hook System. ............................................................................................ Crewman’s Pendant Control................................................................................ Power Distribution. .............................................................................................. Normal Release. ...................................................................................................

12-1-1 12-1-1-1 12-1-1-1 12-1-1-1 12-1-1-2 12-1-2-1 12-1-2-1 12-1-2-1 12-1-2-2 12-1-3-1 12-1-3-1 12-1-3-1 12-1-4-1 12-1-4-1 12-1-4-1 12-1-4-1 12-1-4-2 12-1-5-1 12-1-5-1 12-1-5-1 12-1-5-2 12-1-5-2 12-1-5-3 12-1-5-3 12-1-5-4 12-1-5-4 12-1-5-5 12-1-5-5 12-1-5-6 12-1-5-6 12-1-5-6 12-1-6-1 12-1-6-1 12-1-6-1 12-1-6-1 12-1-6-1

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TABLE OF CONTENTS (Cont)

Page 12-1-6.5 12-1-6.6 12-1-6.7 12-1-6.8

Manual Release. ................................................................................................... Emergency Release. ............................................................................................. Test Function........................................................................................................ Cargo Hook Lights. .............................................................................................

12-1-6-2 12-1-6-2 12-1-6-2 12-1-6-2

Section 12-2 12-2-1 12-2-1.1 12-2-1.2 12-2-2 12-2-3 12-2-4 12-2-4.1 12-2-5 12-2-5.1 12-2-6 12-2-7 12-2-8

TROUBLESHOOTING ....................................................................................... FIRE DETECTION SYSTEM............................................................................. Quick Check......................................................................................................... Detailed Check. .................................................................................................... FIRE EXTINGUISHING SYSTEM.................................................................... WINDSHIELD WIPER SYSTEM. ..................................................................... WINDSHIELD ANTI-ICE SYSTEM. ................................................................ Operational/Troubleshooting Procedure. ............................................................. BLADE DE-ICING SYSTEM............................................................................. Operational/Troubleshooting Procedure. ............................................................. CARGO HOOK SYSTEM. ................................................................................. CREWMAN’S CARGO HOOK PENDANT (BENCH).................................... BLADE DE-ICE TEST PANEL (BENCH)........................................................

12-2-1 12-2-1-1 12-2-1-1 12-2-1-2 12-2-2-1 12-2-3-1 12-2-4-1 12-2-4-1 12-2-5-1 12-2-5-1 12-2-6-1 12-2-7-1 12-2-8-1

Section 12-3 12-3-1 12-3-1.1 12-3-2 12-3-2.1 12-3-2.2 12-3-3 12-3-3.1 12-3-3.2 12-3-3.3

ON AIRCRAFT INSPECTIONS ........................................................................ FIRE EXTINGUISHING SYSTEM INSPECTION. .......................................... Discharge Tubes Inspection................................................................................. WINDSHIELD WIPER INSPECTIONS. ........................................................... Windshield Wiper Arm and Link Inspection...................................................... Check/Adjust Windshield Wiper Arm Pressure. ................................................ TAIL ROTOR BLADE DEICE INSPECTIONS. .............................................. Tail Rotor Stator Brush Inspection. .................................................................... Tail Rotor Blade Deice Slipring Cables Inspections.......................................... Polyurethane Mold Inspection. ............................................................................

12-3-1 12-3-1-1 12-3-1-1 12-3-2-1 12-3-2-1 12-3-2-1 12-3-3-1 12-3-3-1 12-3-3-2 12-3-3-2

Section 12-4 12-4-1 12-4-1.1 12-4-2 12-4-2.1 12-4-3 12-4-3.1 12-4-4 12-4-4.1 12-4-5 12-4-5.1 12-4-6 12-4-6.1 12-4-7

MAINTENANCE PROCEDURES ..................................................................... FIRE EXTINGUISHING SYSTEM AGENT CONTAINER. ........................... Replace Fire Extinguishing System Agent Container. ....................................... FIRE EXTINGUISHING AGENT CONTAINER CARTRIDGE. .................... Replace Fire Extinguishing Agent Container Cartridge. .................................... FIRE EXTINGUISHING AGENT CONTAINER CHECK VALVE................ Replace Fire Extinguishing Agent Container Check Valve. .............................. FIRE EXTINGUISHING AGENT CONTAINER THERMAL DISC. ............. Replace Fire Extinguishing Agent Container Thermal Disc.............................. FIRE EXTINGUISHING SYSTEM DISCHARGE TUBES. ............................ Replace Fire Extinguishing System Discharge Tubes........................................ FIRE EXTINGUISHING SYSTEM DIRECTIONAL VALVE......................... Replace Fire Extinguishing System Directional Valve. ..................................... APU T-HANDLE.................................................................................................

12-4-1 12-4-1-1 12-4-1-1 12-4-2-1 12-4-2-1 12-4-3-1 12-4-3-1 12-4-4-1 12-4-4-1 12-4-5-1 12-4-5-1 12-4-6-1 12-4-6-1 12-4-7-1

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TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 12-4-7.1 12-4-8 12-4-8.1 12-4-9 12-4-9.1 12-4-10 12-4-10.1 12-4-11 12-4-11.1 12-4-12 12-4-12.1 12-4-13 12-4-13.1 12-4-14 12-4-14.1 12-4-15 12-4-15.1 12-4-16 12-4-16.1 12-4-17 12-4-17.1 12-4-18 12-4-18.1 12-4-19 12-4-19.1 12-4-20 12-4-20.1 12-4-21 12-4-21.1 12-4-22 12-4-22.1 12-4-23 12-4-23.1 12-4-24 12-4-24.1 12-4-25 12-4-25.1 12-4-26 12-4-26.1 12-4-27 12-4-27.1 12-4-28 12-4-28.1 12-4-29

Replace APU T-Handle. ...................................................................................... APU T-HANDLE FIRE DETECTION LAMPS. ............................................... Replace APU T-Handle Fire Detection Lamps. ................................................. APU T-HANDLE FIRE EXTINGUISHER SWITCH ASSEMBLY................. Replace APU T-Handle Fire Extinguisher Switch Assembly............................ FIRE EXTINGUISHER T-HANDLE LAMPS................................................... Replace Fire Extinguisher T-Handle Lamps....................................................... FIRE DETECTION SYSTEM CONTROL AMPLIFIER.................................. Replace Fire Detection System Control Amplifier. ............................................ FLAME DETECTORS. ....................................................................................... Replace Flame Detectors. .................................................................................... FIRE DETECTOR TEST SWITCH.................................................................... Replace Fire Detector Test Switch...................................................................... WINDSHIELD WIPER CONVERTER.............................................................. Replace Windshield Wiper Converter................................................................. WINDSHIELD WIPER MOTOR. ...................................................................... Replace Windshield Wiper Motor....................................................................... WINDSHIELD WIPER FLEXIBLE DRIVE SHAFT. ...................................... Replace Windshield Wiper Flexible Drive Shaft. .............................................. WINDSHIELD WIPER BLADE......................................................................... Replace Windshield Wiper Blade. ...................................................................... WINDSHIELD WIPER BLADE INSERT. ........................................................ Replace Windshield Wiper Blade Insert. ............................................................ WINDSHIELD WIPER ARM AND LINK........................................................ Replace Windshield Wiper Arm and Link. ........................................................ WINDSHIELD ANTI-ICE CONTROL UNIT. .................................................. Replace Windshield Anti-Ice Control Unit......................................................... WINDSHIELD ANTI-ICE SWITCH.................................................................. Replace Windshield Anti-Ice Switch. ................................................................. ENGINE AIR INLET ANTI-ICING VALVE.................................................... Replace Engine Air Inlet Anti-Icing Valve. ....................................................... ENGINE AIR INLET ANTI-ICE THERMAL SWITCH. ................................. Replace Engine Air Inlet Anti-Ice Thermal Switch. .......................................... BLADE DEICE FLANGE SEAL AND PACKING. ......................................... Replace Blade Deice Flange Seal and Packing. ................................................. BLADE DEICE TUBE ASSEMBLY AND PACKING. ................................... Replace Blade Deice Tube Assembly and Packing............................................ MAIN ROTOR BLADE DEICE DISTRIBUTOR AND SLIPRING/BRUSH ASSEMBLY......................................................................................................... Replace Main Rotor Blade Deice Distributor and Slipring/Brush Assembly. .. ICING RATE METER. ....................................................................................... Replace Icing Rate Meter. ................................................................................... ICING RATE METER LAMPS.......................................................................... Replace Icing Rate Meter Lamps........................................................................ BLADE DEICE CONTROL PANEL. ................................................................ Change 10

12-4-7-1 12-4-8-1 12-4-8-1 12-4-9-1 12-4-9-1 12-4-10-1 12-4-10-1 12-4-11-1 12-4-11-1 12-4-12-1 12-4-12-1 12-4-13-1 12-4-13-1 12-4-14-1 12-4-14-1 12-4-15-1 12-4-15-1 12-4-16-1 12-4-16-1 12-4-17-1 12-4-17-1 12-4-18-1 12-4-18-1 12-4-19-1 12-4-19-1 12-4-20-1 12-4-20-1 12-4-21-1 12-4-21-1 12-4-22-1 12-4-22-1 12-4-23-1 12-4-23-1 12-4-24-1 12-4-24-1 12-4-25-1 12-4-25-1 12-4-26-1 12-4-26-2 12-4-27-1 12-4-27-1 12-4-28-1 12-4-28-1 12-4-29-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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Page 12-4-29.1 12-4-30 12-4-30.1 12-4-31 12-4-31.1 12-4-32 12-4-32.1 12-4-33 12-4-33.1 12-4-34 12-4-34.1 12-4-35 12-4-35.1 12-4-36 12-4-36.1 12-4-37 12-4-37.1 12-4-38 12-4-38.1 12-4-39 12-4-39.1 12-4-40 12-4-40.1 12-4-41 12-4-41.1 12-4-42 12-4-42.1 12-4-43 12-4-43.1 12-4-44 12-4-44.1 12-4-45 12-4-45.1 12-4-46 12-4-46.1 12-4-47 12-4-47.1 12-4-48 12-4-48.1 12-4-49 12-4-49.1 12-4-50 12-4-50.1 12-4-51 V7-iv

Replace Blade Deice Control Panel. ................................................................... BLADE DEICE CONTROL PANEL TEST-IN-PROGRESS LAMP............... Replace Blade Deice Control Panel TEST-IN-PROGRESS Lamp. .................. BLADE DEICE CONTROL PANEL INFORMATION PLATE AND LAMPS................................................................................................................. Replace Blade Deice Control Panel Information Plate and Lamps. .................. BLADE DEICE CONTROLLER........................................................................ Replace Blade Deice Controller. ......................................................................... BLADE DEICE AUXILIARY JUNCTION BOX. ............................................ Replace Blade Deice Auxiliary Junction Box. ................................................... BLADE DEICE CURRENT LIMITERS, CL10 THROUGH CL15. ................ Replace Blade Deice Current Limiters, CL10 through CL15............................ BLADE DEICE CURRENT LIMITER HOLDER............................................. Replace Blade Deice Current Limiter Holder..................................................... BLADE DEICE RELAY, K61............................................................................ Replace Blade Deice Relay, K61. ....................................................................... BLADE DEICE RELAY, K64............................................................................ Replace Blade Deice Relay, K64. ....................................................................... BLADE DEICE RELAY, K65............................................................................ Replace Blade Deice Relay, K65. ....................................................................... BLADE DEICE CONTACTOR, K60................................................................. Replace Blade Deice Contactor, K60.................................................................. BLADE DEICE CONTACTOR, K62................................................................. Replace Blade Deice Contactor, K62.................................................................. BLADE DEICE CONTACTOR, K63................................................................. Replace Blade Deice Contactor, K63.................................................................. BLADE DEICE CURRENT TRANSFORMER, T10. ....................................... Replace Blade Deice Current Transformer, T10. ............................................... BLADE DEICE CURRENT TRANSFORMER, T14. ....................................... Replace Blade Deice Current Transformer, T14. ............................................... MAIN ROTOR BLADE DEICE JUNCTION BOX. ......................................... Replace Main Rotor Blade Deice Junction Box................................................. BLADE DEICE DIODE, CR11, CR15, AND CR16......................................... Replace Blade Deice Diode, CR11, CR15, and CR16....................................... BLADE DEICE TEST PANEL........................................................................... Replace Blade Deice Test Panel. ........................................................................ BLADE DEICE TEST PANEL INDICATOR LAMPS..................................... Replace Blade Deice Test Panel Indicator Lamps. ............................................ BLADE DEICE TEST PANEL INFORMATION PLATE/LAMPS. ................ Replace Blade Deice Test Panel Information Plate/Lamps................................ BLADE DEICE OAT SENSOR. ........................................................................ Replace Blade Deice OAT Sensor. ..................................................................... BLADE DEICE ICE DETECTOR...................................................................... Replace Blade Deice Ice Detector....................................................................... BLADE DEICE ICE DETECTOR HOSE ASSEMBLY. .................................. Change 10

12-4-29-1 12-4-30-1 12-4-30-1 12-4-31-1 12-4-31-1 12-4-32-1 12-4-32-1 12-4-33-1 12-4-33-1 12-4-34-1 12-4-34-1 12-4-35-1 12-4-35-1 12-4-36-1 12-4-36-1 12-4-37-1 12-4-37-1 12-4-38-1 12-4-38-1 12-4-39-1 12-4-39-1 12-4-40-1 12-4-40-1 12-4-41-1 12-4-41-1 12-4-42-1 12-4-42-1 12-4-43-1 12-4-43-1 12-4-44-1 12-4-44-1 12-4-45-1 12-4-45-1 12-4-46-1 12-4-46-1 12-4-47-1 12-4-47-1 12-4-48-1 12-4-48-1 12-4-49-1 12-4-49-1 12-4-50-1 12-4-50-1 12-4-51-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 12-4-51.1 12-4-52 12-4-52.1 12-4-53 12-4-53.1 12-4-54 12-4-54.1 12-4-55 12-4-55.1 12-4-56 12-4-56.1 12-4-57 12-4-57.1 12-4-58 12-4-58.1 12-4-59 12-4-59.1 12-4-60 12-4-60.1 12-4-61 12-4-61.1 12-4-62 12-4-62.1 12-4-63 12-4-63.1 12-4-64 12-4-64.1 Section 12-5 12-5-1 12-5-1.1 12-5-2 12-5-2.1 12-5-3 12-5-3.1 12-5-4 12-5-4.1 12-5-5 12-5-5.1

Replace Blade Deice Ice Detector Hose Assembly............................................ TAIL ROTOR BLADE DEICE SLIPRING ROTOR. ....................................... Replace Tail Rotor Blade Deice Slipring Rotor. ................................................ TAIL ROTOR BLADE DEICE SLIPRING STATOR. ..................................... Replace Tail Rotor Blade Deice Slipring Stator................................................. TAIL ROTOR BLADE DEICE SLIPRING STATOR BRUSH ASSEMBLY.............................................................................................................. Replace Tail Rotor Blade Deice Slipring Stator Brush Assembly. ................... TAIL ROTOR BLADE DEICE SLIPRING STATOR BRUSHES AND RETAINER BOARD. .......................................................................................... Replace Tail Rotor Blade Deice Slipring Stator Brushes and Retainer Board. ................................................................................................................... TAIL ROTOR BLADE DEICE SLIPRING STATOR BRUSH ASSEMBLY ELECTRICAL CONNECTOR, J327. ................................................................. Replace Tail Rotor Blade Deice Slipring Stator Brush Assembly Electrical Connector, J327. .................................................................................................. CARGO HOOK. .................................................................................................. Replace Cargo Hook............................................................................................ CARGO HOOK EXPLOSIVE CARTRIDGE.................................................... Replace Cargo Hook Explosive Cartridge. ......................................................... CARGO HOOK KEEPER AND KEEPER SPRING......................................... Replace Cargo Hook Keeper and Keeper Spring. .............................................. CARGO HOOK MANUAL RELEASE HANDLE............................................ Replace Cargo Hook Manual Release Handle.................................................... CARGO HOOK SUPPORT FITTING AND RETAINER BUSHINGS. .......... Replace Cargo Hook Support Fitting and Retainer Bushings............................ CREWMAN’S CARGO HOOK PENDANT. .................................................... Replace Crewman’s Cargo Hook Pendant.......................................................... CREWMAN’S CARGO HOOK PENDANT SWITCHES AND GUARDS. ... Replace Crewman’s Cargo Hook Pendant Switches and Guards. ..................... CREWMAN’S CARGO HOOK PENDANT CABLE ASSEMBLY. ............... Replace Crewman’s Cargo Hook Pendant Cable Assembly..............................

12-4-51-1 12-4-52-1 12-4-52-1 12-4-53-1 12-4-53-1

MAINTENANCE PROCEDURES (BENCH).................................................... WINDSHIELD WIPER MOTOR (BENCH)...................................................... Repair Windshield Wiper Motor (BENCH). ...................................................... BLADE DEICE TEST PANEL ROTARY SELECTOR SWITCH (BENCH).............................................................................................................. Replace Blade Deice Test Panel Rotary Selector Switch (BENCH)................. BLADE DEICE TEST PANEL INDICATOR LIGHT (BENCH). ................... Replace Blade Deice Test Panel Indicator Light (BENCH). ............................. BLADE DEICE TEST PANEL ELECTRICAL CONNECTOR (BENCH). .... Replace Blade Deice Test Panel Electrical Connector (BENCH). .................... BLADE DEICE TEST PANEL PRINTED WIRING BOARD (BENCH). ...... Replace Blade Deice Test Panel Printed Wiring Board (BENCH). ..................

12-5-1 12-5-1-1 12-5-1-1

12-4-54-1 12-4-54-1 12-4-55-1 12-4-55-1 12-4-56-1 12-4-56-1 12-4-57-1 12-4-57-1 12-4-58-1 12-4-58-1 12-4-59-1 12-4-59-1 12-4-60-1 12-4-60-1 12-4-61-1 12-4-61-2 12-4-62-1 12-4-62-1 12-4-63-1 12-4-63-1 12-4-64-1 12-4-64-1

12-5-2-1 12-5-2-1 12-5-3-1 12-5-3-1 12-5-4-1 12-5-4-1 12-5-5-1 12-5-5-1

Change 10

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TABLE OF CONTENTS (Cont)

Page 12-5-6 12-5-6.1 12-5-7

12-5-8 12-5-8.1

BLADE DEICE TEST PANEL CIRCUIT BOARD (BENCH). ....................... Replace Blade Deice Test Panel Circuit Board (BENCH). ............................... BLADE DEICE TEST PANEL PRINTED WIRING BOARD AND CIRCUIT BOARD COMPONENTS (BENCH)................................................. Replace Blade Deice Test Panel Printed Wiring Board and Circuit Board Components (BENCH). ....................................................................................... DIRECTIONAL CONTROL VALVE (BENCH)............................................... Repair Directional Control Valve (BENCH). .....................................................

12-5-7-2 12-5-8-1 12-5-8-1

CHAPTER 13

ENVIRONMENTAL CONTROL SYSTEMS....................................................

13-1

Section 13-1 13-1-1 13-1-1.1 13-1-1.2 13-1-1.3 13-1-1.4 13-1-2 13-1-2.1 13-1-2.2 13-1-2.3

EQUIPMENT DESCRIPTION AND DATA ..................................................... HEATING AND VENTILATION SYSTEM DESCRIPTION AND DATA. .. Description. .......................................................................................................... Power Distribution. .............................................................................................. Ventilation System Operation.............................................................................. Heating System Operation. .................................................................................. ENVIRONMENTAL CONTROL SYSTEM DESCRIPTION AND DATA. .. Description. .......................................................................................................... Power Distribution. .............................................................................................. System Operation. ................................................................................................

13-1-1 13-1-1-1 13-1-1-1 13-1-1-1 13-1-1-1 13-1-1-1 13-1-2-1 13-1-2-1 13-1-2-4 13-1-2-5

Section 13-2 13-2-1 13-2-1.1 13-2-2 13-2-2.1

TROUBLESHOOTING ....................................................................................... HEATING AND VENTILATION SYSTEM. .................................................... Operational/Troubleshooting Procedure. ............................................................. ENVIRONMENTAL CONTROL SYSTEM (ECS)........................................... Operational/Troubleshooting Procedure. .............................................................

13-2-1 13-2-1-1 13-2-1-1 13-2-2-1 13-2-2-1

Section 13-3 13-3-1 13-3-1.1 13-3-2 13-3-2.1

ON AIRCRAFT INSPECTIONS ........................................................................ HEATING AND VENTILATION SYSTEM INSPECTION. ........................... Bleed-Air Tube Inspection................................................................................... ENVIRONMENTAL CONTROL SYSTEM INSPECTION. ............................ Environmental Control System Duct Inspection.................................................

13-3-1 13-3-1-1 13-3-1-1 13-3-2-1 13-3-2-1

Section 13-4 13-4-1 13-4-1.1 13-4-2

MAINTENANCE PROCEDURES ..................................................................... HEATING AND VENTILATION SYSTEM MIXING VALVE...................... Replace Heating and Ventilation System Mixing Valve.................................... HEATING AND VENTILATION SYSTEM UPPER TEMPERATURE SENSING TUBE. ................................................................................................ Replace Heating and Ventilation System Upper Temperature Sensing Tube. .. HEATING AND VENTILATION SYSTEM LOWER TEMPERATURE SENSING TUBE. ................................................................................................ Replace Heating and Ventilation System Lower Temperature Sensing Tube... HEATING AND VENTILATION SYSTEM BLEED-AIR TUBE................... Replace Heating and Ventilation System Bleed-Air Tube.................................

13-4-1 13-4-1-1 13-4-1-1

12-5-7.1

13-4-2.1 13-4-3 13-4-3.1 13-4-4 13-4-4.1

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12-5-6-1 12-5-6-1 12-5-7-1

13-4-2-1 13-4-2-1 13-4-3-1 13-4-3-2 13-4-4-1 13-4-4-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 13-4-5 13-4-5.1 13-4-6 13-4-6.1 13-4-7 13-4-7.1 13-4-8 13-4-8.1 13-4-9 13-4-9.1 13-4-10 13-4-10.1 13-4-11 13-4-11.1 13-4-12 13-4-12.1 13-4-13 13-4-13.1 13-4-14 13-4-14.1 13-4-14.2 13-4-14.3 13-4-14.4 13-4-14.5 13-4-14.6 13-4-15 13-4-15.1 13-4-16 13-4-16.1 13-4-17 13-4-17.1 13-4-18 13-4-18.1 13-4-19 13-4-19.1 13-4-20 13-4-20.1

HEATING AND VENTILATION SYSTEM MIXTURE TEMPERATURE SENSOR............................................................................................................... Replace Heating and Ventilation System Mixture Temperature Sensor. .......... HEATING AND VENTILATION SYSTEM AIR OUTLETS.......................... Replace Heating and Ventilation System Air Outlets. ....................................... HEATING AND VENTILATION SYSTEM HEATER CONTROL SHAFT.. Replace Heating and Ventilation System Heater Control Shaft. ....................... HEATING AND VENTILATION SYSTEM HEATER CONTROL ADAPTER............................................................................................................ Replace Heating and Ventilation System Heater Control Adapter.................... HEATING AND VENTILATION SYSTEM HEATER MUFFLER. ............... Replace Heating and Ventilation System Heater Muffler. ................................. HEATING AND VENTILATION SYSTEM COCKPIT DOOR DUCTS. ...... Replace Heating and Ventilation System Cockpit Door Ducts. ........................ HEATING AND VENTILATION SYSTEM HEATER DUCT........................ Replace Heating and Ventilation System Heater Duct....................................... HEATING AND VENTILATION SYSTEM BLOWER................................... Replace Heating and Ventilation System Blower............................................... HEATING AND VENTILATION SYSTEM AIR DUCT VALVE ASSEMBLIES........................................................................................................... Replace Heating and Ventilation System Air Duct Valve Assemblies. ............ HEATING AND VENTILATION SYSTEM REPAIR. .................................... General Repairs.................................................................................................... Replace Cockpit Duct Seal.................................................................................. Replace Upper Cabin Duct Seals. ....................................................................... Replace Lower Cabin Duct Seal. ........................................................................ Replace Muffler/Plenum Seals and Gaskets........................................................ Replace Heater Duct Seal and Screen................................................................. ENVIRONMENTAL CONTROL SYSTEM EVAPORATOR BLOWER........ Replace Environmental Control System Evaporator Blower. ............................ ENVIRONMENTAL CONTROL SYSTEM EVAPORATOR ELECTRICAL HARNESS............................................................................................................ Replace Environmental Control System Evaporator Electrical Harness. .......... ENVIRONMENTAL CONTROL SYSTEM TEMPERATURE LIMITING SWITCH............................................................................................................... Replace Environmental Control System Temperature Limiting Switch............ ENVIRONMENTAL CONTROL SYSTEM LOW AND HIGH TEMPERATURE SWITCHES. ............................................................................................. Replace Environmental Control System Low and High Temperature Switches................................................................................................................ ENVIRONMENTAL CONTROL SYSTEM CONDENSER BLOWER........... Replace Environmental Control System Condenser Blower.............................. ENVIRONMENTAL CONTROL SYSTEM CONDENSER ELECTRICAL HARNESS............................................................................................................ Replace Environmental Control System Condenser Electrical Harness. ...........

Change 10

13-4-5-1 13-4-5-1 13-4-6-1 13-4-6-1 13-4-7-1 13-4-7-1 13-4-8-1 13-4-8-1 13-4-9-1 13-4-9-1 13-4-10-1 13-4-10-1 13-4-11-1 13-4-11-1 13-4-12-1 13-4-12-1 13-4-13-1 13-4-13-1 13-4-14-1 13-4-14-2 13-4-14-2 13-4-14-2 13-4-14-5 13-4-14-5 13-4-14-8 13-4-15-1 13-4-15-1 13-4-16-1 13-4-16-1 13-4-17-1 13-4-17-1 13-4-18-1 13-4-18-1 13-4-19-1 13-4-19-1 13-4-20-1 13-4-20-1

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TABLE OF CONTENTS (Cont)

Page 13-4-21 13-4-21.1 13-4-22 13-4-22.1 13-4-23 13-4-23.1 13-4-24 13-4-24.1 13-4-25 13-4-25.1 13-4-26 13-4-26.1 13-4-27 13-4-27.1 13-4-28 13-4-28.1 13-4-29 13-4-29.1 Section 13-5 13-5-1 13-5-1.1 13-5-2 13-5-2.1 13-5-3 13-5-3.1 13-5-4 13-5-4.1 13-5-5 13-5-5.1 13-5-6 13-5-6.1 13-5-7 13-5-7.1 13-5-8

V7-viii

ENVIRONMENTAL CONTROL SYSTEM PLENUM. ................................... Replace Environmental Control System Plenum................................................ ENVIRONMENTAL CONTROL SYSTEM SUPPLY DUCTING................... Replace Environmental Control System Supply Ducting................................... ENVIRONMENTAL CONTROL SYSTEM CONDENSER EXHAUST DUCT. .................................................................................................................. Replace Environmental Control System Condenser Exhaust Duct.................... ENVIRONMENTAL CONTROL SYSTEM CONDENSER INTAKE DUCT. .................................................................................................................. Replace Environmental Control System Condenser Intake Duct....................... ENVIRONMENTAL CONTROL SYSTEM AMBIENT AIR DUCT. ............. Replace Environmental Control System Ambient Air Duct. ............................. ENVIRONMENTAL CONTROL SYSTEM TEMPERATURE SENSOR. ...... Replace Environmental Control System Temperature Sensor. .......................... ENVIRONMENTAL CONTROL SYSTEM ELECTRICAL CONTROL UNIT (ECU)......................................................................................................... Replace Environmental Control System Electrical Control Unit (ECU)........... ENVIRONMENTAL CONTROL SYSTEM DUCTING REPAIR. .................. Repair Environmental Control System Ducting. ................................................ ENVIRONMENTAL CONTROL SYSTEM FILTER/DRYER......................... Replace Environmental Control System Filter/Dryer. ........................................ MAINTENANCE PROCEDURES (BENCH).................................................... MIXTURE TEMPERATURE SENSOR PRESSURE BELLOWS (BENCH). Repair Mixture Temperature Sensor Pressure Bellows (BENCH). .................. BLOWER UNIT (BENCH). .............................................................................. Repair Blower Unit (BENCH). .......................................................................... ENVIRONMENTAL CONTROL SYSTEM CONDENSER PALLET (BENCH).............................................................................................................. Replace Environmental Control System Condenser Pallet (BENCH). .............. ENVIRONMENTAL CONTROL SYSTEM CONDENSER LINES, BURST DISC, AND RELIEF VALVE (BENCH)........................................................... Replace Environmental Control System Condenser Lines, Burst Disc, and Relief Valve (BENCH)........................................................................................ ENVIRONMENTAL CONTROL SYSTEM CONDENSER ANDTRANSITION DUCTS (BENCH)..................................................................................... Replace Environmental Control System Condenser and Transition Ducts (BENCH).............................................................................................................. ENVIRONMENTAL CONTROL SYSTEM EVAPORATOR PALLET (BENCH).............................................................................................................. Replace Environmental Control System Evaporator Pallet (BENCH). ............. ENVIRONMENTAL CONTROL SYSTEM COMPRESSOR (BENCH)......... Replace Environmental Control System Compressor (BENCH). ...................... ENVIRONMENTAL CONTROL SYSTEM HOT GAS BYPASS (HGBP) VALVE (BENCH). ..............................................................................................

Change 10

13-4-21-1 13-4-21-1 13-4-22-1 13-4-22-1 13-4-23-1 13-4-23-1 13-4-24-1 13-4-24-1 13-4-25-1 13-4-25-1 13-4-26-1 13-4-26-1 13-4-27-1 13-4-27-1 13-4-28-1 13-4-28-1 13-4-29-1 13-4-29-1 13-5-1 13-5-1-1 13-5-1-1 13-5-2-1 13-5-2-1 13-5-3-1 13-5-3-2 13-5-4-1 13-5-4-1 13-5-5-1 13-5-5-1 13-5-6-1 13-5-6-1 13-5-7-1 13-5-7-2 13-5-8-1

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TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 13-5-8.1 13-5-9 13-5-9.1 13-5-10 13-5-10.1 13-5-11 13-5-11.1 13-5-12 13-5-12.1 13-5-13 13-5-13.1 13-5-14 13-5-14.1

Replace Environmental Control System Hot Gas Bypass (HGBP) Valve (BENCH).............................................................................................................. ENVIRONMENTAL CONTROL SYSTEM DUCTS, EVAPORATOR, AND HEATER/DEMISTER (BENCH).............................................................. Replace Environmental Control System Ducts, Evaporator, and Heater/ Demister (BENCH).............................................................................................. ENVIRONMENTAL CONTROL SYSTEM FILTER/DRIER (BENCH)......... Replace Environmental Control System Filter/Drier (BENCH). ....................... ENVIRONMENTAL CONTROL SYSTEM ELECTRICAL PALLET (BENCH).............................................................................................................. Replace Environmental Control System Electrical Pallet (BENCH)................. ENVIRONMENTAL CONTROL SYSTEM SERVICING MANIFOLD (BENCH).............................................................................................................. Replace Environmental Control System Servicing Manifold (BENCH). .......... ENVIRONMENTAL CONTROL SYSTEM SIGHT GLASS (BENCH). ........ Replace Environmental Control System Sight Glass (BENCH)........................ ENVIRONMENTAL CONTROL SYSTEM HIGH AND LOW PRESSURE SWITCHES (BENCH)......................................................................................... Replace Environmental Control System High and Low Pressure Switches (BENCH)..............................................................................................................

13-5-8-1 13-5-9-1 13-5-9-2 13-5-10-1 13-5-10-1 13-5-11-1 13-5-11-1 13-5-12-1 13-5-12-1 13-5-13-1 13-5-13-1 13-5-14-1 13-5-14-1

CHAPTER 14

HOIST AND WINCHES.....................................................................................

14-1

Section 14-1 14-1-1

14-1-1

14-1-2.1 14-1-2.2

EQUIPMENT DESCRIPTION AND DATA ..................................................... RESCUE HOIST SYSTEM DESCRIPTION AND DATA HOIST, BL−27100−71 HOIST, 42315−10 ................................................................. System Description. ............................................................................................. Principles Of Operation. ...................................................................................... Component Description. ...................................................................................... RESCUE HOIST SYSTEM DESCRIPTION AND DATA HOIST BL−29900−30 .............................................................................................. General. ................................................................................................................ Description. ..........................................................................................................

14-1-2-1 14-1-2-1 14-1-2-1

Section 14-2 14-2-1 14-2-2

TROUBLESHOOTING ....................................................................................... RESCUE HOIST SYSTEM HOIST, BL−27100−71 HOIST, 42315−10 ............... RESCUE HOIST SYSTEM HOIST BL−29900−30 .............................................

14-2-1 14-2-1-1 14-2-2-1

Section 14-3 14-3-1 14-3-1.1 14-3-1.2 14-3-2 14-3-2.1 14-3-2.2

ON AIRCRAFT INSPECTIONS ........................................................................ RESCUE HOIST INSPECTION HOIST, BL−27100−71 HOIST, 42315−10 ......... Inspect Rescue Hoist Cable HOIST, BL−27100−71 ............................................... Inspect Rescue Hoist Cable HOIST, 42315−10 .................................................... RESCUE HOIST INSPECTIONS HOIST BL−29900−30 ................................... In-Flight Load Test. ............................................................................................. Dimensional Check. .............................................................................................

14-3-1 14-3-1-1 14-3-1-1 14-3-1-3 14-3-2-1 14-3-2-1 14-3-2-3

14-1-1.1 14-1-1.2 14-1-1.3 14-1-2

Change 10

14-1-1-1 14-1-1-1 14-1-1-1 14-1-1-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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TABLE OF CONTENTS (Cont)

Page

Section 14-4 14-4-1 14-4-1.1 14-4-1.2 14-4-2 14-4-2.1 14-4-2.2 14-4-3 14-4-3.1 14-4-3.2 14-4-4 14-4-4.1 14-4-4.2 14-4-5 14-4-5.1 14-4-5.2 14-4-6 14-4-6.1 14-4-6.2 14-4-7 14-4-7.1 14-4-7.2 14-4-8 14-4-8.1 14-4-8.2 14-4-9 14-4-9.1 14-4-9.2 14-4-10 14-4-10.1 14-4-11 14-4-11.1 14-4-12 14-4-12.1 14-4-13 14-4-13.1 14-4-14 14-4-14.1 14-4-15 14-4-15.1 14-4-16 14-4-16.1 14-4-17

V7-x

MAINTENANCE PROCEDURES .................................................................... RESCUE HOIST HOIST, BL−27100−71 HOIST, 42315−10 .................................. Replace Rescue Hoist HOIST, BL−27100−71 ....................................................... Replace Rescue Hoist HOIST, 42315−10 ............................................................ EXPLOSIVE CARTRIDGE HOIST, BL−27100−71 HOIST, 42315−10 ................ Replace Explosive Cartridge HOIST, BL−27100−71 ............................................ Replace Explosive Cartridge HOIST, 42315−10 ................................................. CABLE CUTTER HOIST, BL−27100−71 HOIST, 42315−10 ................................ Replace Cable Cutter HOIST, BL−27100−71 ......................................................... Replace Cable Cutter HOIST, 42315−10 . ............................................................. RESCUE HOIST CABLE HOIST, BL−27100−71 HOIST, 42315−10 .................... Replace Rescue Hoist Cable HOIST, BL−27100−71 . ........................................... Replace Rescue Hoist Cable HOIST, 42315−10 . ................................................ RESCUE HOIST HOOK HOIST, BL−27100−71 HOIST, 42315−10 ..................... Replace Rescue Hoist Hook HOIST, BL−27100−71 .............................................. Replace Rescue Hoist Hook HOIST, 42315−10 ................................................... HYDRAULIC MOTOR HOIST, BL−27100−71 HOIST, 42315−10 ....................... Replace Hydraulic Motor HOIST, BL−27100−71 . ................................................. Replace Hydraulic Motor HOIST, 42315−10 . ...................................................... HEAT EXCHANGER HOIST, BL−27100−71 HOIST, 42315−10 .......................... Replace Heat Exchanger HOIST, BL−27100−71 .................................................... Replace Heat Exchanger HOIST, 42315−10 ......................................................... ELAPSED TIME INDICATOR HOIST, BL−27100−71 HOIST, 42315−10 .......... Replace Elapsed Time Indicator HOIST, BL−27100−71 . ...................................... Replace Elapsed Time Indicator HOIST, 42315−10 . ........................................... FRONT AND REAR COWLINGS HOIST, BL−27100−71 HOIST, 42315−10 ..... Replace Front and Rear Cowlings HOIST, BL−27100−71 . ................................... Replace Front and Rear Cowlings HOIST, 42315−10 . ........................................ CONTROL VALVE HOIST, BL−27100−71 .......................................................... Replace Control Valve......................................................................................... ELECTRICAL VALVE CONTROL HOIST, BL−27100−71 ................................ Replace Electrical Valve Control. ....................................................................... ELECTRONIC CONTROL BOX HOIST, 42315−10 .......................................... Replace Electronic Control Box.......................................................................... HOIST VALVE MODULE ASSEMBLY HOIST, 42315−10 ............................. Replace Hoist Valve Module Assembly. ............................................................ HOOK HOUSING LIMIT SWITCHES HOIST, BL−27100−71 ........................... Replace Hook Housing Limit Switches. ............................................................. HYDRAULIC CONTROL ASSEMBLY HOIST, BL−27100−71 ......................... Replace Hydraulic Control Assembly. ................................................................ RESCUE HOIST FAN HOIST, 42315−10 .......................................................... Replace Rescue Hoist Fan. .................................................................................. SHAFT HOUSING LIMIT SWITCHES HOIST, BL−27100−71 ..........................

Change 10

14-4-1 14-4-1-1 14-4-1-2 14-4-1-12 14-4-2-1 14-4-2-1 14-4-2-5 14-4-3-1 14-4-3-1 14-4-3-1 14-4-4-1 14-4-4-2 14-4-4-6 14-4-5-1 14-4-5-1 14-4-5-4 14-4-6-1 14-4-6-1 14-4-6-3 14-4-7-1 14-4-7-1 14-4-7-4 14-4-8-1 14-4-8-1 14-4-8-2 14-4-9-1 14-4-9-1 14-4-9-1 14-4-10-1 14-4-10-1 14-4-11-1 14-4-11-1 14-4-12-1 14-4-12-1 14-4-13-1 14-4-13-1 14-4-14-1 14-4-14-1 14-4-15-1 14-4-15-1 14-4-16-1 14-4-16-1 14-4-17-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 14-4-17.1 14-4-18 14-4-18.1 14-4-19 14-4-19.1 14-4-20 14-4-20.1 14-4-21 14-4-21.1 14-4-21.2 14-4-22 14-4-22.1 14-4-23 14-4-23.1 14-4-23.2 14-4-24 14-4-24.1 14-4-24.2 14-4-25 14-4-25.1 14-4-26 14-4-26.1 14-4-27 14-4-27.1 14-4-28 14-4-28.1 14-4-29 14-4-29.1 14-4-30 14-4-30.1 14-4-31 14-4-31.1 14-4-32 14-4-32.1 14-4-33 14-4-33.1 14-4-34 14-4-34.1 14-4-35 14-4-35.1

Replace Shaft Housing Limit Switches............................................................... SOLENOID VALVE HOIST, BL−27100−71 ......................................................... Replace Solenoid Valve....................................................................................... SUPPORT ASSEMBLY HOIST, 42315−10 ....................................................... Replace Support Assembly.................................................................................. RESCUE HOIST FAIRINGS.............................................................................. Replace Rescue Hoist Fairings............................................................................ RESCUE HOIST/CARGO HOOK PENDANT HOIST, BL−27100−71 HOIST, 42315−10 ................................................................................................... Replace Rescue Hoist/Cargo Hook Pendant HOIST, BL−27100−71 ..................... Replace Rescue Hoist/Cargo Hook Pendant HOIST, 42315−10 .......................... WIRING HARNESS HOIST, BL−27100−71 HOIST, 42315−10 ............................ Replace Wiring Harness. ..................................................................................... RESCUE HOIST LIGHT ASSEMBLY HOIST, BL−27100−71 HOIST, 42315−10 ................................................................................................... Replace Rescue Hoist Light Assembly HOIST, BL−27100−71 ............................. Replace Rescue Hoist Light Assembly HOIST, 42315−10 .................................. RESCUE HOIST LIGHT LAMP HOIST, BL−27100−71 HOIST, 42315−10 ........ Replace Rescue Hoist Light Lamp HOIST, BL−27100−71 . .................................. Replace Rescue Hoist Light Lamp HOIST, 42315−10 . ....................................... AUX RESCUE HOIST CONTROL PANEL HOIST, BL−27100−71 HOIST, 42315−10 ................................................................................................... Replace Aux Rescue Hoist Control Panel. ......................................................... BACKUP CONTROL PANEL HOIST, BL−27100−71 ......................................... Replace Backup Control Panel............................................................................ RESCUE HOIST CONTROL BOX HOIST, 42315−10 ..................................... Replace Rescue Hoist Control Box..................................................................... SWITCH GUARD COVER HOIST, BL−27100−71 .............................................. Replace Switch Guard Cover. ............................................................................. INDICATOR AND BACKUP CONTROL POWER LAMPS HOIST, BL−27100−71 .............................................................................................. Replace Indicator and Backup Control Power Lamps. ...................................... BACKUP CONTROL PANEL INFORMATION PLATE HOIST, BL−27100−71 .............................................................................................. Replace Backup Control Panel Information Plate. ............................................. AUXILIARY HOIST RELAY PANEL HOIST, BL−27100−71 ............................ Replace Auxiliary Hoist Relay Panel.................................................................. RESCUE HOIST HOIST BL−29900−30 .............................................................. Replace Rescue Hoist. ......................................................................................... LOAD CABLE HOIST BL−29900−30 ................................................................. Replace Load Cable. ............................................................................................ HOOK ASSEMBLY HOIST BL−29900−30 ........................................................ Replace Hook Assembly...................................................................................... CABLE CUTTER AND ANVIL HOIST BL−29900−30 ..................................... Replace Cable Cutter and Anvil..........................................................................

Change 10

14-4-17-1 14-4-18-1 14-4-18-1 14-4-19-1 14-4-19-1 14-4-20-1 14-4-20-1 14-4-21-1 14-4-21-1 14-4-21-3 14-4-22-1 14-4-22-1 14-4-23-1 14-4-23-1 14-4-23-2 14-4-24-1 14-4-24-1 14-4-24-1 14-4-25-1 14-4-25-1 14-4-26-1 14-4-26-1 14-4-27-1 14-4-27-1 14-4-28-1 14-4-28-1 14-4-29-1 14-4-29-1 14-4-30-1 14-4-30-1 14-4-31-1 14-4-31-1 14-4-32-1 14-4-32-2 14-4-33-1 14-4-33-1 14-4-34-1 14-4-34-1 14-4-35-1 14-4-35-1

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TABLE OF CONTENTS (Cont)

Page 14-4-36 14-4-36.1 14-4-37 14-4-37.1 14-4-38 14-4-38.1 14-4-38.2 14-4-39 14-4-39.1 14-4-39.2 14-4-40 14-4-40.1 14-4-41 14-4-41.1

RESCUE HOIST PENDANT HOIST BL−29900−30 .......................................... Replace Rescue Hoist Pendant. ........................................................................... SUPPORT FAIRINGS AND COWLINGS HOIST BL−29900−30 ..................... Replace Support Fairings and Cowlings. ............................................................ PILOT’S HOIST CONTROL PANEL HOIST BL−29900−30 ............................ Replace Pilot’s Hoist Control Panel.................................................................... Replace Pilot’s Hoist Control Panel Information Plate...................................... CREW HOIST CONTROL PANEL HOIST BL−29900−30 ............................... Replace Crew Hoist Control Panel. .................................................................... Replace Crew Hoist Control Panel Information Plate........................................ LIMIT SWITCH HOIST BL−29900−30 ............................................................... Set/Check Limit Switch. ...................................................................................... EXPLOSIVE CARTRIDGE HOIST BL−29900−30 ............................................ Replace Explosive Cartridge. ..............................................................................

14-4-36-1 14-4-36-1 14-4-37-1 14-4-37-1 14-4-38-1 14-4-38-1 14-4-38-1 14-4-39-1 14-4-39-1 14-4-39-3 14-4-40-1 14-4-40-1 14-4-41-1 14-4-41-1

Section 14-5 14-5-1 14-5-1.1 14-5-2 14-5-2.1

MAINTENANCE PROCEDURES (BENCH).................................................... BASE SUPPORT BUSHINGS (BENCH). ........................................................ Replace Base Support Bushings (BENCH). ....................................................... SUPPORT ARM BUSHINGS (BENCH). ......................................................... Replace Support Arm Bushings (BENCH).........................................................

14-5-1 14-5-1-1 14-5-1-1 14-5-2-1 14-5-2-1

CHAPTER 15

AUXILIARY POWER PLANT SYSTEM ........................................................

15-1

Section 15-1 15-1-1 15-1-1.1 15-1-1.2 15-1-2 15-1-2.1 15-1-2.2 15-1-2.3

EQUIPMENT DESCRIPTION AND DATA ..................................................... AUXILIARY POWER UNIT SYSTEM DESCRIPTION AND DATA........... Auxiliary Power Unit System Description.......................................................... Auxiliary Power Unit System Operation. ........................................................... AUXILIARY POWER UNIT SYSTEM WITH 5 BIT DESU.......................... System Description. ............................................................................................. Principles Of Operation. ...................................................................................... Mechanical Description. ......................................................................................

15-1-1 15-1-1-1 15-1-1-1 15-1-1-1 15-1-2-1 15-1-2-1 15-1-2-1 15-1-2-4

Section 15-2 15-2-1 15-2-2 15-2-3

TROUBLESHOOTING ....................................................................................... AUXILIARY POWER UNIT SYSTEM USING TEST SET H296A............... AUXILIARY POWER UNIT SYSTEM USING TEST SET H296B-1. .......... AUXILIARY POWER UNIT SYSTEM WITH 5 BIT DESU..........................

15-2-1 15-2-1-1 15-2-2-1 15-2-3-1

Section 15-3

ON AIRCRAFT INSPECTIONS - NOT APPLICABLE...................................

15-3-1

Section 15-4 15-4-1 15-4-1.1 15-4-2 15-4-2.1

MAINTENANCE PROCEDURES ..................................................................... AUXILIARY POWER UNIT (APU).................................................................. Replace APU........................................................................................................ APU EXHAUST DUCT...................................................................................... Replace APU Exhaust Duct.................................................................................

15-4-1 15-4-1-1 15-4-1-2 15-4-2-1 15-4-2-1

V7-xii

Change 10

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TABLE OF CONTENTS (Cont)

Page 15-4-3 15-4-3.1 15-4-4 15-4-4.1 15-4-5 15-4-5.1 15-4-6 15-4-6.1 15-4-7 15-4-7.1 15-4-8 15-4-8.1 15-4-9 15-4-9.1 15-4-10 15-4-10.1 15-4-11 15-4-11.1 15-4-12 15-4-12.1 15-4-13 15-4-13.1 15-4-14 15-4-14.1 15-4-15

15-4-3-1 15-4-3-1 15-4-4-1 15-4-4-1 15-4-5-1 15-4-5-1 15-4-6-1 15-4-6-1 15-4-7-1 15-4-7-1 15-4-8-1 15-4-8-1 15-4-9-1 15-4-9-1 15-4-10-1 15-4-10-1 15-4-11-1 15-4-11-1 15-4-12-1 15-4-12-1 15-4-13-1 15-4-13-1 15-4-14-1 15-4-14-1

15-4-15.1 15-4-16 15-4-16.1 15-4-16.2

APU EXHAUST PIPE......................................................................................... Replace APU Exhaust Pipe. ................................................................................ APU SHROUD ASSEMBLY.............................................................................. Replace APU Shroud Assembly.......................................................................... APU FRONT MOUNTING LUGS..................................................................... Replace APU Front Mounting Lugs. .................................................................. APU REAR MOUNTING LUG. ........................................................................ Replace APU Rear Mounting Lug. ..................................................................... APU STARTER MOTOR. .................................................................................. Replace APU Starter Motor................................................................................. APU SPLINE ADAPTER. .................................................................................. Replace APU Spline Adapter. ............................................................................. PRIME APU FUEL INLET HOSE..................................................................... Prime APU Fuel Inlet Hose................................................................................. APU FUEL SHUTOFF VALVE......................................................................... Replace APU Fuel Shutoff Valve. ...................................................................... APU FUEL INLET HOSE. ................................................................................. Replace APU Fuel Inlet Hose. ............................................................................ APU DRAIN LINES. .......................................................................................... Replace APU Drain Lines. .................................................................................. APU FRONT INBOARD SUPPORT MOUNT. ................................................ Replace APU Front Inboard Support Mount. ..................................................... APU FRONT OUTBOARD SUPPORT MOUNT. ............................................ Replace APU Front Outboard Support Mount. .................................................. APU FRONT INBOARD AND OUTBOARD SUPPORT MOUNT REPAIR................................................................................................................ Repair APU Front Inboard and Outboard Support Mounts. .............................. APU REAR SUPPORT MOUNT. ...................................................................... Replace APU Rear Support Mount. .................................................................... Repair APU Rear Support Mount. ......................................................................

Section 15-5

MAINTENANCE PROCEDURES (BENCH) - NOT APPLICABLE ..............

15-5-1

Change 10

15-4-15-1 15-4-15-1 15-4-16-1 15-4-16-1 15-4-16-3

V7-xiii/(V7-xiv Blank)

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

VOLUME

8

TABLE OF CONTENTS Page CHAPTER 16

MISSION EQUIPMENT .....................................................................................

16-1

Section 16-1 16-1-1 16-1-1.1 16-1-1.2 16-1-2 16-1-2.1 16-1-3 16-1-3.1 16-1-4

EQUIPMENT DESCRIPTION AND DATA ..................................................... SIX MAN LITTER KIT DESCRIPTION AND DATA. ................................... System Description. ............................................................................................. Cabin Installation. ................................................................................................ M-60D MACHINE GUN MOUNTS DESCRIPTION AND DATA. ............... System Description. ............................................................................................. BLACKOUT DEVICES KIT DESCRIPTION AND DATA. ........................... System Description. ............................................................................................. EXTERNAL STORES SUPPORT SYSTEM RANGE EXTENSION SYSTEM DESCRIPTION AND DATA............................................................. System Description. ............................................................................................. Principles Of Operation. ...................................................................................... Component Description. ...................................................................................... EXTERNAL STORES SUPPORT SYSTEM WITH FUEL GAUGING DESCRIPTION AND DATA.............................................................................. System Description. ............................................................................................. Principles Of Operation. ...................................................................................... Component Description. ...................................................................................... EXTERNAL STORES SUPPORT SYSTEM JETTISON SYSTEM DESCRIPTION AND DATA.............................................................................. External Stores Support System (ESSS) Jettison System Description. ............. ESSS Jettison System Power Distribution. ......................................................... Stores Jettison Control Panel............................................................................... Primary Jettison Subsystem. ................................................................................ ESSS Emergency Jettison Subsystem. ................................................................ MAIN AND TAIL ROTOR BLADE EROSION PROTECTION KIT DESCRIPTION AND DATA.............................................................................. System Description. .............................................................................................

16-1-1 16-1-1-1 16-1-1-1 16-1-1-1 16-1-2-1 16-1-2-1 16-1-3-1 16-1-3-1

16-1-4.1 16-1-4.2 16-1-4.3 16-1-5 16-1-5.1 16-1-5.2 16-1-5.3 16-1-6 16-1-6.1 16-1-6.2 16-1-6.3 16-1-6.4 16-1-6.5 16-1-7 16-1-7.1 Section 16-2 16-2-1 16-2-2 16-2-3 16-2-4 16-2-5

TROUBLESHOOTING ....................................................................................... EXTERNAL STORES SUPPORT SYSTEM RANGE EXTENSION SYSTEM. ............................................................................................................. EXTERNAL STORES SUPPORT SYSTEM WITH FUEL GAUGING.......... EXTERNAL STORES SUPPORT SYSTEM RANGE EXTENSION EXTERNAL TANK CHECK.............................................................................. EXTERNAL STORES SUPPORT SYSTEM JETTISON SYSTEM. ............... STORES JETTISON CONTROL PANEL (BENCH)........................................

16-1-4-1 16-1-4-1 16-1-4-1 16-1-4-2 16-1-5-1 16-1-5-1 16-1-5-1 16-1-5-2 16-1-6-1 16-1-6-1 16-1-6-1 16-1-6-1 16-1-6-1 16-1-6-1 16-1-7-1 16-1-7-1 16-2-1 16-2-1-1 16-2-2-1 16-2-3-1 16-2-4-1 16-2-5-1

Change 10 This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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TABLE OF CONTENTS (Cont)

Page 16-2-6

AIR TRANSPORT HYDRAULIC CART..........................................................

16-2-6-1

Section 16-3 16-3-1 16-3-1.1 16-3-1.2 16-3-1.3 16-3-2 16-3-2.1 16-3-2.2 16-3-2.3 16-3-3 16-3-3.1 16-3-3.2

ON AIRCRAFT INSPECTIONS ........................................................................ EXTERNAL STORES SUPPORT SYSTEM (ESSS) INSPECTIONS............. Fuel Hose Inspection. .......................................................................................... Pneumatic Hose Inspection.................................................................................. Expandable Pin and Bolt Inspection. .................................................................. MAIN ROTOR BLADE EROSION PROTECTION KIT INSPECTIONS. ..... Main Rotor Blade Polyurethane Tape Inspection............................................... Main Rotor Blade Tip Cap Polyurethane Coating Inspection. .......................... Main Rotor Blade Tip Cap Polyurethane Boot Inspection. ............................... TAIL ROTOR BLADE EROSION PROTECTION KIT INSPECTIONS........ Tail Rotor Blade Polyurethane Tape Inspection................................................. Tail Rotor Blade Tip Cap Polyurethane Coating Inspection. ............................

16-3-1 16-3-1-1 16-3-1-1 16-3-1-1 16-3-1-1 16-3-2-1 16-3-2-1 16-3-2-2 16-3-2-2 16-3-3-1 16-3-3-1 16-3-3-1

Section 16-4 16-4-1 16-4-1.1 16-4-2 16-4-2.1 16-4-3 16-4-3.1 16-4-4 16-4-4.1 16-4-5 16-4-5.1 16-4-6 16-4-6.1 16-4-7 16-4-7.1 16-4-8 16-4-8.1 16-4-9

MAINTENANCE PROCEDURES ..................................................................... M-60D MACHINE GUN MOUNT. ................................................................... Replace M-60D Machine Gun Mount................................................................. M-60D MACHINE GUN MOUNT DETENT SPRING.................................... Replace M-60D Machine Gun Mount Detent Spring......................................... M-60D MACHINE GUN MOUNT PINTLE. .................................................... Replace M-60D Machine Gun Mount Pintle...................................................... M-60D MACHINE GUN MOUNT OUTBOARD FITTING............................ Replace M-60D Machine Gun Mount Outboard Fitting. ................................... CREW CHIEF’S COMMUNICATION CORD. ................................................ Replace Crew Chief’s Communication Cord...................................................... BLACKOUT CURTAINS. .................................................................................. Repair Blackout Curtain and Hook Fastener Tape............................................. AIR TRANSPORT HYDRAULIC CART CONTROL PENDANT. ................ Replace/Repair Air Transport Hydraulic Cart Control Pendant......................... AIR TRANSPORT HYDRAULIC CART CONTROL BOX............................ Repair Air Transport Hydraulic Cart Control Box............................................. AIR TRANSPORT HYDRAULIC CART PUMP AND MOTOR ASSEMBLY.............................................................................................................. Replace Air Transport Hydraulic Cart Pump and Motor Assembly.................. AIR TRANSPORT HYDRAULIC CART FILTER ELEMENT....................... Replace Air Transport Hydraulic Cart Filter Element. ...................................... AIR TRANSPORT HYDRAULIC CART FILTER ASSEMBLY. ................... Replace Air Transport Hydraulic Cart Filter Assembly..................................... AIR TRANSPORT HYDRAULIC CART PRESSURE SWITCH.................... Replace Air Transport Hydraulic Cart Pressure Switch..................................... AIR TRANSPORT HYDRAULIC CART DIRECTIONAL CONTROL VALVE/SPECIAL MANIFOLD......................................................................... Replace Air Transport Hydraulic Cart Directional Control Valve/Special Manifold. ..............................................................................................................

16-4-1 16-4-1-1 16-4-1-1 16-4-2-1 16-4-2-1 16-4-3-1 16-4-3-1 16-4-4-1 16-4-4-1 16-4-5-1 16-4-5-1 16-4-6-1 16-4-6-1 16-4-7-1 16-4-7-1 16-4-8-1 16-4-8-1

16-4-9.1 16-4-10 16-4-10.1 16-4-11 16-4-11.1 16-4-12 16-4-12.1 16-4-13 16-4-13.1

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Change 10

16-4-9-1 16-4-9-1 16-4-10-1 16-4-10-1 16-4-11-1 16-4-11-1 16-4-12-1 16-4-12-1 16-4-13-1 16-4-13-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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TABLE OF CONTENTS (Cont)

Page 16-4-14 16-4-14.1 16-4-15 16-4-15.1 16-4-16 16-4-16.1 16-4-17 16-4-17.1 16-4-18 16-4-18.1 16-4-19 16-4-19.1 16-4-20 16-4-20.1 16-4-21 16-4-21.1 16-4-22 16-4-22.1 16-4-23 16-4-23.1 16-4-23.2 16-4-24 16-4-24.1 16-4-25 16-4-25.1 16-4-26 16-4-26.1 16-4-27 16-4-27.1 16-4-28 16-4-28.1 16-4-29

AIR TRANSPORT HYDRAULIC CART FLOW REGULATORS/NEEDLE VALVES. ............................................................................................................. Replace Air Transport Hydraulic Cart Flow Regulators/Needle Valves. .......... AIR TRANSPORT HYDRAULIC CART WHEEL. ......................................... Replace Air Transport Hydraulic Cart Wheel. ................................................... AIR TRANSPORT HYDRAULIC CART HYDRAULIC LINES. ................... Replace/Repair Air Transport Hydraulic Cart Hydraulic Lines......................... AIR TRANSPORT HYDRAULIC CART RESERVOIR. ................................. Repair Air Transport Hydraulic Cart Reservoir. ................................................ AIR TRANSPORT HYDRAULIC CART GROUNDING CABLE.................. Replace Air Transport Hydraulic Cart Grounding Cable................................... AIR TRANSPORT HYDRAULIC CART POWER CABLE............................ Replace Air Transport Hydraulic Cart Power Cable.......................................... ESSS HORIZONTAL STORES SUPPORT (HSS) STRUTS REPAIR............ Repair ESSS Horizontal Stores Support (HSS) Struts. ...................................... ESSS HORIZONTAL STORES SUPPORT (HSS) FAIRINGS........................ Replace ESSS Horizontal Stores Support (HSS) Fairings. ................................ ESSS HORIZONTAL STORES SUPPORT (HSS) FAIRINGS REPAIR. ....... Repair ESSS Horizontal Stores Support (HSS) Fairings. .................................. ESSS HORIZONTAL STORES SUPPORT (HSS) FRAMING REPAIR. ....... Repair ESSS Horizontal Stores Support (HSS) Framing. .................................. Replace ESSS Horizontal Stores Support (HSS) Beam Ground Straps and Tabs. ..................................................................................................................... ESSS HORIZONTAL STORES SUPPORT (HSS) ROOT-TO-FUSELAGE FUEL HOSE. ....................................................................................................... Replace ESSS Horizontal Stores Support (HSS) Root-to-Fuselage Fuel Hose...................................................................................................................... ESSS HORIZONTAL STORES SUPPORT (HSS) ROOT-TO-FUSELAGE PNEUMATIC HOSE. .......................................................................................... Replace ESSS Horizontal Stores Support (HSS) Root-to-Fuselage Pneumatic Hose...................................................................................................................... ESSS HORIZONTAL STORES SUPPORT (HSS) FUEL HOSES, FUEL TUBE ASSEMBLY, AND FUEL TEE UNION................................................ Replace ESSS Horizontal Stores Support (HSS) Fuel Hoses, Fuel Tube Assembly, and Fuel Tee Union. .............................................................................. ESSS HORIZONTAL STORES SUPPORT (HSS) PNEUMATIC HOSES AND PNEUMATIC CHECK VALVE. .............................................................. Replace ESSS Horizontal Stores Support (HSS) Pneumatic Hoses and Pneumatic Check Valve....................................................................................... ESSS VERTICAL SUPPORT PYLON (VSP) PNEUMATIC HOSE AND ELBOW................................................................................................................ Replace ESSS Vertical Support Pylon (VSP) Pneumatic Hose and Elbow...... ESSS VERTICAL SUPPORT PYLON (VSP) FUEL HOSE, FUEL TUBE, AND ISOLATION CHECK VALVE. ................................................................

Change 10

16-4-14-1 16-4-14-1 16-4-15-1 16-4-15-1 16-4-16-1 16-4-16-1 16-4-17-1 16-4-17-1 16-4-18-1 16-4-18-1 16-4-19-1 16-4-19-1 16-4-20-1 16-4-20-1 16-4-21-1 16-4-21-1 16-4-22-1 16-4-22-1 16-4-23-1 16-4-23-1 16-4-23-4 16-4-24-1 16-4-24-1 16-4-25-1 16-4-25-1 16-4-26-1 16-4-26-1 16-4-27-1 16-4-27-1 16-4-28-1 16-4-28-1 16-4-29-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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Page 16-4-29.1 16-4-30 16-4-30.1 16-4-31 16-4-31.1 16-4-32 16-4-32.1 16-4-33 16-4-33.1 16-4-34 16-4-34.1 16-4-35 16-4-35.1 16-4-36 16-4-36.1 16-4-37 16-4-37.1 16-4-38 16-4-38.1 16-4-39 16-4-39.1 16-4-40 16-4-40.1 16-4-41 16-4-41.1 16-4-42 16-4-42.1 16-4-43 16-4-43.1 16-4-44 16-4-44.1 16-4-45

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Replace ESSS Vertical Support Pylon (VSP) Fuel Hose, Fuel Tube, and Isolation Check Valve.......................................................................................... ESSS FLOW SENSOR PANEL. ........................................................................ Replace ESSS Flow Sensor Panel Components. ................................................ ESSS FLOW TRANSMITTER. .......................................................................... Replace ESSS Flow Transmitter. ........................................................................ ESSS HORIZONTAL STORES SUPPORT (HSS) BLEED-AIR REGULATOR VALVES, UNIONS, AND TEE FITTING. .............................................. Replace ESSS Horizontal Stores Support (HSS) Bleed-Air Regulator Valves, Unions, and Tee Fitting. ...................................................................................... ESSS HORIZONTAL STORES SUPPORT (HSS) FUEL SHUTOFF GATE VALVE. ............................................................................................................... Replace ESSS Horizontal Stores Support (HSS) Fuel Shutoff Gate Valve. ..... EJECTOR RACK, BRU-22A/A.......................................................................... Replace Ejector Rack, BRU-22A/A. ................................................................... EJECTOR RACK, BRU-22A/A, EXPLOSIVE CARTRIDGE. ........................ Replace Ejector Rack, BRU-22A/A, Explosive Cartridge. ................................ EJECTOR RACK, BRU-22A/A, REPAIR. ........................................................ Repair Ejector Rack, BRU-22A/A. ..................................................................... ESSS VERTICAL SUPPORT PYLON (VSP). .................................................. Replace ESSS Vertical Support Pylon (VSP)..................................................... ESSS AUXILIARY FUEL MANAGEMENT CONTROL PANEL W/O AUX FUEL QTY .............................................................................................. Replace ESSS Auxiliary Fuel Management Control Panel................................ ESSS AUXILIARY FUEL MANAGEMENT CONTROL PANEL INFORMATION PLATE W/O AUX FUEL QTY .................................................. Replace ESSS Auxiliary Fuel Management Control Panel Information Plate.. ESSS AUXILIARY FUEL MANAGEMENT CONTROL PANEL DIGITAL DISPLAY SEGMENT W/O AUX FUEL QTY ..................................................... Replace ESSS Auxiliary Fuel Management Control Panel Digital Display Segment. ............................................................................................................... ESSS AUXILIARY FUEL MANAGEMENT CONTROL PANEL INDICATOR LAMPS W/O AUX FUEL QTY .................................................................... Replace ESSS Auxiliary Fuel Management Control Panel Indicator Lamps.... ESSS AUXILIARY FUEL MANAGEMENT CONTROL PANEL DENSITY SWITCHES W/O AUX FUEL QTY .................................................... Adjust ESSS Auxiliary Fuel Management Control Panel Density Switches. ... ESSS CABIN FUEL HARNESS W/O AUX FUEL QTY ..................................... Replace ESSS Cabin Fuel Harness. .................................................................... ESSS HORIZONTAL STORES SUPPORT (HSS) FUEL SYSTEM REAR ELECTRICAL HARNESS. ................................................................................. Replace ESSS Horizontal Stores Support (HSS) Fuel System Rear Electrical Harness. ................................................................................................................ ESSS HORIZONTAL STORES SUPPORT (HSS) FUEL SYSTEM FRONT ELECTRICAL HARNESS. .................................................................................

Change 10

16-4-29-1 16-4-30-1 16-4-30-1 16-4-31-1 16-4-31-1 16-4-32-1 16-4-32-1 16-4-33-1 16-4-33-1 16-4-34-1 16-4-34-1 16-4-35-1 16-4-35-1 16-4-36-1 16-4-36-1 16-4-37-1 16-4-37-1 16-4-38-1 16-4-38-1 16-4-39-1 16-4-39-1 16-4-40-1 16-4-40-1 16-4-41-1 16-4-41-1 16-4-42-1 16-4-42-1 16-4-43-1 16-4-43-1 16-4-44-1 16-4-44-1 16-4-45-1

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TABLE OF CONTENTS (Cont)

Page 16-4-45.1 16-4-46 16-4-46.1 16-4-47 16-4-47.1 16-4-48 16-4-48.1 16-4-49 16-4-49.1 16-4-50 16-4-50.1 16-4-51 16-4-51.1 16-4-52 16-4-52.1 16-4-53 16-4-53.1 16-4-54 16-4-54.1 16-4-55 16-4-55.1 16-4-55.2 16-4-56 16-4-56.1 16-4-57 16-4-57.1 16-4-58 16-4-58.1 16-4-59 16-4-59.1 16-4-60 16-4-60.1 16-4-61 16-4-61.1 16-4-62 16-4-62.1 16-4-63 16-4-63.1 16-4-64

Replace ESSS Horizontal Stores Support (HSS) Fuel System Front Electrical Harness. .......................................................................................................... ESSS HORIZONTAL STORES SUPPORT (HSS) POSITION LIGHT HARNESS............................................................................................................ Replace ESSS Horizontal Stores Support (HSS) Position Light Harness. ........ ESSS FUEL OVERFLOW SENSOR. ................................................................ Replace ESSS Fuel Overflow Sensor.................................................................. ESSS SIGNAL CONDITIONER AUX FUEL QTY ............................................ Replace ESSS Signal Conditioner....................................................................... ESSS CONTROL DISPLAY PANEL AUX FUEL QTY .................................... Replace ESSS Control Display Panel. ................................................................ ESSS STORES JETTISON CONTROL PANEL............................................... Replace ESSS Stores Jettison Control Panel. ..................................................... ESSS STORES JETTISON CONTROL PANEL INFORMATION PLATE/ LAMPS................................................................................................................. Replace ESSS Stores Jettison Control Panel Information Plate/Lamps. ........... ESSS CABIN JETTISON HARNESS W/O AUX FUEL QTY ............................ Replace ESSS Cabin Jettison Harness. ............................................................... ESSS HORIZONTAL STORES SUPPORT (HSS) JETTISON SYSTEM HARNESS............................................................................................................ Replace ESSS Horizontal Stores Support (HSS) Jettison System Harness....... ESSS EXTERNAL 230 GALLON FUEL TANKS. .......................................... Replace ESSS External 230 Gallon Fuel Tanks................................................. ESSS EXTERNAL 230 GALLON FUEL TANK DRAIN VALVE................. Replace ESSS External 230 Gallon Fuel Tank Drain Valve. ............................ Repair ESSS External 230 Gallon Fuel Tank Drain Valve. .............................. ESSS EXTERNAL 230 GALLON FUEL TANK GROUNDING JACK......... Replace ESSS External 230 Gallon Fuel Tank Grounding Jack. ...................... ESSS EXTERNAL 230 GALLON FUEL TANK FILLER CAP...................... Replace ESSS External 230 Gallon Fuel Tank Filler Cap................................. ESSS EXTERNAL 230 GALLON FUEL TANK ELECTRICAL INTERFACE CABLE.......................................................................................... Replace ESSS External 230 Gallon Fuel Tank Electrical Interface Cable. ...... ESSS EXTERNAL 230 GALLON FUEL TANK FUEL INTERFACE. .......... Replace ESSS External 230 Gallon Fuel Tank Fuel Interface. ......................... ESSS EXTERNAL 230 GALLON FUEL TANK AIR INTERFACE. ............. Replace ESSS External 230 Gallon Fuel Tank Air Interface. ........................... ESSS EXTERNAL 230 GALLON FUEL TANK SUSPENSION LUG........... Replace ESSS External 230 Gallon Fuel Tank Suspension Lug. ...................... ESSS EXTERNAL 230 GALLON FUEL TANK STABILIZER FIN.............. Replace ESSS External 230 Gallon Fuel Tank Stabilizer Fin. .......................... ESSS EXTERNAL 230 GALLON FUEL TANK ACCESS DOORS. ............. Replace ESSS External 230 Gallon Fuel Tank Access Doors........................... ESSS EXTERNAL 230 GALLON FUEL TANK PROBES AUX FUEL QTY .....................................................................................................

16-4-45-1 16-4-46-1 16-4-46-1 16-4-47-1 16-4-47-1 16-4-48-1 16-4-48-1 16-4-49-1 16-4-49-1 16-4-50-1 16-4-50-1 16-4-51-1 16-4-51-1 16-4-52-1 16-4-52-1 16-4-53-1 16-4-53-1 16-4-54-1 16-4-54-1 16-4-55-1 16-4-55-1 16-4-55-1 16-4-56-1 16-4-56-1 16-4-57-1 16-4-57-1 16-4-58-1 16-4-58-1 16-4-59-1 16-4-59-1 16-4-60-1 16-4-60-1 16-4-61-1 16-4-61-1 16-4-62-1 16-4-62-1 16-4-63-1 16-4-63-1 16-4-64-1

Change 10

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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Page 16-4-64.1 16-4-65 16-4-65.1 16-4-66 16-4-66.1 16-4-67 16-4-67.1 16-4-68 16-4-68.1 16-4-69 16-4-69.1 16-4-70 16-4-70.1 16-4-71 16-4-71.1 16-4-71.2 16-4-71.3 16-4-71.4 16-4-71.5 16-4-71.6 16-4-71.7 16-4-71.8 16-4-71.9 16-4-71.10 16-4-71.11 16-4-71.12 16-4-71.13 16-4-71.14 16-4-71.15 16-4-71.16 16-4-72 16-4-72.1 16-4-73 16-4-73.1 16-4-74 16-4-74.1 16-4-75

V8-vi

Replace ESSS External 230 Gallon Fuel Tank Probes. ..................................... ESSS EXTERNAL 230 GALLON FUEL TANK FUEL QUANTITY SENSOR HARNESS W/O AUX FUEL QTY ................................................................ Replace ESSS External 230 Gallon Fuel Tank Fuel Quantity Sensor Harness. ...................................................................................................................... ESSS EXTERNAL 230 GALLON FUEL TANK PROBE WIRING HARNESS AUX FUEL QTY ........................................................................................ Replace ESSS External 230 Gallon Fuel Tank Probe Wiring Harness............. ESSS EXTERNAL 230 GALLON FUEL TANK FUEL VALVE. .................. Replace ESSS External 230 Gallon Fuel Tank Fuel Valve. .............................. ESSS EXTERNAL 230 GALLON FUEL TANK FUEL SUPPLY TUBE. ..... Replace ESSS External 230 Gallon Fuel Tank Fuel Supply Tube.................... ESSS EXTERNAL 230 GALLON FUEL TANK INLET AIR TUBE............. Replace ESSS External 230 Gallon Fuel Tank Inlet Air Tube. ........................ ESSS EXTERNAL 230 GALLON FUEL TANK PRESSURE TEST.............. ESSS External 230 Gallon Fuel Tank Pressure Test. ........................................ ESSS EXTERNAL 230 GALLON FUEL TANK - REPAIR. .......................... General. ................................................................................................................ Vacuum Bag Procedure. ...................................................................................... Adhesive Systems. ............................................................................................... Types of Damage. ................................................................................................ Classes of Damage............................................................................................... Class I Repair....................................................................................................... Class II Repair. .................................................................................................... Class III Repair. ................................................................................................... Class IV Repair.................................................................................................... Class V Repair. .................................................................................................... Class VI Repair.................................................................................................... Class VI-A Repair. ............................................................................................. Class VII Repair................................................................................................... Class VII-A Repair. ............................................................................................. Class VIII Repair. ................................................................................................ Repair Bullet Hole. .............................................................................................. APU ENGINE AIR PARTICLE SEPARATOR (EAPS) AIR PARTICLE SEPARATOR....................................................................................................... Replace APU Engine Air Particle Separator (EAPS) Air Particle Separator.... APU ENGINE AIR PARTICLE SEPARATOR (EAPS) COLLECTOR BOX...................................................................................................................... Replace APU Engine Air Particle Separator (EAPS) Collector Box. ............... APU ENGINE AIR PARTICLE SEPARATOR (EAPS) SCAVENGE EXHAUST DUCT. .............................................................................................. Replace APU Engine Air Particle Separator (EAPS) Scavenge Exhaust Duct. ..................................................................................................................... APU ENGINE AIR PARTICLE SEPARATOR (EAPS) EJECTOR SUPPORT BRACKETS..............................................................................................

Change 10

16-4-64-1 16-4-65-1 16-4-65-1 16-4-66-1 16-4-66-1 16-4-67-1 16-4-67-1 16-4-68-1 16-4-68-1 16-4-69-1 16-4-69-1 16-4-70-1 16-4-70-1 16-4-71-1 16-4-71-2 16-4-71-3 16-4-71-3 16-4-71-4 16-4-71-4 16-4-71-5 16-4-71-6 16-4-71-6 16-4-71-8 16-4-71-10 16-4-71-12 16-4-71-15 16-4-71-18 16-4-71-20 16-4-71-22 16-4-71-22 16-4-72-1 16-4-72-1 16-4-73-1 16-4-73-1 16-4-74-1 16-4-74-1 16-4-75-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page 16-4-75.1

Section 16-5 16-5-1 16-5-1.1 16-5-2 16-5-2.1 16-5-3 16-5-3.1 16-5-4 16-5-4.1 16-5-5 16-5-5.1 16-5-6 16-5-6.1 16-5-7 16-5-7.1 16-5-8 16-5-8.1 Section 16-6 16-6-1 16-6-1.1 16-6-2 16-6-2.1 16-6-3 16-6-3.1 16-6-4 16-6-4.1 16-6-5 16-6-5.1 16-6-6 16-6-6.1 16-6-7 16-6-7.1

Replace APU Engine Air Particle Separator (EAPS) Ejector Support Brackets. ............................................................................................................... MAINTENANCE PROCEDURES (BENCH).................................................... ESSS STORES JETTISON CONTROL PANEL ROTARY SELECTOR SWITCH (BENCH). ............................................................................................ Replace ESSS Stores Jettison Control Panel Rotary Selector Switch (BENCH).............................................................................................................. ESSS STORES JETTISON CONTROL PANEL TOGGLE SWITCHES (BENCH).............................................................................................................. Replace ESSS Stores Jettison Control Panel Toggle Switches (BENCH). ....... ESSS STORES JETTISON CONTROL PANEL RELAYS (BENCH). ........... Replace ESSS Stores Jettison Control Panel Relays (BENCH). ....................... ESSS STORES JETTISON CONTROL PANEL DIODES (BENCH). ............ Replace ESSS Stores Jettison Control Panel Diodes (BENCH)........................ ESSS STORES JETTISON CONTROL PANEL ELECTRICAL CONNECTORS (BENCH). ................................................................................................. Replace ESSS Stores Jettison Control Panel Electrical Connectors (BENCH).............................................................................................................. EJECTOR RACK, BRU-22A/A, CLEANING AND SURFACE TREATMENT (BENCH). ................................................................................................ Ejector Rack, BRU-22A/A, Cleaning and Surface Treatment (BENCH). ........ EJECTOR RACK, BRU-22A/A, WIRING HARNESS (BENCH). .................. Repair Ejector Rack, BRU-22A/A, Wiring Harness (BENCH)......................... EJECTOR RACK, BRU-22A/A, TEST (BENCH). ........................................... Ejector Rack, BRU-22A/A, Test (BENCH). ...................................................... MISSION KIT INSTALLATION AND REMOVAL PROCEDURES............. WINTERIZATION KIT INSTALLATION........................................................ Install Winterization Kit. ..................................................................................... WINTERIZATION KIT REMOVAL. ................................................................ Remove Winterization Kit. .................................................................................. COCKPIT/CABIN BLACKOUT KIT INSTALLATION.................................. Install Cockpit/Cabin Blackout Curtain. ............................................................. COCKPIT/CABIN BLACKOUT KIT REMOVAL. .......................................... Remove Cockpit/Cabin Blackout Curtain. .......................................................... CREW CHIEF’S AND CABIN DOOR WINDOWS BLACKOUT KIT INSTALLATION. ................................................................................................ Install Window Blackout Curtain........................................................................ CREW CHIEF’S AND CABIN DOOR WINDOWS BLACKOUT KIT REMOVAL. ......................................................................................................... Remove Window Blackout Curtain..................................................................... EXTERNAL STORES SUPPORT SYSTEM (ESSS) KIT INSTALLATION. ................................................................................................................... Install External Stores Support System (ESSS) Kit. ..........................................

Change 10

16-4-75-1 16-5-1 16-5-1-1 16-5-1-1 16-5-2-1 16-5-2-1 16-5-3-1 16-5-3-1 16-5-4-1 16-5-4-1 16-5-5-1 16-5-5-1 16-5-6-1 16-5-6-1 16-5-7-1 16-5-7-1 16-5-8-1 16-5-8-1 16-6-1 16-6-1-1 16-6-1-1 16-6-2-1 16-6-2-1 16-6-3-1 16-6-3-1 16-6-4-1 16-6-4-1 16-6-5-1 16-6-5-1 16-6-6-1 16-6-6-1 16-6-7-1 16-6-7-2

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TABLE OF CONTENTS (Cont)

Page 16-6-8 16-6-8.1 16-6-9 16-6-9.1 16-6-10 16-6-10.1 16-6-11 16-6-11.1 16-6-12 16-6-12.1 16-6-13 16-6-13.1 16-6-14 16-6-14.1 16-6-15 16-6-15.1 16-6-16 16-6-16.1 16-6-17 16-6-17.1 16-6-18 16-6-18.1 16-6-19 16-6-19.1 16-6-20 16-6-20.1 16-6-21 16-6-21.1 16-6-22 16-6-22.1

V8-viii

EXTERNAL STORES SUPPORT SYSTEM (ESSS) KIT REMOVAL........... Remove External Stores Support System (ESSS) Kit........................................ MAIN ROTOR BLADE TIP CAP EROSION PROTECTION KIT POLYURETHANE TAPE INSTALLATION. ................................................... Apply Polyurethane Tape. ................................................................................... MAIN ROTOR BLADE TIP CAP EROSION PROTECTION KIT POLYURETHANE TAPE REMOVE/REPAIR. ................................................ Remove/Repair Polyurethane Tape. .................................................................... MAIN ROTOR BLADE TIP CAP EROSION PROTECTION KIT POLYURETHANE COATING INSTALLATION. ........................................... Apply Polyurethane Coating................................................................................ MAIN ROTOR BLADE TIP CAP EROSION PROTECTION KIT POLYURETHANE COATING REMOVE/REPAIR. ........................................ Remove/Repair Polyurethane Coating................................................................. MAIN ROTOR BLADE TIP CAP EROSION PROTECTION KIT BOOTTO-TIP CAP INSTALLATION.......................................................................... Install Boot-to-Tip Cap........................................................................................ MAIN ROTOR BLADE TIP CAP EROSION PROTECTION KIT BOOTTO-TIP CAP REMOVE/REPAIR....................................................................... Remove/Repair Boot-to-Tip Cap......................................................................... TAIL ROTOR BLADE EROSION PROTECTION KIT POLYURETHANE TAPE INSTALLATION...................................................................................... Apply Polyurethane Tape. ................................................................................... TAIL ROTOR BLADE EROSION PROTECTION KIT POLYURETHANE TAPE REMOVE/REPAIR. ................................................................................. Remove Polyurethane Tape. ................................................................................ TAIL ROTOR BLADE TIP CAP EROSION PROTECTION KIT POLYURETHANE COATING INSTALLATION. ........................................... Apply Polyurethane Coating................................................................................ TAIL ROTOR BLADE TIP CAP EROSION PROTECTION KIT POLYURETHANE COATING REMOVE/REPAIR. ........................................ Remove/Repair Polyurethane Coating................................................................. APU ENGINE AIR PARTICLE SEPARATOR (EAPS) KIT INSTALLATION. ................................................................................................................... Install APU Engine Air Particle Separator (EAPS) Kit. .................................... APU ENGINE AIR PARTICLE SEPARATOR (EAPS) KIT REMOVAL...... Remove APU Engine Air Particle Separator (EAPS) Kit.................................. LITTER KIT INSTALLATION.......................................................................... Install Litter Kit. .................................................................................................. LITTER KIT REMOVAL. .................................................................................. Remove Litter Kit. ...............................................................................................

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16-6-8-1 16-6-8-2 16-6-9-1 16-6-9-2 16-6-10-1 16-6-10-1 16-6-11-1 16-6-11-1 16-6-12-1 16-6-12-1 16-6-13-1 16-6-13-1 16-6-14-1 16-6-14-1 16-6-15-1 16-6-15-1 16-6-16-1 16-6-16-1 16-6-17-1 16-6-17-1 16-6-18-1 16-6-18-1 16-6-19-1 16-6-19-2 16-6-20-1 16-6-20-1 16-6-21-1 16-6-21-1 16-6-22-1 16-6-22-1

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

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TABLE OF CONTENTS Page CHAPTER 17

EMERGENCY EQUIPMENT.............................................................................

17-1

Section 17-1 17-1-1 17-1-1.1 17-1-2 17-1-2.1

EQUIPMENT DESCRIPTION AND DATA ..................................................... COCKPIT EMERGENCY EQUIPMENT DESCRIPTION AND DATA......... Cockpit Emergency Equipment. .......................................................................... CABIN EMERGENCY EQUIPMENT DESCRIPTION AND DATA. ............ Cabin Emergency Equipment. .............................................................................

17-1-1 17-1-1-1 17-1-1-1 17-1-2-1 17-1-2-1

Section 17-2

TROUBLESHOOTING - NOT APPLICABLE .................................................

17-2-1

Section 17-3

ON AIRCRAFT INSPECTIONS - NOT APPLICABLE...................................

17-3-1

Section 17-4 17-4-1 17-4-1.1 17-4-1.2 17-4-2 17-4-2.1 17-4-2.2 17-4-2.3

MAINTENANCE PROCEDURES .................................................................... COCKPIT EMERGENCY EQUIPMENT. ......................................................... Replace Fire Extinguisher.................................................................................... Replace First Aid Kit........................................................................................... CABIN EMERGENCY EQUIPMENT. .............................................................. Replace Fire Extinguisher.................................................................................... Replace First Aid Kit........................................................................................... Replace Crash Ax. ...............................................................................................

17-4-1 17-4-1-1 17-4-1-1 17-4-1-1 17-4-2-1 17-4-2-1 17-4-2-1 17-4-2-1

Section 17-5

MAINTENANCE PROCEDURES (BENCH) - NOT APPLICABLE ..............

17-5-1

CHAPTER 18

GROUND SUPPORT EQUIPMENT..................................................................

18-1

Section 18-1 18-1-1 18-1-1.1 18-1-1.2

EQUIPMENT DESCRIPTION AND DATA ..................................................... GROUND SUPPORT EQUIPMENT DESCRIPTION AND DATA................ Component Handling Adapter Kit....................................................................... Fuel Quantity System Harness Adapter. .............................................................

18-1-1 18-1-1-1 18-1-1-1 18-1-1-1

Section 18-2

TROUBLESHOOTING - NOT APPLICABLE .................................................

18-2-1

Section 18-3

ON AIRCRAFT INSPECTIONS - NOT APPLICABLE...................................

18-3-1

Section 18-4 18-4-1 18-4-1.1 18-4-1.2

MAINTENANCE PROCEDURES ..................................................................... CABIN MAINTENANCE CRANE. ................................................................... Erect Cabin Maintenance Crane.......................................................................... Inspect/Repair Cabin Maintenance Crane. ..........................................................

18-4-1 18-4-1-1 18-4-1-1 18-4-1-7

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TABLE OF CONTENTS (Cont)

Page 18-4-2 18-4-2.1 18-4-3 18-4-3.1 18-4-4 18-4-4.1

TAIL MAINTENANCE CRANE. ...................................................................... Install Tail Maintenance Crane. .......................................................................... MAINTENANCE LIGHT. .................................................................................. Replace Maintenance Light. ................................................................................ BUDDY START SYSTEM HOSE. .................................................................... Repair Buddy Start System Hose........................................................................

18-4-2-1 18-4-2-1 18-4-3-1 18-4-3-1 18-4-4-1 18-4-4-1

Section 18-5 18-5-1 18-5-1.1

MAINTENANCE PROCEDURES (BENCH).................................................... CABIN MAINTENANCE CRANE (BENCH)................................................... Repair Cabin Maintenance Crane Gear Box (BENCH). ....................................

18-5-1 18-5-1-1 18-5-1-1

APPENDIX A A-1 A-2

REFERENCES ..................................................................................................... SPECIFICATIONS AND STANDARDS. .......................................................... TECHNICAL MANUALS. .................................................................................

A-1 A-1 A-8

APPENDIX B B-1 B-2 B-3 B-3.1 B-3.2 B-3.3 B-4 B-4.1 B-4.2 B-5 B-6 B-6.1 B-6.2 B-6.3 B-6.4 B-6.5 B-6.6 B-6.7

METRIC CONVERSION CHARTS................................................................... SCOPE.................................................................................................................. DESCRIPTION. ................................................................................................... RULES FOR CONVERSION AND ROUNDING............................................. Quantity. ............................................................................................................... Precision. .............................................................................................................. Decimal. ............................................................................................................... NUMBER GROUPING. ...................................................................................... Digits. ................................................................................................................... Grouping............................................................................................................... CONVERSION USING FACTORS. .................................................................. CONVERSION USING TABLES. ..................................................................... Tables. .................................................................................................................. Length................................................................................................................... Fractions. .............................................................................................................. Temperature.......................................................................................................... Weight (Mass)...................................................................................................... Torque. ................................................................................................................. Pressure. ...............................................................................................................

B-1 B-1 B-1 B-1 B-1 B-1 B-2 B-2 B-2 B-2 B-2 B-3 B-3 B-3 B-3 B-3 B-3 B-4 B-4

APPENDIX C C-1 C-1.1 C-1.2 C-1.3

SPECIAL TOOLS AND GROUND SUPPORT EQUIPMENT........................ SPECIAL TOOLS AND GROUND SUPPORT EQUIPMENT........................ Introduction. ......................................................................................................... Figure Number Index........................................................................................... Figure Alphabetical Index. ..................................................................................

C-1 C-1 C-1 C-1 C-5

APPENDIX D D-1 D-1.1

EXPENDABLE AND DURABLE ITEMS LIST............................................... SCOPE.................................................................................................................. General. ................................................................................................................

D-1 D-1 D-1

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TABLE OF CONTENTS (Cont)

Page D-1.2 D-1.3 D-1.4

Description. .......................................................................................................... Warnings Applicable to Consumable Materials. ................................................ Explanation of Columns. .....................................................................................

D-1 D-2 D-46

APPENDIX E E-1 E-1.1 E-1.2 E-1.3 E-2 E-2.1 E-2.2 E-3 E-3.1 E-3.2 E-3.3 E-3.4 E-3.5 E-3.6 E-3.7 E-3.8 E-3.9 E-3.10 E-3.11 E-3.12 E-4 E-4.1 E-4.2 E-4.3 E-4.4 E-4.5 E-4.6 E-4.7 E-4.8 E-4.9 E-4.10 E-4.11 E-4.12 E-4.13 E-4.14 E-4.15 E-4.16 E-5 E-5.1

STORAGE OF AIRCRAFT ................................................................................ INTRODUCTION AND SCOPE. ....................................................................... Introduction. ......................................................................................................... Environmental Conditions. .................................................................................. Categories of Storage........................................................................................... FLYABLE, SHORT-TERM, AND INTERMEDIATE STORAGE. ................. General Procedures. ............................................................................................. Inspection During Storage. .................................................................................. PREPARING HELICOPTER FOR FLYABLE STORAGE.............................. Inspection Before Flyable Storage. ..................................................................... Engines. ................................................................................................................ Auxiliary Power Unit........................................................................................... Hydraulic Systems. .............................................................................................. Main Rotor Head. ................................................................................................ Gear Boxes. .......................................................................................................... Fuel Tanks............................................................................................................ Electrical System.................................................................................................. Landing Gear........................................................................................................ Airframe. .............................................................................................................. Flight Controls. .................................................................................................... Inspection During Flyable Storage...................................................................... PREPARING HELICOPTER FOR SHORT-TERM STORAGE. ..................... Inspection Before Short-Term Storage................................................................ Engines. ............................................................................................................... Auxiliary Power Unit........................................................................................... Hydraulic Systems. .............................................................................................. Gear Boxes. .......................................................................................................... Main Rotor Blades. .............................................................................................. Main Rotor Head. ................................................................................................ Tail Rotor. ............................................................................................................ Fuel Tanks............................................................................................................ Electrical System.................................................................................................. Instruments. .......................................................................................................... Avionics................................................................................................................ Landing Gear........................................................................................................ Airframe. .............................................................................................................. Flight Controls. .................................................................................................... Inspection During Short-Term Storage. .............................................................. PREPARING HELICOPTER FOR INTERMEDIATE STORAGE. ................. Inspection Before Intermediate Storage. .............................................................

E-1 E-2 E-2 E-2 E-2 E-3 E-3 E-3 E-5 E-6 E-6 E-6 E-6 E-6 E-6 E-6 E-6 E-6 E-7 E-7 E-7 E-8 E-9 E-9 E-9 E-10 E-10 E-10 E-10 E-10 E-11 E-11 E-11 E-11 E-11 E-11 E-11 E-11 E-13 E-14

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TABLE OF CONTENTS (Cont)

Page E-5.2 E-5.3 E-5.4 E-5.5 E-5.6 E-5.7 E-5.8 E-5.9 E-5.10 E-5.11 E-5.12 E-5.13 E-5.14 E-5.15 E-5.16 E-5.17 E-6 E-6.1 E-6.2 E-6.3 E-6.4 E-6.5 E-6.6 E-6.7 E-6.8 E-6.9 E-6.10 E-7 E-7.1 E-7.2 E-7.3 E-7.4 E-7.5 E-7.6 E-7.7 E-7.8 E-7.9 E-7.10 E-7.11 E-7.12 E-7.13 E-7.14

V9-iv

Engines. ................................................................................................................ Auxiliary Power Unit........................................................................................... Hydraulic Systems. .............................................................................................. Gear Boxes. .......................................................................................................... Main Rotor Blades. .............................................................................................. Main Rotor Head. ................................................................................................ Tail Rotor. ............................................................................................................ Fuel Tanks. ......................................................................................................... Electrical System.................................................................................................. Instruments. .......................................................................................................... Avionics................................................................................................................ Landing Gear........................................................................................................ Utility Items. ........................................................................................................ Airframe. .............................................................................................................. Flight Controls. .................................................................................................... Inspection During Intermediate Storage.............................................................. PUTTING HELICOPTER INTO SERVICE AFTER FLYABLE STORAGE...................................................................................................................... Airframe. .............................................................................................................. Landing Gear........................................................................................................ Electrical System.................................................................................................. Fuel Tanks............................................................................................................ Gear Boxes. .......................................................................................................... Main Rotor Head. ................................................................................................ Hydraulic Systems. .............................................................................................. Engines. ................................................................................................................ Auxiliary Power Unit........................................................................................... Inspection After Activation From Flyable Storage............................................. PUTTING HELICOPTER INTO SERVICE AFTER SHORT-TERM STORAGE...................................................................................................................... Airframe. .............................................................................................................. Landing Gear........................................................................................................ Avionics................................................................................................................ Instruments. .......................................................................................................... Electrical System.................................................................................................. Fuel Tanks............................................................................................................ Tail Rotor. ............................................................................................................ Main Rotor Head. ................................................................................................ Main Rotor Blades. ............................................................................................. Gear Boxes. .......................................................................................................... Hydraulic Systems. .............................................................................................. Auxiliary Power Unit........................................................................................... Engines. ............................................................................................................... Inspection After Activation from Short-Term Storage.......................................

Change 10

E-14 E-14 E-15 E-15 E-15 E-16 E-16 E-16 E-16 E-16 E-16 E-17 E-17 E-17 E-17 E-17 E-18 E-19 E-19 E-19 E-19 E-19 E-19 E-19 E-19 E-19 E-20 E-21 E-22 E-22 E-22 E-22 E-22 E-22 E-23 E-23 E-23 E-23 E-23 E-23 E-24 E-24

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

TABLE OF CONTENTS (Cont)

Page E-8 E-8.1 E-8.2 E-8.3 E-8.4 E-8.5 E-8.6 E-8.7 E-8.8 E-8.9 E-8.10 E-8.11 E-8.12 E-8.13 E-8.14 E-8.15

PUTTING HELICOPTER INTO SERVICE AFTER INTERMEDIATE STORAGE............................................................................................................ Airframe. .............................................................................................................. Landing Gear........................................................................................................ Utility Items. ........................................................................................................ Avionics................................................................................................................ Instruments. .......................................................................................................... Electrical System.................................................................................................. Fuel Tanks............................................................................................................ Tail Rotor. ............................................................................................................ Main Rotor Head. ................................................................................................ Main Rotor Blades. .............................................................................................. Gear Boxes. .......................................................................................................... Hydraulic Systems. .............................................................................................. Auxiliary Power Unit........................................................................................... Engines. ............................................................................................................... Inspection Following Activation from Intermediate Storage. ............................

Change 10

E-25 E-26 E-26 E-26 E-26 E-26 E-26 E-27 E-27 E-27 E-27 E-27 E-27 E-27 E-28 E-28

V9-v/(V9-vi Blank)

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

VOLUME

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TABLE OF CONTENTS Page APPENDIX F F-1 F-1.1 F-1.2 F-1.3 F-1.4 F-1.5 F-1.6 F-1.7 F-1.8 F-1.9 F-1.10 F-1.11 F-1.12 F-1.13 F-1.14 F-1.15

WIRING DATA................................................................................................... GENERAL INFORMATION. ............................................................................. Scope. ................................................................................................................... Wire Identification Code...................................................................................... Circuit Designation Letters.................................................................................. Wire Type. ........................................................................................................... How To Use Wire Data List By Wire Number. ................................................ How To Use Wire Data List By Reference Designator..................................... Wire Repair. ......................................................................................................... Preservation of Electrical Connectors, Receptacles, and Plugs. ........................ External Corrosion Removal and Cleaning......................................................... Internal Corrosion Removal and Cleaning.......................................................... Water Displacement and Preservation................................................................. Coaxial Connectors. ............................................................................................. Wire Harnesses and Cables. ................................................................................ Kapton-Insulated Wiring...................................................................................... Shield Wire Identification....................................................................................

Change 10

F-1 F-2 F-2 F-2 F-2 F-3 F-3 F-3 F-4 F-5 F-5 F-5 F-5 F-6 F-6 F-6 F-7

V10-i/(V10-ii Blank)

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This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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TABLE OF CONTENTS Page APPENDIX G G-1

WEIGHT AND BALANCE ................................................................................ WEIGHT AND BALANCE ................................................................................

G-1 G-1

APPENDIX H H-1 H-1.1 H-1.2 H-1.3

ILLUSTRATED LIST OF MANUFACTURED ITEMS................................... ILLUSTRATED FIELD MANUFACTURE ITEMS LIST. .............................. Introduction. ......................................................................................................... Part Number Index............................................................................................... Alphabetical Index. ..............................................................................................

H-1 H-1 H-1 H-1 H-22

GLOSSARY .........................................................................................................

Glossary-1

INDEX..................................................................................................................

Index-1

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This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

HOW TO USE THIS MANUAL This manual includes purpose, function, physical characteristics, location, access, theory of operation, servicing, cleaning, lubrication, inspection, troubleshooting, maintenance, and repair procedures for the maintenance specialist to perform specific maintenance tasks. Wire data information for all helicopter systems and major components is also included. See the Operator’s Manual for personnel requirements and procedures for ground run and flight checking the helicopter. Procedures contained in the manuals are specific to the model S-70 helicopter. Chapter 1 of TM 1-70-23 contains eight sections. • Section 1 contains general information that pertains to the helicopter. • Section 2 contains the aircraft description and data. This includes items such as helicopter dimensions, access and inspection provisions, and steps, handholds, and walkways. The Flight Safety Part Program table is also listed here. • Section 3 contains all helicopter servicing requirements and procedures. • Section 4 contains helicopter cleaning requirements and procedures. • Section 5 contains helicopter lubrication requirements and procedures. • Section 6 contains helicopter ground handling requirements and procedures. • Section 7 contains the Periodic/Special Inspections requirements and procedures. • Sections 8 contains the Retirement Schedule. Chapters 3 through 15, 17, and 18 of TM 1-70-23 each contain 5 sections. • Section 1 contains the description and data for all systems/components applicable to that chapter. • Section 2 contains data for troubleshooting that chapter’s systems. Operational checkout procedures and logic-type troubleshooting charts

give detailed step-by-step instructions to identify malfunctioning components. Component location diagrams and schematics are also included. • Section 3 contains on-aircraft inspections that do not require the removal and/or disassembly of components. These inspections are primarily in support of the inspection requirement called out in the Preventive Maintenance Services checklist (PMS-1 and PMS-2) and the Periodic/Special Inspections called out in Section 1-7 of Chapter 1. • Section 4 contains organizational level maintenance procedures. These procedures may contain one or more of the following type of tasks: Removal/Replacement, Disassembly/Assembly, Inspections, and Repair of the components applicable to that chapter. • Section 5 contains Bench maintenance procedures. Chapters 2 and 16 of TM 1-70-23 each contain 6 sections. Sections 1 through 5 are the same as listed above for the other maintenance chapters. In chapter 2, the additional Section 6 contains helicopter structural repair requirements and procedures. In Chapter 16, the additional Section 6 contains the removal/installation procedures for the various kits which can be installed on the helicopter. This manual is one of a set of six separate manuals that cover maintenance, inspection, and troubleshooting instructions for the model S-70 helicopter. The helicopters are manufactured by Sikorsky Aircraft Corporation, 6900 Main Street, Post Office Box 9729, Stratford, Connecticut, 06614-9129. The other five manuals are: • 10 Hour/14 Day (30 Hour/42 Day) Inspection Checklist, TM 1-70-PMS-1 • Periodic Inspection Checklist, TM 1-70-PMS-2 • Aircraft Avionics Maintenance Procedures Manual, TM 11-70-23 • Airworthiness Limitations Manual, TM 1-7023AW-1 • Airworthiness Limitations Manual, TM 1-7023AW-2 Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

HTU-i

TM 1-70-23 • Vibration Manual, TM 1-70-VIB These manuals contain equipment description and data, troubleshooting, inspection, and maintenance data for field and Bench maintenance. The 10 Hour/14 Day (30 Hour/42 Day) Inspection Checklist, TM 1-70-PMS-1, contains complete inspection requirements for 10 hour/14 day (30 hour/ 42 day) inspections. It does not have instructions for repair, adjustment, or other means of correcting conditions, nor does it have troubleshooting instructions to find causes for malfunctioning. Refer to TM 1-70-23 or TM 11-70-23 for specific inspection, accept/reject criteria, or operational checks. The Periodic Inspection Checklist, TM 1-70-PMS-2, contains complete inspection requirements for periodic (500 hour) inspections. It does not have instructions for repair, adjustment or other means of correcting conditions, nor does it have troubleshooting instructions to find causes for malfunctioning. Refer to TM 1-70-23 or TM 11-70-23 for specific inspection, accept/reject criteria, or operational checks. The Aircraft Avionics Maintenance Procedures Manual, TM 11-70-23, contains descriptions, theories of operation, maintenance tasks, and Aircraft Fault Isolation Procedures for all the helicopter avionics systems. The Airworthiness Limitations Manual, TM 1-7023AW-1, contains a list of all components installed in the helicopter that must be removed from service for overhaul or replacement at the expiration of a specified number of flight hours. The Airworthiness Limitations Manual, TM 1-7023AW-2, contains a list of all components installed in the helicopter that must be removed from service for overhaul or replacement at the expiration of a specified number of flight hours. The Vibration Manual, TM 1-70-VIB, contains main and tail rotor blade track and balance, as well as vibration analysis procedures. Use of Icons. Ranges of helicopter effectivities, equipment configurations, and production line modifications HTU-ii

referenced throughout this manual shall be identified by an icon. Helicopter Serial Numbers and Model Designations. Ranges of helicopter effectivities shall be identified by an icon. 70588−SUBQ This icon is an example of an effectivity for helicopters serial numbers 70588 and subsequent. This represents helicopter serial number ranges all inclusive between serial numbers 70001 through 701441. S70−I

S70−II This represents helicopter serial number ranges all inclusive between serial numbers 701442 and subsequent.

Advanced Flight Control Computer. AFCC designates helicopters equipped with an advanced flight control computer.

Auxiliary Searchlight. MOD 1 designates helicopters equipped with Nightsun searchlight.

Engine Configurations. T701C

designates engine model T700-GE-

T701C. T701A T700

designates engine model T700-GE-T701A. designates engine model T700-GE-T700.

Electromagnetic Environmental Protection. EMEP designates S70-II helicopters serial numbers 701483, 701490, 701495, 701534 and subsequent which have electromagnetic environmental protection.

designates S70-I and S70-II W/O EMEP helicopters serial numbers 70001 through 701533, which do not have electromagnetic environmental protection. External Stores Support System.

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23 designates helicopters with provisions for external stores support system. ESSS

designates helicopters with no provisions for external stores support system. W/O ESSS

Fire Extinguishing System. FIRE designates helicopters equipped with improved fire extinguishing system.

Heated Center Windshield.

Stabilator Actuator, 70400-06641-117. ACT 117 designates helicopters equipped with stabilator actuators assembled with at least one stabilator actuator half, 70400-06641-117.

Stability Augmentation Set/Flight Path Stabilization. SAS/FPS designates helicopters equipped with an stability augmentation set/flight path stabilization computer.

designates helicopters equipped with HCW heated center windshield.

Upgrade.

designates helicopters not equipped with heated center windshield.

UPGRADE designates helicopters modified per Special Service Instruction (SSI) Nos S-70A-2 through S-70A-17.

W/O HCW

Hover Infrared Suppressor System. Winterization Kit. designates helicopters equipped with hover infrared suppressor system. HIRSS

W/O HIRSS designates helicopters not equipped with hover infrared suppressor system.

WINTER designates helicopters equipped with winterization kit. This kit assists engine start in cold weather.

Roll Vibration Absorber.

W/O WINTER designates helicopters equipped without winterization kit.

ROLL designates S70-II helicopters equipped with roll vibration absorber.

Definitions.

Rotor Brake System. designates helicopters equipped with rotor brake system.

WARNING

RTR BRAKE

designates helicopters not equipped with rotor brake system. W/O RTR BRAKE

Soft Lighting System. SLS designates helicopters equipped with night vision components. W/O SLS designates helicopters not equipped with night vision components.

Stabilator Actuator, 70400-06641-115. ACT 115 designates helicopters equipped with stabilator actuators assembled with at least one stabilator actuator half, 70400-06641-115.

An operating or maintenance procedure, practice, condition, statement, etc., which if not strictly observed, could result in injury to or death of personnel.

CAUTION

An operating or maintenance procedure, practice, condition, statement, etc., which if not strictly observed, could result in damage to equipment, destruction of equipment, loss of mission effectiveness, or long-term health hazards to personnel. Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

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TM 1-70-23 NOTE An essential operating or maintenance procedure, condition, or statement, which must be highlighted. Changes to this Manual. On a changed page, the portion of text effected by the latest change is indicated by a vertical line in the outer margin of the page. Changes to illustrations are indicated by a vertical line in the outer

HTU-iv

margin next to the figure title. In order to recommend changes to this manual, locally reproduce the enclosed Soundoff Report and complete the following sections: Aircraft Model, Book Number, Change No./Date, Chapt/WP#, Paragraph/Step, Figure (if applicable), Table (if applicable), Description, and Recommendation. Forward the Soundoff Report to your local Sikorsky Field Representative or forward the information to the Sikorsky Help Desk.

Change 7

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

TM 1-70-23

SIKORSKY AIRCRAFT CORPORATION SOUNDOFF REPORT SUBMIT THROUGH SIKORSKY REPRESENTATIVE OR SIKORSKY HELP DESK SOUNDOFF NO: REP NAME: LOCATION: PHONE NUMBER: DATE: AIRCRAFT MODEL: BOOK NUMBER: CHANGE NO. / DATE: CHAPT / WP #: PARAGRAPH / STEP: FIGURE: TABLE: DESCRIPTION:

RECOMMENDATION:

FT2459A SA

Change 7

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This Document contains technical data subject to ITAR. See WARNING and classifications on first page.

This Document contains technical data subject to ITAR. See WARNING and classifications on first page.