TM 55-1520-210-23-1 - Regulations.gov

TM 55-1520-210-23-1

TECHNICAL MANUAL

AVIATION UNIT AND INTERMEDIATEMAINTENANCE INSTRUCTIONS

ARMY MODEL UH-1H/V/EH-1H/XHELICOPTERS

This manual supersedes TM 55-1520-210-23-1, 20 February 1979, including all changes.

HEADQUARTERS, DEPARTMENT OF THE ARMY30 SEPTEMBER 1987

Manual provided by eMilitary Manuals-http://www.emilitarymanuals.com

CHANGE

NO. 42 }

C 42TM 55-1520-210-23-1

HEADQUARTERSDEPARTMENT OF THE ARMY

WASHINGTON, D.C., 14 April 2003

Aviation Unit and IntermediateMaintenance Instructions

ARMY MODEL UH-1H/V/EH-1H/XHELICOPTERS

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

TM 55-1520-210-23-1, dated 30 September 1987, is changed as follows:

1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical barin the margin. An illustration change is indicated by a miniature pointing hand.

Remove pages Insert pages

A through H A through HP-1 and P-2 P-1 and P-2i and ii i and ii1-21 and 1-22 1-21 and 1-221-30.3 and 1-30.4 1-30.3 and 1-30.41-37 and 1-38 1-37 and 1-381-105 and 1-106 1-105 and 1-1061-111 and 1-112 1-111 and 1-1122-119 and 2-120 2-119 and 2-1202-154.5/(2-154.6 blank) 2-154.5 and 2-154.63-14.1 and 3-14.2 3-14.1 and 3-14.24-42.3 and 4-42.4 4-42.3 and 4-42.44-43 through 4-46 4-43 through 4-464-57 and 4-58 4-57 and 4-584-73 and 4-74 4-73 and 4-744-93 and 4-94 4-93 and 4-945-9 and 5-10 5-9 and 5-105-15 and 5-16 5-15 and 5-165-25 through 5-28 5-25 through 5-285-33 and 5-34 5-33 and 5-345-67 and 5-68 5-67 and 5-685-68.1 and 5-68.2 5-68.1 and 5-68.25-69 and 5-70 5-69 and 5-705-85 and 5-86 5-85 and 5-865-91 and 5-92 5-91 and 5-925-103 and 5-104 5-103 and 5-1045-109 and 5-110 5-109 and 5-1106-23 and 6-24 6-23 and 6-24


TM 55-1520-210-23-1.To be distributed in accordance with Initial Distribution Number (IDN) 311408, requirements forDistribution:

Secretary of the Army Administrative Assistant to the

JOEL B. HUDSON

Chief of Staff Official:

General, United States Army ERIC K. SHINSEKI

By Order of the Secretary of the Army:

2. Retain this sheet in front of manual for reference purposes.

TM 55-1520-210-23-1C 42

Remove pages Insert pages

6-43 and 6-44 6-43 and 6-446-44.1 through 6-44.4 6-44.1 through 6-44.46-49 and 6-50 6-49 and 6-506-60.1/(6.60.2 blank) 6-60.1/(6.60.2 blank)6-89 through 6-92 6-89 through 6-926-101 and 6-102 6-101 and 6-1026-116.5 and 6-116.6 6-116.5 and 6-116.66-137 and 6-138 6-137 and 6-1386-138.1 through 6-138.3/(6-138.4 blank) 6-138.1 through 6-138.3/(6-138.4 blank)6-139 and 6-140 6-139 and 6-1406-147 and 6-148 6-147 and 6-1486-165 and 6-166 6-165 and 6-1666-166.5/(6-166.6 blank) 6-166.5/(6-166.6 blank)Index-13 and Index-14 Index-13 and Index-14

0307107


bailey-do

TM 55-1520-210-23-1TECHNICAL MANUAL

No. 55-1520-210-23-1

AVIATION UNIT AND INTERMEDIATEMAINTENANCE INSTRUCTIONS

ARMY MODEL UH-1H/V/EH-1 H/X

HEADQUARTERSDEPARTMENT OF THE ARMY

WASHINGTON, D.C.30 September 1987

This manual is printed in three volumes as follows:TM 55-1520-210-23-1, consisting of Table of Contents, preface, chapters 1 through 6.TM 55-1520-210-23-2, consisting of Table of Contents, chapters 7 through 17.TM 55-1520-210-23-3, consisting of Table of Contents, appendix A through F, and Index.The Appendixes and Index are applicable to all volumes.


TM 55-1520-210-23-1

Personnel performing operations, procedures,and practices which are included or implied in this

technical manual shall observe the following warnings.Disregard of these warnings and precautionaryinformation can cause serious injury, or death.

Warnings, cautions, and notes are used to emphasizeimportant and critical instructions and are used for

the following conditions:

An operating procedure, practice, etc., which,if not correctly followed, could result in personal

injury or loss of life.

An operating procedure, practice, etc., which, if notstrictly observed, could result in damage to or destruction

of equipment.

NOTE

An operating procedure, condition, etc., whichit is essential to highlight.

NOISE

Sound pressure levels in this helicopter during some operating conditions exceed the Surgeon General hearingconservation criteria, as defined in TB MED 501. Hearing protection devices, such as aviator helmet or ear plugsare required to be worn by all personnel in and around the helicopter during its operation.

ELECTROLYTE

Corrosive Battery Electrolyte (Potassium Hydroxide). Wear rubber gloves, apron, and face shield when handlingleaking batteries. If potassium hydroxide is spilled on clothing, or other material wash immediately with cleanwater. If spilled on personnel immediately start flushing the affected area with clean water. Continue washinguntil medical assistance arrives.

TOXIC POISONS

Turbine fuels and lubricating oils contain additives which are poisonous and readily absorbed throughthe skin. Do not allow them to remain on skin longer than necessary.

HANDLING HYDRAULIC FLUID (MIL-H-83282

Prolonged contact with liquid or mist can irritate eyes and skin. After any prolonged contact with skin,immediately wash contacted area with soap and water. If liquid contacts eyes, flush immediately withclear water. If liquid is swallowed, do not induce vomiting; get immediate medical attention. Wear rub-

ber gloves when handling liquid. If prolonged contact with mist is likely, wear an apporopriaterespirator. When fluid is decomposed by heating, toxic gases are released.

a


TM 55-1520-210-23-1

STARTING HELICOPTER

Starting and operation of the helicopter will be performed only by authorized personnel in accordancewith AR 95-1.

GROUNDING HELICOPTER

The helicopter should be electrically grounded when parked. Turn off all power switches beforemaking electrical connections or disconnections. Serious burns and electrical shock can result fromcontact with exposed electrical wires or connectors.

Before removing any engine ignition system component, ground the leads to dissipate any storedvoltage in ignition unit.

FIRE EXTINGUISHER

Exposure to high concentrations of monobromotrifluoromethane (CF3BR) extinguishing agent ordecomposition products should be avoided. The liquid should not be allowed to come into contactwith the skin, as it may cause frost bite or low temperature burns.

A R M AMENT

Loaded weapons, or weapons being loaded or unloaded, shall be pointed in a direction which offersthe least exposure to personnel or property in the event of accidental firing. Personnel shall remainclear of hazardous area of all loaded weapons.

ANY ROTATION OF THE GUN ARMAMENT SUBSYSTEM BARRELS WILL CAUSE THE GUN TO FIRE.Upon landing, immediately alert personnel to probable presence of live rounds in the gun. Summonarmament repairman to clear weapon.

FUELING AND DEFUELING

When refueling helicopter, the refueling vehicle or forward air refueling unit must be parked aminimum of 20 feet from the helicopter. Before starting the fueling operation, always insert fuelingnozzle grounding chain of fuel truck ground wire into GROUND HERE receptacle located on the rightside of the helicopter aft of the cabin area. Refer to FM 10-68.

When defueling, turn off all electrical switches and disconnect external power from the helicopter. Thehelicopter must be electrically grounded prior to defueling.

RADIOACTIVE MATERIALS

Self-luminous dials and ignition units may contain radioactive materials. if such an instrument or unit isbroken or becomes unsealed, avoid personal contact. Use forceps or gloves made of rubber orpolyethylene to pick up contaminated material. Place materials and gloves in a plastic bag. Seal bagand dispose of it as radioactive waste in accordance with AR755-15 and TM 3-261 (Refer to TB43-0108). Repair procedures shall conform to requirements in AR700-52.

CLEANING SOLVENTS

Cleaning solvents may be flammable and toxic. Use only in well ventilated areas. Avoid inhalation ofvapor and skin contact. Do not use solvents near open flame or in areas where very high temperaturesprevail.

ROTOR BLADES

Personnel will stay clear of rotor blades during operation. Refer to Chapter 1 for rotor bladedimensions and clearances.

b


TM 55-1520-210-23-1

TOOLS

Use only chrome plated steel or unplated steel tools for disassembly or reassembly procedures.Because the platings are prone to chipping and flaking, the use of cadmium or zink plated tools is notpermitted. If these chips or flakes become embedded in aircraft parts, galvanic corrosion will result. Ifthese chips or flakes enter fuel or oil wetted components, they may eventually clog the filter orproduce intergranular attack of nickel or titanium base alloys at elevated temperatures. Regardless ofthe type of plating, all tools must be serviceable and free of chipping.

c


TM 55-1520-210-23-1

Change 42 A*Zero in this column indicates an original page.

LIST OF EFFECTIVE PAGES

Insert latest changed pages; dispose of superseded pages in accordance with regulations.

NOTE: On a changed page, the portion of the text affected by the latest change is indicated by a vertical line, or otherchange symbol, in the outer margin of the page. Changes to illustrations are indicated by miniature pointing hands.Changes to wiring diagrams are indicated by shaded areas.

Dates of issue for original and changed pages are:

Original 0 30 September 1987. . . . . . . . . . . .Change 1 8 January 1989. . . . . . . . . . . .Change 2 15 May 1989. . . . . . . . . . . .Change 3 23 June 1989. . . . . . . . . . . .Change 4 28 July 1989. . . . . . . . . . . .Change 5 06 October 1989. . . . . . . . . . . .Change 6 17 November 1989. . . . . . . . . . . .Change 7 30 November 1989. . . . . . . . . . . .Change 8 2 January 1990. . . . . . . . . . . .Change 9 31 January 1990. . . . . . . . . . . .Change 10 31 January 1990. . . . . . . . . . .Change 11 01 March 1990. . . . . . . . . . .Change 12 12 April 1990. . . . . . . . . . .Change 13 01 August 1990. . . . . . . . . . .Change 14 10 August 1990. . . . . . . . . . .Change 15 17 September 1990. . . . . . . . . . .Change 16 11 December 1990. . . . . . . . . . .Change 17 28 February 1991. . . . . . . . . . .Change 18 14 May 1991. . . . . . . . . . .Change 19 14 June 1991. . . . . . . . . . .Change 20 01 July 1991. . . . . . . . . . .

Change 21 15 January 1992. . . . . . . . . . .Change 22 31 March 1993. . . . . . . . . . .Change 23 15 October 1992. . . . . . . . . . .Change 24 30 November 1992. . . . . . . . . . .Change 25 15 December 1992. . . . . . . . . . .Change 26 15 January 1993. . . . . . . . . . .Change 27 02 June 1993. . . . . . . . . . .Change 28 23 September 1994. . . . . . . . . . .Change 29 12 December 1994. . . . . . . . . . .Change 30 31 July 1995. . . . . . . . . . .Change 31 26 January 1996. . . . . . . . . . .Change 32 12 August 1996. . . . . . . . . . .Change 33 28 September 1996. . . . . . . . . . .Change 34 07 October 1996. . . . . . . . . . .Change 35 22 January 1998. . . . . . . . . . .Change 36 19 November 1999. . . . . . . . . . .Change 37 15 January 2001. . . . . . . . . . .Change 38 06 July 2001. . . . . . . . . . .Change 39 15 October 2001. . . . . . . . . . .Change 40 19 April 2002. . . . . . . . . . .Change 41 1 July 2002. . . . . . . . . . .

Page *Change Page *ChangeNo. No. No. No.

Cover 0. . . . . . . . . . . . . . . . .a --- c 0. . . . . . . . . . . . . . . . . .P-1 and P-2 38. . . . . . . . . . . .A -- H 42. . . . . . . . . . . . . . . . .i 42. . . . . . . . . . . . . . . . . . . . . .ii and iii 8. . . . . . . . . . . . . . . .

1-1 37. . . . . . . . . . . . . . . . . . . .1-2 0. . . . . . . . . . . . . . . . . . . .1-3 19. . . . . . . . . . . . . . . . . . . .1-4 0. . . . . . . . . . . . . . . . . . . .1-5 37. . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . .1-8 37. . . . . . . . . . . . . . . . . . . .1-9 22. . . . . . . . . . . . . . . . . . . .1-10 . . . . . . . . . . . . . . . . . 24

1-12 and 1-13 13. . . . . . . . . . .1-14 24

. .. . . . . . . . . . . . . . . .1-15 -- 1-18 37. . . . . . . . . . . .

1-21 42. . . . . . . . . . . . . . . . .1-22 24. . . . . . . . . . . . . . . . . .1-23 22. . . . . . . . . . . . . . . . . .1-24 8. . . . . . . . . . . . . . . . . .1-25 and 1-26 33 . . . . . . . . . .1-27 13. . . . . . . . . . . . . . . . . .1-28 and 1-29 24. . . . . . . . . . .1-30 13. . . . . . . . . . . . . . . . . .1-30.1 and 1-30.2 37. . . . . . .1-30.3 13. . . . . . . . . . . . . . . . .1-30.4 42. . . . . . . . . . . . . . . . .1-30.5 13. . . . . . . . . . . . . . . . .1-30.6 blank 13. . . . . . . . . . . .1-31 and 1-32 24. . . . . . . . . .1-33 19. . . . . . . . . . . . . . . . . .1-34 30. . . . . . . . . . . . . . . . . .1-35 24. . . . . . . . . . . . . . . . . .1-36 21. . . . . . . . . . . . . . . . . .1-37 13. . . . . . . . . . . . . . . . . .1-38 . . . . . . . . . . . . . . . . . 42

Change . . . . 42 . . . . . . . 14 April 2003

1-6 and 1-7 0

iv blank . . . . . . . . . . . . . . . 0

1-10.2 blank . . . . . . . . . . . 241-11 . . . . . . . . . . . . . . . . . 24

1-10.1 . . . . . . . . . . . . . . . . 24

1-19 – 1-20 . . . . . . . . . . . 13

1-39 . . . . . . . . . . . . . . . . . 8


TM 55-1520-210-23-1

B Change 42

*Zero in this column indicates an original page.


1-40 and 1-41 0. . . . . . . . . .1-42 22. . . . . . . . . . . . . . . . . .1-42.1 8. . . . . . . . . . . . . . . . .1-42.2 blank 8. . . . . . . . . . . .1-43 -- 1-50 0. . . . . . . . . . . .1-51 and 1-52 33. . . . . . . . . .1-53 0. . . . . . . . . . . . . . . . . .1-54 and 1-55 13. . . . . . . . . . .1-56 19. . . . . . . . . . . . . . . . . .1-57 and 1-58 0. . . . . . . . . . .1-59 8. . . . . . . . . . . . . . . . . .1-60 0. . . . . . . . . . . . . . . . . .1-60.1 8. . . . . . . . . . . . . . . . .1-60.2 . . . . . . . . . . . . . . . 19

1-62 and 1-63 0. . . . . . . . . . .1-64 13. . . . . . . . . . . . . . . . . .1-65 0. . . . . . . . . . . . . . . . . .1-66 22. . . . . . . . . . . . . . . . . .1-67 0. . . . . . . . . . . . . . . . . .

1-68.1 and 1-68.2 33. . . . . . . .1-69 8. . . . . . . . . . . . . . . . . .1-70 0. . . . . . . . . . . . . . . . . .1-71 -- 1-73 1. . . . . . . . . . . .1-74 0. . . . . . . . . . . . . . . . . .1-75 19. . . . . . . . . . . . . . . . . .1-76 0. . . . . . . . . . . . . . . . . .1-77 19. . . . . . . . . . . . . . . . . .1-78 blank 19. . . . . . . . . . . . .1-79 -- 1-81 19. . . . . . . . . . . .1-82 . . . . . . . . . . . . . . . . . . 24

1-83 2. . . . . . . . . . . . . . . . . .1-84 and 1-85 13. . . . . . . . . . .1-86 0. . . . . . . . . . . . . . . . . .1-87 1. . . . . . . . . . . . . . . . . .1-88 19. . . . . . . . . . . . . . . . . .1-89 1. . . . . . . . . . . . . . . . . .1-90 and 1-91 0. . . . . . . . . . .1-92 and 1-93 13. . . . . . . . . . .1-94 . . . . . . . . . . . . . . . . . . 1

1-95 37. . . . . . . . . . . . . . . . . .1-96 0. . . . . . . . . . . . . . . . . .1-97 and 1-98 33. . . . . . . . . . .1-99 and 1-100 32. . . . . . . . . .1-101 13. . . . . . . . . . . . . . . . .1-102 blank 13. . . . . . . . . . . .1-103 and 1-104 24. . . . . . . . .1-105 37. . . . . . . . . . . . . . . . .1-106 42. . . . . . . . . . . . . . . . .1-107 33. . . . . . . . . . . . . . . . .

1-109 41. . . . . . . . . . . . . . . . .1-110 34. . . . . . . . . . . . . . . . . .1-111 41. . . . . . . . . . . . . . . . . .1-112 42. . . . . . . . . . . . . . . . . .1-113 41. . . . . . . . . . . . . . . . . .1-114 39. . . . . . . . . . . . . . . . . .1-115 . . . . . . . . . . . . . . . . . 31

1-117 - 1-122 31. . . . . . . . . . . .

2-1 37. . . . . . . . . . . . . . . . . . . .2-2 -- 2-8 0. . . . . . . . . . . . . .2-9 19. . . . . . . . . . . . . . . . . . . .2-10 -- 2-15 0. . . . . . . . . . . .2-16 and 2-17 22. . . . . . . . . . .2-18 13. . . . . . . . . . . . . . . . . .2-19 0. . . . . . . . . . . . . . . . . .2-20 22. . . . . . . . . . . . . . . . . .2-21 and 2-22 0. . . . . . . . . . .2-23 22. . . . . . . . . . . . . . . . . .2-24 -- 2-30 0. . . . . . . . . . . .2-31 and 2-32 37. . . . . . . . . . .2-33 and 2-34 33. . . . . . . . . . .2-35 0. . . . . . . . . . . . . . . . . .2-36 13. . . . . . . . . . . . . . . . . .2-37 -- 2-43 0. . . . . . . . . . . .2-44. . . . . . . . . . . . . . . . . 33

2-44.2 blank 33. . . . . . . . . . . .2-45 33. . . . . . . . . . . . . . . . . .2-46 13. . . . . . . . . . . . . . . . . .2-47 -- 2-52 0. . . . . . . . . . . . .

2-52.2 blank 0. . . . . . . . . . . .2-53 24. . . . . . . . . . . . . . . . . .2-54 37. . . . . . . . . . . . . . . . . .2-55 13. . . . . . . . . . . . . . . . . .2-56 -- 2-58 0. . . . . . . . . . . .2-59 37. . . . . . . . . . . . . . . . . .2-60 -- 2-63 0. . . . . . . . . . . .2-64 37. . . . . . . . . . . . . . . . . .2-65 and 2-66 0. . . . . . . . . . .2-67 37. . . . . . . . . . . . . . . . . .2-68 0. . . . . . . . . . . . . . . . . .2-69 33. . . . . . . . . . . . . . . . . .2-70 -- 2-73 0. . . . . . . . . . . .2-74 37. . . . . . . . . . . . . . . . . .2-75 -- 2-78 0. . . . . . . . . . . .2-79 37. . . . . . . . . . . . . . . . . .2-80 -- 2-82 0. . . . . . . . . . . .2-83 13. . . . . . . . . . . . . . . . . .2-84 37. . . . . . . . . . . . . . . . . .

1-94 .2 blank. . . . . . . . . . . . 1

1-116. . . . . . . . . . . . . . . . . 36

1-123 and 1-124. . . . . . . . 361-125 . . . . . . . . . . . . . . . . 311-126 blank. . . . . . . . . . . . 31

1-94.1 . . . . . . . . . . . . . . . . 1

1-82.1 and 1-82.2 . . . . . . 24

1-68 . . . . . . . . . . . . . . . . . . 33

1-61 . . . . . . . . . . . . . . . . . 19

2-52.1 . . . . . . . . . . . . . . . . 0

2-44.1 . . . . . . . . . . . . . . . . 33

LIST OF EFFECTIVE PAGES (CON'T)

1-108 . . . . . . . . . . . . . . . . 37


TM 55-1520-210-23-1

Change 42 C*Zero in this column indicates an original page.


2-96 blank 0. . . . . . . . . . . . .2-97 -- 2-99 0. . . . . . . . . . . .2-100 22. . . . . . . . . . . . . . . . .2-101 33. . . . . . . . . . . . . . . . .2-102 blank 33. . . . . . . . . . . .2-103 22. . . . . . . . . . . . . . . . .2-104 37. . . . . . . . . . . . . . . . .2-105 and 2-106 0 . . . . . . . .2-107 37. . . . . . . . . . . . . . . . .2-108 0. . . . . . . . . . . . . . . . .2-109 33. . . . . . . . . . . . . . . . .2-110 blank 33. . . . . . . . . . . .2-111 -- 2-115 0. . . . . . . . . . .2-116 37. . . . . . . . . . . . . . . . . .2-117 and 2-118 0. . . . . . . . .

2-120 37. . . . . . . . . . . . . . . . .2-120.1 and 2-120.2 33. . . . .2-121 19. . . . . . . . . . . . . . . . .2-122 -- 2-124 33. . . . . . . . . .2-125 -- 2-129 0. . . . . . . . . .2-130 19. . . . . . . . . . . . . . . . .2-130.1 37. . . . . . . . . . . . . . . .2-130.2 blank 19. . . . . . . . . .2-131 0. . . . . . . . . . . . . . . . .2-132 33. . . . . . . . . . . . . . . . .2-133 and 2-134 0. . . . . . . . .2-135 and 2-136 . . . . . . . . 34

2-136.2 blank 34. . . . . . . . . .2-137 -- 2-139 0. . . . . . . . . .2-140 13. . . . . . . . . . . . . . . . .2-141 and 2-142 . . . . . . . . 02-143 22. . . . . . . . . . . . . . . . .2-144 . . . . . . . . . . . . . . . . . 13

2-144.2 blank 13. . . . . . . . . .2-145 19. . . . . . . . . . . . . . . . .2-146 . . . . . . . . . . . . . . . . 0

2-146.2 blank 0. . . . . . . . . .2-147 37. . . . . . . . . . . . . . . . .2-148 and 2-149 0. . . . . . . . .2-150 37. . . . . . . . . . . . . . . . .2-151 -- 2-152 33. . . . . . . . . .2-153 – 2-154 38. . . . . . . . . . .

2-154.6 . . . . . . . . . . . . . . 422-155 and 2-156 0. . . . . . . . . .2-157 37. . . . . . . . . . . . . . . . .2-158 – 2-164 . . . . . . . . . 02-164.1 . . . . . . . . . . . . . 0

2-165 – 2-179 0. . . . . . . . . .2-180 19. . . . . . . . . . . . . . . . .2-181 and 2-182 37. . . . . . . . . .2-182.1 13. . . . . . . . . . . . . . . .2-182.2 blank . . . . . . . . . 132-183 0. . . . . . . . . . . . . . . . .2-184 and 2-185 . . . . . . . . 372-186 and 2-187 . . . . . . . . 02-188 37. . . . . . . . . . . . . . . . .2-189 -- 2-192 0. . . . . . . . . .2-193 13. . . . . . . . . . . . . . . . .2-194 blank 13. . . . . . . . . . . .2-195 and 2-196 . . . . . . . . 222-197 37. . . . . . . . . . . . . . . . .2-198 33. . . . . . . . . . . . . . . . .2-199 -- 2-204 0. . . . . . . . . .2-205 13. . . . . . . . . . . . . . . . .2-206 0. . . . . . . . . . . . . . . . .2-207 and 2-208 37. . . . . . . .2-209 and 2-210 33. . . . . . . . .2-211 19. . . . . . . . . . . . . . . . . .2-212 0. . . . . . . . . . . . . . . . .2-213 13. . . . . . . . . . . . . . . . .2-214 22. . . . . . . . . . . . . . . . .2-215 -- 2-217 13. . . . . . . . . .2-218 -- 2-226 0. . . . . . . . . .2-227 37. . . . . . . . . . . . . . . . .2-228 0. . . . . . . . . . . . . . . . .2-229 37. . . . . . . . . . . . . . . . .2-230 13. . . . . . . . . . . . . . . . .2-231 and 2-232 0. . . . . . . . .2-233 and 2-234 24. . . . . . . .2-234.1 23. . . . . . . . . . . . . . . .2-234.2 blank 23. . . . . . . . . .

2-248 13. . . . . . . . . . . . . . . . .2-249 and 2-250 0. . . . . . . .2-250.1 and 2-250.2 0. . . . ..2-251 -- 2-253 0. . . . . . . . . .2-254 22. . . . . . . . . . . . . . . . .2-255 37. . . . . . . . . . . . . . . . .2-256 33. . . . . . . . . . . . . . . . .2-257 -- 2-260 0. . . . . . . . . .2-261 13. . . . . . . . . . . . . . . . .2-262 – 2-264 . . . . . . . . . . 0

2-94 and 2-95 . . . . . . . . . . 02-92 and 2-93 . . . . . . . . . . 372-90 and 2-91 . . . . . . . . . . 02-89 . . . . . . . . . . . . . . . . . 132-88.2 . . . . . . . . . . . . . . . . 372-88.1. . . . . . . . . . . . . . . . 132-88 . . . . . . . . . . . . . . . . . 02-86 and 2-87. . . . . . . . . . 372-85 . . . . . . . . . . . . . . . . . 0

2-146.1 . . . . . . . . . . . . . . . . 0

2-154.5 . . . . . . . . . . . . . . . 42

2-144.1 . . . . . . . . . . . . . . . 13

2-136.1 . . . . . . . . . . . . . . . 34


2-247 . . . . . . . . . . . . . . . . 372-235 – 2-246 . . . . . . . . . 0

2-164.2 blank . . . . . . . . . 0

2-119 . . . . . . . . . . . . . . . 42

2-154.1 – 2-154.4 . . . . . . 38


TM 55-1520-210-23-1

D Change 42



2-264.1 0. . . . . . . . . . . . . . . . .2-264.2 blank 0. . . . . . . . . . . . . . . . . .2-265 – 2-268 37. . . . . . . . . .2-269 and 2-270 13. . . . . .. . .2-271 12. . . . . . . . . . . . . . . . . .2-272 13. . . . . . . . . . . . . . . . .3-1 37. . . . . . . . . . . . . . . . . .3-2 . . . . . . . . . . . . . . . . . . 03-3 22. . . . . . . . . . . . . . . . . . .3-4 37. . . . . . . . . . . . . . . . . . . .3-4.1 22. . . . . . . . . . . . . . . . . . .3-4.2 blank 13. . . . . . . . . . . . .3-5 22. . . . . . . . . . . . . . . . . . . .3-6 13. . . . . . . . . . . . . . . . . . .3-7 and 3-8 37. . . . . . . . . . . . .3-9 – 3-13 0. . . . . . . . . . . . . .3-14 13. . . . . . . . . . . . . . . . . .3-14.1 42. . . . . . . . . . . . . . . . .3-14.2 42. . . . . . . . . . . . . . . .3-15 24. . . . . . . . . . . . . . . . . .3-16 37. . . . . . . . . . . . . . . . . .3-17 13. . . . . . . . . . . . . . . . . .3-18 12. . . . . . . . . . . . . . . . . .3-19 – 3-23 0. . . . . . . . . . . .3-24 13. . . . . . . . . . . . . . . . . .3-25 -- 3-31 0. . . . . . . . . . . .3-32 blank 0 . . . . . . . . . . . . .4-1 0. . . . . . . . . . . . . . . . . .4-2 13. . . . . . . . . . . . . . . . . . .4-3 19. . . . . . . . . . . . . . . . . .4-4 0. . . . . . . . . . . . . . . . . . .4-5 and 4-6 19. . . . . . . . . . . . .4-7 -- 4-9 0. . . . . . . . . . . . . .4-10 33. . . . . . . . . . . . . . . . . .4-11 and 4-12 0. . . . . . . . . .4-13 33. . . . . . . . . . . . . . . . . .4-14 -- 4-16 0. . . . . . . . . . . .4-17 13. . . . . . . . . . . . . . . . . .4-18 37. . . . . . . . . . . . . . . . . .4-19 – 4-23 0. . . . . . . . . . . . .4-24 37. . . . . . . . . . . . . . . . . .4-25 and 4-26 0. . . . . . . . . . .

4-27 22. . . . . . . . . . . . . . . . . .4-28 and 4-29 0. . . . . . . . . . .4-30 37. . . . . . . . . . . . . . . . . .4-31 -- 4-35 0. . . . . . . . . . . .4-36 37. . . . . . . . . . . . . . . . . .4-37 – 4-40 0. . . . . . . . . . . . .

4-41 19. . . . . . . . . . . . . . . . . .4-42 17. . . . . . . . . . . . . . . . .4-42.1 – 4-42.3 37. . . . . . . . .

4-42.4.1 and 4-42.4.2 24. . .

4-42.4.3 and 4-42.4.4 . . . 144-42.5 . . . . . . . . . . . . . . . 14-42.6 and 4-42.7 37. . . . . . . .4-42.8 blank 1. . . . . . . . . . . .

4-43 and 4-44 42. . . . . . . . . . .

4-45 19. . . . . . . . . . . . . . . . . .4-46 42. . . . . . . . . . . . . . . . . .4-46.1 36. . . . . . . . . . . . . . . .4-46.2 blank 36. . . . . . . . . . . .

4-47 0. . . . . . . . . . . . . . . . . .4-48 37. . . . . . . . . . . . . . . . . .4-49 0. . . . . . . . . . . . . . . . . .4-50 33. . . . . . . . . . . . . . . . . .4-51 and 4-52 0. . . . . . . . . . . .4-53 and 4-54 37. . . . . . . . . . .4-55 24. . . . . . . . . . . . . . . . . .4-56 13. . . . . . . . . . . . . . . . . .4-56.1 13. . . . . . . . . . . . . . . . .4-56.2 blank 13. . . . . . . . . . . .

4-57 42. . . . . . . . . . . . . . . . . .4-58 19. . . . . . . . . . . . . . . . . .4-59 37. . . . . . . . . . . . . . . . . . .4-60 19. . . . . . . . . . . . . . . . . .4-60.1 and 4-60.2 37. . . . . . . .4-60.3 24. . . . . . . . . . . . . . . . .4-60.4 37. . . . . . . . . . . . . . . . .4-60.4.1 37. . . . . . . . . . . . . . . .4-60.4.2 blank 37. . . . . . . . . .

4-60.5 – 4-60.12 37. . . . . . . .

4-61 131. . . . . . . . . . . . . . . . . .4-62 22. . . . . . . . . . . . . . . . . .4-63 – 4-66 0. . . . . . . . . . . .

4-67 13. . . . . . . . . . . . . . . . . .4-68 37. . . . . . . . . . . . . . . . . .4-69 and 4-70 0. . . . . . . . . . .4-71 and 4-72 37. . . . . . . . . .

4-73 22. . . . . . . . . . . . . . . . .4-74 42. . . . . . . . . . . . . . . . . .4-75 13. . . . . . . . . . . . . . . . . .4-76 0. . . . . . . . . . . . . . . . . .4-77 22. . . . . . . . . . . . . . . . . .4-78 19. . . . . . . . . . . . . . . . .4-78.1 33. . . . . . . . . . . . . . . . .4-78.2 blank 25. . . . . . . . . . . .

4-79 37. . . . . . . . . . . . . . . . . .4-80 13. . . . . . . . . . . . . . . . . . .4-81 0. . . . . . . . . . . . . . . . . .4-82 13. . . . . . . . . . . . . . . . . . .4-83 28. . . . . . . . . . . . . . . . . .4-84 0. . . . . . . . . . . . . . . . . . .4-85 33. . . . . . . . . . . . . . . . . . .4-86 0. . . . . . . . . . . . . . . . . .4-87 37. . . . . . . . . . . . . . . . . . .4-88 0. . . . . . . . . . . . . . . . . . .


4-42.4 . . . . . . . . . . . . . . . . 42


TM 55-1520-210-23-1

Change 42 E



4-89 13. . . . . . . . . . . . . . . . . .4-90 – 4-92 0. . . . . . . . . . . .4-93 42. . . . . . . . . . . . . . . . . .4-94 and 4-95 0. . . . . . . . . . .4-96 13. . . . . . . . . . . . . . . . . . .4-97 33. . . . . . . . . . . . . . . . . .4-98 31. . . . . . . . . . . . . . . . . .4-99 19. . . . . . . . . . . . . . . . . .4-100 0. . . . . . . . . . . . . . . . . .4-101 – 4-106 8. . . . . . . . . ..4-107 13. . . . . . . . . . . . . . . . . .4-108 37. . . . . . . . . . . . . . . . .4-109 13. . . . . . . . . . . . . . . . . .4-110 7. . . . . . . . . . . . . . . . .4-111 and 4-112 19. . . . . . . . .

4-113 0. . . . . . . . . . . . . . . . . .4-114 blank 0. . . . . . . . . . . . . . . . . .5-1 13. . . . . . . . . . . . . . . . . . .5-2 8. . . . . . . . . . . . . . . . . . .5-2.1 and 5-2.1 1. . . . . . . . .

5-3 13. . . . . . . . . . . . . . . . . . .5-4 8. . . . . . . . . . . . . . . . . . . .5-4.1 20. . . . . . . . . . . . . . . . . .5-4.2 22. . . . . . . . . . . . . . . . .5-5 and 5-6 22. . . . . . . . . . . . .5-6.1 and 5-6.2 13. . . . . . . . .

5-7 and 5-8 0. . . . . . . . . . . . .5-9 33. . . . . . . . . . . . . . . . . . . .5-10 42. . . . . . . . . . . . . . . . . . .5-11 0. . . . . . . . . . . . . . . . . . .5-12 8. . . . . . . . . . . . . . . . . .5-13 28. . . . . . . . . . . . . . . . . .5-14 0. . . . . . . . . . . . . . . . . .5-15 42. . . . . . . . . . . . . . . . . .5-16 19. . . . . . . . . . . . . . . . . . .5-17 and 5-18 11. . . . . . . . . .5-18.1 13. . . . . . . . . . . . . . . . .5-18.2 blank 12. . . . . . . . . . . .

5-19 11. . . . . . . . . . . . . . . . . .5-20 22. . . . . . . . . . . . . . . . . . .5-21 28. . . . . . . . . . . . . . . . . .5-22 37. . . . . . . . . . . . . . . . . .5-22.1 8. . . . . . . . . . . . . . . . .5-22.2 1. . . . . . . . . . . . . . . . . .5-23 0. . . . . . . . . . . . . . . . . .5-24 8. . . . . . . . . . . . . . . . . . .5-25 0. . . . . . . . . . . . . . . . . . .5-26 and 5-27 42. . . . . . . . . .. .5-28 0. . . . . . . . . . . . . . . . . .5-28.1 and 5-28.2 0. . . . . . .

5-28.3 0. . . . . . . . . . . . . . . .5-28.4 blank 1. . . . . . . . . . . .5-29 0. . . . . . . . . . . . . . . . . .

5-30 37. . . . . . . . . . . . . . . . . .5-30.1 37. . . . . . . . . . . . . . . . .5-30.2 blank 0. . . . . . . . . . . .5-31 11. . . . . . . . . . . . . . . . . .5-32 22. . . . . . . . . . . . . . . . . .5-32.1 13. . . . . . . . . . . . . . . . .5-32.2 37. . . . . . . . . . . . . . . . .5-32.3 28. . . . . . . . . . . . . . . .5-32.4 blank 22. . . . . . . . . . .5-33 28. . . . . . . . . . . . . . . . .5-34 42. . . . . . . . . . . . . . . . . . .5-34.1 9. . . . . . . . . . . . . . . .5-34.2 blank 9. . . . . . . . . . .5-35 0. . . . . . . . . . . . . . . . .5-36 8. . . . . . . . . . . . . . . . . .5-37 0. . . . . . . . . . . . . . . . . .5-38 28. . . . . . . . . . . . . . . . . . .5-38.1 24. . . . . . . . . . . . . . . . . .5-38.2 1. . . . . . . . . . . . . . . .5-38.3 13. . . . . . . . . . . . . . . .5-38.4 blank 0. . . . . . . . . . .

5-39 0. . . . . . . . . . . . . . . . . .5-40 37. . . . . . . . . . . . . . . . . . .5-40.1 37. . . . . . . . . . . . . . . . .5-40.2 blank 0. . . . . . . . . . . .

5-41 and 5-42 37. . . . . . . . . .

5-43 0. . . . . . . . . . . . . . . . . . .5-44 37. . . . . . . . . . . . . . . . . . .5-45 – 5-48 13. . . . . . . . . . . . . 5-49 and 5-50 0. . . . . . . . . . .

5-51 13. . . . . . . . . . . . . . . . . .5-52 33. . . . . . . . . . . . . . . . . .5-53 24. . . . . . . . . . . . . . . . . .5-54 13. . . . . . . . . . . . . . . . . .5-54.1 – 5-54.12 13. . . . . . . .

5-54.13 and 5-54.14 22. . . . .

5-54.15 – 5-54.20 13. . . . . . .

5-54.21 8. . . . . . . . . . . . . . .5-54.22 – 5-54.44 13. . . . . . .

5-54.45 and 5-54.46 39. . . . . .

5-54.47 and 5-54.48 13. . . .. .5-54.49 37. . . . . . . . . . . . . . . .5-54.50 blank 13. . . . . . .. . . . .5-55 0. . . . . . . . . . . . . . . . . .5-56 8. . . . . . . . . . . . . . . . . .5-57 -- 5-60 33. . . . . . . . . . . .5-60.1 33. . . . . . . . . . . . . . . . .5-60.2 blank 33. . . . . . . . . . . .5-61 8. . . . . . . . . . . . . . . . . .5-62 13. . . . . . . . . . . . . . . . . .5-62.1 0. . . . . . . . . . . . . . . . .5-62.2 13. . . . . . . . . . . . . . . . .5-63 0. . . . . . . . . . . . . . . . . .



TM 55-1520-210-23-1

F Change 42



5-64 13. . . . . . . . . . . . . . . . . .5-64.1 0. . . . . . . . . . . . . . . .5-64.2 13. . . . . . . . . . . . . . . . .5-65 33. . . . . . . . . . . . . . . . . .5-66 39. . . . . . . . . . . . . . . . . .5-67 42. . . . . . . . . . . . . . . . . .5-68 0. . . . . . . . . . . . . . . . . .5-68.1 13. . . . . . . . . . . . . . . . .5-68.2 42. . . . . . . . . . . . . . . .5-69 42. . . . . . . . . . . . . . . . . . .5-70 0. . . . . . . . . . . . . . . . . .5-71 and 5-72 37. . . . . . . . . .

5-72.1 – 5.72.3 1. . . . . . . . .

5-72.4 blank 1. . . . . . . . . . . .5-72.5 39. . . . . . . . . . . . . . . .5-72.6 1. . . . . . . . . . . . . . . . .5-73 10. . . . . . . . . . . . . . . . . .5-74 37. . . . . . . . . . . . . . . . . .5-75 0. . . . . . . . . . . . . . . . . . .5-76 22. . . . . . . . . . . . . . . . . .5-77 and 5-78 22. . . . . . . . . . .5-79 37. . . . . . . . . . . . . . . . . .5-80 and 5-81 0. . . . . . . . . . . .5-82 24. . . . . . . . . . . . . . . . . . .5-83 33. . . . . . . . . . . . . . . . . .5-84 37. . . . . . . . . . . . . . . . . . .5-84.1 6. . . . . . . . . . . . . . . . .5-84.2 blank 6. . . . . . . . . . . . . . . .5-85 42. . . . . . . . . . . . . . . . .5-86 and 5-87 0. . . . . . . . . .

5-88 39. . . . . . . . . . . . . . . . . .5-89 and 5-90 0. . . . . . . . . . .

5-91 42. . . . . . . . . . . . . . . . . . .5-92 31. . . . . . . . . . . . . . . . . .5-93 37. . . . . . . . . . . . . . . . .5-94 – 5-96 0. . . . . . . . . . . .5-97 8. . . . . . . . . . . . . . . . . . .5-98 and 5-99 0. . . . . . . . . . .5-100 37. . . . . . . . . . . . . . . . .5-101 0. . . . . . . . . . . . . . . . .5-102 39. . . . . . . . . . . . . . . . .5-103 42. . . . . . . . . . . . . . . . .5-104 39. . . . . . . . . . . . . . . .5-105 and 5-106 10. . . . . . .

5-107 37. . . . . . . . . . . . . . . . .5-108 13. . . . . . . . . . . . . . . . .5-109 1. . . . . . . . . . . . . . . .5-110 42. . . . . . . . . . . . . . . .5-111 and 5-112 1. . . . . . .. .5-113 22. . . . . . . . . . . . . . . . .5-114 1. . . . . . . . . . . . . . . . .5-115 8. . . . . . . . . . . . . . . . .5-116 19. . . . . . . . . . . . . . . . .

5-117 22. . . . . . . . . . . . . . . .5-118 8. . . . . . . . . . . . . . . . .5-118.1 0. . . . . . . . . . . . . . . .5-118.2 blank 0. . . . . . . . . .5-119 and 5-120 8. . . . . . .. . .5-121 37. . . . . . . . . . . . . . . . .5-122 33. . . . . . . . . . . . . . . . .5-123 22. . . . . . . . . . . . . . . .5-124 13. . . . . . . . . . . . . . . . .5-124.1 37. . . . . . . . . . . . . . . .5-124.2 blank 13. . . . . . . . . .5-125 22. . . . . . . . . . . . . . . .5-126 13. . . . . . . . . . . . . . . . .5-127 22. . . . . . . . . . . . . . . .5-128 24. . . . . . . . . . . . . . . . .5-129 1. . . . . . . . . . . . . . . . .5-130 22. . . . . . . . . . . . . . . .5-130.1 24. . . . . . . . . . . . . . .5-130.2 blank 0. . . . . . . . . .5-131 22. . . . . . . . . . . . . . . .5-132 37. . . . . . . . . . . . . . . . .5-133 and 5-134 0. . . . . . .. .5-135 and 5-136 34. . . . .. . . .5-136.1 34. . . . . . . . . . . . . . . .5-136.2 blank 34. . . . . . . . . . .5-137 0. . . . . . . . . . . . . . . . . .5-138 8. . . . . . . . . . . . . . . . . 5-139 and 5-140 0. . . . . . .. .5-141 13. . . . . . . . . . . . . . . . .5-142 blank 0. . . . . . . . . . . . .5-143 – 5-146 0. . . . . . .. . . .5-147 – 5-149 33. . . . . . . . . .5-150 0. . . . . . . . . . . . . . . . . .5-151 13. . . . . . . . . . . . . . . . .5-152.1 and 5-152.2 13. . . .. .5-153 22. . . . . . . . . . . . . . . . .5-154 13. . . . . . . . . . . . . . . . .5-154.1 and 5-154.2 13. . . .5-155 13. . . . . . . . . . . . . . . . .5-156 19. . . . . . . . . . . . . . . . .5-157 and 5-158 13. . . . . . . .5-158.1 33. . . . . . . . . . . . . . . .5-158.2 19. . . . . . . . . . . . . . .5-159 and 5-160 33. . . . .. . . .5-161 – 5-164 0. . . . . . .. . . .5-164.1 13. . . . . . . . . . . . . . . .5-164.2 blank 13. . . . . . . . . . .5-165 – 5-172 0. . . . . .. . . . .5-173 13. . . . . . . . . . . . . . . . .5-174 – 5-182 0. . . . . . . . . . .5-183 and 5-184 13. . . . . . .. .5-184.1 – 5-184.3 13. . . . . . .5-184.4 blank 8. . . . . . . . . . .



TM 55-1520-210-23-1

Change 42 G



5-185 – 5-189 0. . . . .. . . . . .5-190 blank 0. . . . . . . . . . . . .6-1 33. . . . . . . . . . . . . . . . . . . .6-2 – 6-6 0. . . . . . . . . . . . . . .6-7 37. . . . . . . . . . . . . . . . . . . .6-8 and 6-9 0. . . . . . . . . . . .6-10 37. . . . . . . . . . . . . . . . . . .6-11 – 6-13 0. . . . . . . .. . . . .6-14 37. . . . . . . . . . . . . . . . . .6-15 – 6-17 0. . . . . . . . . . . . .6-18 and 6-19 22. . . . . . . . . .6-20 1. . . . . . . . . . . . . . . . . .6-21 0. . . . . . . . . . . . . . . . . .6-22 37. . . . . . . . . . . . . . . . . .6-23 42. . . . . . . . . . . . . . . . . .6-24 13. . . . . . . . . . . . . . . . . . .6-25 37. . . . . . . . . . . . . . . . . .6-26 – 6-28 0. . . . . . . . . . . . .6-29 and 6-30 31. . . . . . . . . . .6-30.1 13. . . . . . . . . . . . . . . .6-30.2 blank 13. . . . . . . . . . . .6-31 and 6-32 13. . . . . . .. . . .6-33 and 6-34 0. . . . . . . . . . .6-34.1 22. . . . . . . . . . . . . . . . .6-34.2 blank 22. . . . . . . . . . . .6-35 13. . . . . . . . . . . . . . . . . .6-36 22. . . . . . . . . . . . . . . . . .6-37 33. . . . . . . . . . . . . . . . . .6-38 and 6-39 19. . . . . . . . . . .6-40 – 6-43 37. . . . . . . . . . . . .6-44 42. . . . . . . . . . . . . . . . . .6-44.1 – 6-44.4 42. . . . . . . . .6-44.5 31. . . . . . . . . . . . . . . . .6-44.6 blank 31. . . . . . . . . . . . . . . . . .6-45 and 6-46 0. . . . . . . . . . .6-47 22. . . . . . . . . . . . . . . . . . .6-48 37. . . . . . . . . . . . . . . . . . .6-49 42. . . . . . . . . . . . . . . . . .6-50 and 6-51 0. . . . . . . . . . .6-52 33. . . . . . . . . . . . . . . . . .6-53 13. . . . . . . . . . . . . . . . . .6-54 0. . . . . . . . . . . . . . . . . .6-55 19. . . . . . . . . . . . . . . . . .6-56 and 6-57 24. . . . . . .. . . .6-58 13. . . . . . . . . . . . . . . . . .6-58.1 13. . . . . . . . . . . . . . . . .6-58.2 blank 13. . . . . . . . . . . . . . . . . .6-59 19. . . . . . . . . . . . . . . . . .6-60 33. . . . . . . . . . . . . . . . . .6-60.1 42. . . . . . . . . . . . . . . .6-60.2 blank 19. . . . . . . . . . . .6-61 0. . . . . . . . . . . . . . . . . . .6-62 37. . . . . . . . . . . . . . . . . .

6-63 – 6-65 0. . . . . . . . . . . . .6-66 37. . . . . . . . . . . . . . . . . . .6-67 19. . . . . . . . . . . . . . . . . .6-68 – 6-70 0. . . . . . . . . . . .6-71 19. . . . . . . . . . . . . . . . . . .6-72 37. . . . . . . . . . . . . . . . . . .6-73 – 6-75 22. . . . . . . . . . . .6-76 0. . . . . . . . . . . . . . . . . . .6-77 22. . . . . . . . . . . . . . . . . . .6-78 0. . . . . . . . . . . . . . . . . . .6-79 22. . . . . . . . . . . . . . . . . . .6-80 37. . . . . . . . . . . . . . . . . .6-81 22. . . . . . . . . . . . . . . . . . .6-82 37. . . . . . . . . . . . . . . . . .6-83 22. . . . . . . . . . . . . . . . . .6-84 37. . . . . . . . . . . . . . . . . .6-84.1 24. . . . . . . . . . . . . . . .6-84.2 22. . . . . . . . . . . . . . . . .6-85 24. . . . . . . . . . . . . . . . . .6-86 22. . . . . . . . . . . . . . . . . . .6-87 37. . . . . . . . . . . . . . . . . .6-88 22. . . . . . . . . . . . . . . . . .6-89 0. . . . . . . . . . . . . . . . . .6-90 and 6-91 42. . . . . . . . . . . . . . . . . .6-92 0. . . . . . . . . . . . . . . . . . .6-93 and 6-94 . . . . . . . 376-95 22. . . . . . . . . . . . . . . . . .. 6-96 and 6-97 37. . . . . . . . . . .6-98 19. . . . . . . . . . . . . . . . . . .6-99 and 6-100 33. . . . . .. . . .6-101 22. . . . . . . . . . . . . . . . .6-102 42. . . . . . . . . . . . . . . . .6-103 and 6-104 24. . .. . . . .6-105 19. . . . . . . . . . . . . . . . .6-106 39. . . . . . . . . . . . . . . . .6-106.1 . . . . . . . . . . . . . . 396-106.2 blank 39. . . . . . . . . . .6-107 0. . . . . . . . . . . . . . . . .6-108 19. . . . . . . . . . . . . . . . .6-109 and 6-110 0. . . . . . . . .6-111 12. . . . . . . . . . . . . . . . .6-112 13. . . . . . . . . . . . . . . . .6-113 37. . . . . . . . . . . . . . . . .6-114 0. . . . . . . . . . . . . . . . . .6-115 and 6-116 37. . . . . .. . .6-116.1 24. . . . . . . . . . . . . . .6-116.2 37. . . . . . . . . . . . . . . .6-116.3 33. . . . . . . . . . . . . . . .6-116.4 37. . . . . . . . . . . . . . . .6-116.5 42. . . . . . . . . . . . . . . . .6-116.6 131. . . . . . . . . . . . . . . .6-117 – 6-121 0. . . . . . . . . . .


6-122 . . . . . . . . . . . . . . . . 33


TM 55-1520-210-23-1

H Change 42



6-123 0. . . . . . . . . . . . . . . . .6-124 22. . . . . . . . . . . . . . . . .6-125 – 6-127 24. . . . . . . . .. .6-128 37. . . . . . . . . . . . . . . .6-128.1 23. . . . . . . . . . . . . . . .6-128.2 blank 0. . . .. . . . . . . .6-129 37. . . . . . . . . . . . . . . . .6-130 21. . . . . . . . . . . . . . . . .6-131 and 6-132 0. . . . . . .. . .6-133 37. . . . . . . . . . . . . . . . .6-134 0. . . . . . . . . . . . . . . . .6-135 13. . . . . . . . . . . . . . . . .6-136 0. . . . . . . . . . . . . . . . . .6-137 37. . . . . . . . . . . . . . . . .6-138 42. . . . . . . . . . . . . . .6-138.1 42. . . . . . . . . . . . . . . .6-138.2 blank 21. . . . . . . . . .

6-160 0. . . . . . . . . . . . . . . . .6-161 37. . . . . . . . . . . . . . . . .6-162 22. . . . . . . . . . . . . . . . .6-163 24. . . . . . . . . . . . . . . . .6-164 22. . . . . . . . . . . . . . . .6-165 41. . . . . . . . . . . . . . . . .6-166 42. . . . . . . . . . . . . . . . .6-166.1 37. . . . . . . . . . . . . . . .6-166.2 33. . . . . . . . . . . . . . .6-166.3 and 6-166.4 41. . . . .6-166.5 42. . . . . . . . . . . . . . . .6-166.6 blank 41. . . . . .. . . . .6-167 31. . . . . . . . . . . . . . . . .6-168 and 6-169 19. . . . . . . .6-170 22. . . . . . . . . . . . . . . . .6-171 13. . . . . . . . . . . . . . . .


6-138.3 . . . . . . . . . . . . . . . 426-138.4 blank . . . . . . . . . . 426-139 . . . . . . . . . . . . . . . . 426-140 . . . . . . . . . . . . . . . . 426-141 . . . . . . . . . . . . . . . . 376-142 and 6-143 . . . . . . . . 426-144 . . . . . . . . . . . . . . . . 136-145 . . . . . . . . . . . . . . . . 06-146 . . . . . . . . . . . . . . . . 226-146.1 . . . . . . . . . . . . . . . 376-146.2 . . . . . . . . . . . . . . . 416-147 . . . . . . . . . . . . . . . . 426-148 . . . . . . . . . . . . . . . . 416-149 . . . . . . . . . . . . . . . . 376-150 . . . . . . . . . . . . . . . . 336-151 . . . . . . . . . . . . . . . . 246-152 . . . . . . . . . . . . . . . . 416-153 . . . . . . . . . . . . . . . . 376-154 . . . . . . . . . . . . . . . . 19

6-155 . . . . . . . . . . . . . . . . 226-156 – 6-158. . . . . . . . . . 426-158.1 . . . . . . . . . . . . . . . 246-158.2 blank . . . . . . . . . . 426-159 . . . . . . . . . . . . . . . . 33

6-172 . . . . . . . . . . . . . . . . 326-172.1 . . . . . . . . . . . . . . 376-172.2 . . . . . . . . . . . . . . 196-172.3 . . . . . . . . . . . . . . 246-172.4 blank . . . . . . . . . 196-173 and 6-174 . . . . . . . 19Index-1 – Index-3 . . . . . . 13Index-4 . . . . . . . . . . . . . . 19Index-5 . . . . . . . . . . . . . . 31Index-6 . . . . . . . . . . . . . . 37Index-7 and Index-8 . . . . 13Index-9 . . . . . . . . . . . . . . 19Index-10 – Index-12 . . . . 13Index-13 . . . . . . . . . . . . . 42Index-14 . . . . . . . . . . . . . 13


TM 55-1520-210-23-1

TECHNICAL MANUAL HEADQUARTERSDEPARTMENT OF THE ARMY

TM 55-1520-210-23-1 WASHINGTON, D.C., 30 September 1987

AVIATION AND INTERMEDIATEMAINTENANCE INSTRUCTIONS

ARMY MODEL UH-1H/V/EH-1H/X HELICOPTER

REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS

TABLE OF CONTENTS

PageCHAPTER 1 INTRODUCTION

Section I. Serving ............................................................................................................................................................................. 1-1II. Lubrication ....................................................................................................................................................................... 1-50III. Handling, Jacking, Mooring, Hoisting, and Sling Loading ....................................................................................... 1-54IV. Inspection Requirements .............................................................................................................................................. 1-66V. Overhaul and Retirement Schedule ............................................................................................................................ 1-110VI. Flight Safety Critical Aircraft Parts ............................................................................................................................... 1-115

CHAPTER 2 AIRFRAMESection I. Fuselage .......................................................................................................................................................................... 2-1

II. Tailboom .......................................................................................................................................................................... 2-193

CHAPTER 3 ALIGHTING GEARSection I. Landing Gear .................................................................................................................................................................. 3-1

II. Skids/Struts ..................................................................................................................................................................... 3-30III. Floats ............................................................................................................................................................................... 3-30IV. Skis ................................................................................................................................................................................... 3-30V. Brakes .............................................................................................................................................................................. 3-30

CHAPTER 4 POWER PLANTSection I. Power Plant ..................................................................................................................................................................... 4-1

II. Cooling System .............................................................................................................................................................. 4-13III. Air Induction System. ..................................................................................................................................................... 4-13IV. Exhaust System ............................................................................................................................................................. 4-42.7V. Oil System ....................................................................................................................................................................... 4-44VI. Ignition System ............................................................................................................................................................... 4-61VII. Power Controls ............................................................................................................................................................... 4-61VIII. Quick Change Assembly (AVIM) .................................................................................................................................. 4-86

Change 42 i

You can improve this manual. If you find any mistakes or if you know of a way to improve these procedures, please let us know. Mail your letter or DA Form 2028 (Recommended Changes to Publications and Blank Forms) located in theback of this manual, directly to: Commander, U.S. Army Aviation and Missile Command, ATTN: AMSAM-MMC-MA-NP,Redstone Arsenal, AL 35898-5000. A reply will be furnished to you. You may also provide DA Form 2028 informationto AMCOM via e-mail, fax, or the World Wide Web. Our fax number is: DSN 788-6546 or Commercial 256-842-6546.Our e-mail address is: [email protected]. Instructions for sending an electronic 2028 may be found at the backof this manual immediately preceding the hard copy 2028. For the World Wide Web use: https://amcom2028.redstone.army.mil.

Disribution Statement A. Approved for publi release; distribution is unlimited.


bailey-do

bailey-do

bailey-do

bailey-do

https://amcom2028.redstone.army.mil.

bailey-do

[email protected].

bailey-do

bailey-do

bailey-do

bailey-do

TM 55-1520-210-23-1

TABLE OF CONTENTS (Cont)

PageCHAPTER 5 ROTORS

Section I. Main Rotor System ........................................................................................................................................................ 5-1II. Main Rotor Hub .............................................................................................................................................................. 5-16III. Main Rotor Blades ......................................................................................................................................................... 5-38.1IV. Main Rotor Controls ....................................................................................................................................................... 5-53V. Tail Rotor System ........................................................................................................................................................... 5-104VI. Tail Rotor Hub and Blade Assembly ........................................................................................................................... 5-107VII. Tail Rotor Hub and Controls ......................................................................................................................................... 5-119VIII. Tail Rotor Blades ............................................................................................................................................................ 5-132IX. Tracking Procedures ..................................................................................................................................................... 5-138

CHAPTER 6 DRIVE TRAIN SYSTEMSection I. Main Driveshaft ............................................................................................................................................................... 6-1

II. Clutch ............................................................................................................................................................................... 6-29III. Main Transmission ......................................................................................................................................................... 6-29IV. Tail Rotor Driveshaft ...................................................................................................................................................... 6-116.2V. Intermediate Gearbox .................................................................................................................................................... 6-138VI. Tail Rotor Gearbox ......................................................................................................................................................... 6-147VII. Oil Systems ..................................................................................................................................................................... 6-167

CHAPTER 7 HYDRAULIC AND PNEUMATIC SYSTEMSSection I. Hydraulic System ........................................................................................................................................................... 7-1

II. Pneumatic System (Not Applicable) ............................................................................................................................ 7-81

CHAPTER 8 INSTRUMENT SYSTEMSSection I. Instrument Maintenance ............................................................................................................................................... 8-1

II. Engine Instruments ........................................................................................................................................................ 8-2III. Fight Instruments ........................................................................................................................................................... 8-22IV. Navigation lnstruments .................................................................................................................................................. 8-33V. Miscellaneous Instruments ........................................................................................................................................... 8-37VI. Instrument Panels .......................................................................................................................................................... 8-51

CHAPTER 9 ELECTRICAL SYSTEMSSection I. Direct Current Power Distribution System ................................................................................................................. 9-1

II. Alternating Current Power Distribution System ......................................................................................................... 9-41III. Starting System .............................................................................................................................................................. 9-52IV. Ignition System ............................................................................................................................................................... 9-54V. Lighting Provisions ......................................................................................................................................................... 9-56VI. Miscellaneous Equipment ............................................................................................................................................. 9-94

CHAPTER 10 FUEL SYSTEMSection I. Fuel Cells ......................................................................................................................................................................... 10-1

II. Fuel Systems .................................................................................................................................................................. 10-11

CHAPTER 11 FLIGHT CONTROLSSection I. Control Surfaces ............................................................................................................................................................. 11-1

II. Flight Control Components ........................................................................................................................................... 11-1

ii Change 8


TM 55-1520-210-23-1

TABLE OF CONTENTS (Cont)

Page

CHAPTERSection

12IIIIII

UTILITY SYSTEMSFire Detector System . . . . . . . . . . . . . . . . . . . . . . .Windshield Wiper System . . . . . . . . . . . . . . . . . . . . .Rear View Mirror . . . . . . . . . . . . . . . . . . . . . . . . .

12-112-512-20

CHAPTERSection

ENVIRONMENTAL CONTROL SYSTEMHeating System . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13I 13-1

CHAPTERSection

14III

HOIST AND WINCHESPersonnel Rescue Hoist . . . . . . . . . . . . . . . . . . . . . . . .Cargo Suspension Assembly . . . . . . . . . . . . . . . . . . . .

14-114-98

CHAPTER 15 AUXILIARY POWER PLANTS(Nonapplicable) . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 15-1

16-1

17-1

A-1

CHAPTER 16 MISSION EQUIPMENT . . . . .. . . . . . . . . . . . . . . . . . .

CHAPTER 17 EMERGENCY EQUIPMENT . . . . .. . . . . . . . . . . . . . . . . .

APPENDIX A REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

APPENDIXSection

BIIIIIIIV

MAINTENANCE ALLOCATION CHARTThree Levels of Maintenance Concept . . . . . . .. . . . . . . . . . . .Maintenance Allocation Chart . . . . . . . .. . . . . . . . . . . . . . .Tools and Test Equipment . . . . . . . . . . . . . . . . . . . . .Remarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B-1B-6B-77B-84

APPENDIX c AIRCRAFT INVENTORY MASTER GUIDE . . . .. . . . . . . . . . . . C-1

APPENDIX D ILLUSTRATED FIELD MANUFACTURE ITEMS LIST . . . . . . . . . . . . D-1

APPENDIXSection

EIIIIIIIV

STORAGE OF AIRCRAFTGeneral Information . . . . . . . . . . . . . . . . . . . . . . . . . . . .Flyable Storage . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . .Short Term Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Intermediate Storage . . . . . .. . . . . . . . . . . . . . . . . . . . .

E-1E-2.1E-3E-10.1

WIRING DIAGRAMS . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . F-1APPENDIX

INDEX

F

Index 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Change 8 iii/(iv blank)


TM 55-1520-210-23-1

Figure 4-9. Engine Air Inlet Filter Installation

4-16


TM 55-1520-210-23-1

b. Place retainer ring, with plate nuts forward, onbellmouth ahead of slip-joint flange. Insert bellmouth throughforward firewall from front, align to mating flange on engineinlet housing, and secure temporarily with V-band clamp at 30degree position. Be sure mounting hole and brackets for icedetector probe are at top.

NOTE

V-band coupling clamp shall be installedat the 3 o'clock position only. This willposition the 3.25 inch cutout in the V-band at the 6 o'clock position to assist inpreventing corrosion on mating surfacesof engine inlet housing.

c. Align bellmouth retaining ring to mounting holes offirewall and install the washers and retaining screws loosely.Torque V-band coupling nut 40 TO 50 inch-pounds, tap aroundthe clamp to seat it, retorque nut 40 TO 50 inch-pounds.Tighten the retaining screws.

d. Install lower sections of induction baffle, omittingupper section of forward baffle.

e. Install intake screen, without removable section, onend of bellmouth with screws.

f. Install main driveshaft (para. 6-23 as applicable).Install remaining section of intake screen and forward baffle.

g. Install and connect ice detector probe.

h. Install air inlet filters on fairing. Close engine cowlingand transmission fairing.

4-23. Air Inlet Filters. The three filter sections (7 and 8,figure 4-9) have metal frames and are secured in place bycowling fasteners or bolts. The top section is made up ofhinged panels with actuating levers, but in this installation thepanels are always secured in closed position by means ofmetal channels and links.

4-24. Removal- Air Inlet Filters.

a. Open transmission fairing.

b. Remove louver assembly if installed.

c. Remove the top section of induction baffle assembly(1, figure 4-9).

d. Remove each of two side sections of inlet filter, by

releasing fasteners or bolts at top and bottom edge.

e. Remove top filter by releasing fasteners or bolts alongforward and aft edges.

f. Protect induction area from entry of dirt and foreignobjects while filters are not in place.

4-25. Cleaning - Air Inlet Filters. Wash filters in a watersolution of detergent soap (C101). Flush from inside with clearwater. Allow filters to drain and air dry thoroughly. Do not usecompressed air drying.

4-26. Repair or Replacement - Air Inlet Filters. Replacefilter assemblies which cannot be made serviceable bycleaning and repair of edge seals by replacing foam tape.Replace loose, corroded, or missing rivets with friction-lockrivets. Apply sealant (C244) as described in para. 4-27c.

4-27. Installation - Air Inlet Filters.

NOTE

In areas where operational experienceshows filter blockage to be a problem, itis recommended that this inspection beperformed before each flight.

a. Clean engine air intake (para. 4-19).

b. Inspect engine air intake (para. 4-20).

c. Insure that the panels of the top filter assembly areheld securely in the closed position by channels installed onthe upper side over the two forward panel joints, and on theunder side by two links bolted to the aft pairs of actuatinglevers. Insure that sealing compound (C244) has been appliedto all of the rivets to prevent rivets from coming loose andcausing FOD to the engine. Sealant is to be applied to thebottom under side of the inlet screen panels. Sealant may beapplied to the adjacent screen mesh and should not extendfurther than 0.250 of an inch onto the screen. A strip of sealantlarger than 0.250 of an inch would begin to restrict the air flowthrough the screen.

Remove top filter assembly from aircraftwhen lockwiring channels to preventpossible FOD to engine.

Change 13 4-17


TM 55-1520-210-23-1

6 - 1 3 . M A I N D R I V E S H A F T P / N 2 0 5 - installed between an engine adapter on the engine0 4 0 - 0 0 4 . output shaft and the freewheel coupling on

transmission input drive quill, The main driveshaft 6-14. Description – Main Driveshaft P/N 205- has a flexible splined coupling on each end. Two040-004 (figure 6-9). The main driveshaft is coupling clamp sets, of split V-band type, hold mating

Figure 6-7. Transmission Positioning for Driveshaft Alignment

6 - 2


TM 55-1520-210-23-1

Figure 6-8. Tool Application — Use of Alignment Tool Set (T47)

6 - 3


TM 55-1520-210-23-1

c. Before installing main driveshaft, carefully wipe cleanthe area surrounding the driveshaft, especially the particleseparator, fifth mount beam, synchronized elevator tube, andcollective tube.

d. Position driveshaft assembly between engine adapter(41) and transmission input drive coupling.

e. Install clamp set (9) as follows:

(1) Wipe clamp set clean of all traces of lubricant.

(2) Check serial numbers on clamp set. Bothhalves of clamp set must have the same serial number.

(3) Position clamp set halves around maindriveshaft outer coupling (18) and mating adapter ontransmission input quill, check to make sure serial numbers onboth clamp halves are on the same side.

(4) Install two bolts (1) with heads facing indirection of shaft rotation, and with special washers (2) underbolt head, counter sink of washers toward bolt heads.

(5) Torque nuts (7) evenly to 100 to 130 inch-pounds. Keep gaps at ends of clamp halves even within 0.030inch of each other. Tap clamp set with a soft faced hammer toensure proper seating. Recheck torque. Install cotter pins (8).

f. Install clamp set (42) in the same manner outlined inthe preceding step and position clamp slots ninety degrees toclamp set (9).

g. Wipe any excess lubricant from main driveshaft.

h. After first ground runup, or first flight, followinginstallation of main driveshaft inspect areas around maindriveshaft and in line with couplings for evidence of lubricantslinging. If leakage of lubricant is evident, proceed as follows:

(1) Remove main driveshaft and install newpackings (11, 19, 26 and 37, figure 6-9).

(2) Inspect boots for wear and damage.

(3) Reinstall main driveshaft and repeat inspectionfor lubricant leakage.

6-24. Alignment - Main Driveshaft.

Premaintenance requirements for maindriveshaft alignment

Conditions Requirements

Model All

Part No. or Serial No. All

Special Tools (T47), (T51), (T53)

Test Equipment None

Support Equipment Dial Indicator

Minimum Personnel OneRequired

Consumable Materials None

Special Environmental A covered area not sus-Conditions ceptible to blowing dust or

sand.

a. Check alignment of the main driveshaft installationbetween the transmission input drive quill coupling and theengine output shaft adapter if any one of the followingconditions exist:

(1) Main driveshaft inspection reveals excessivewear of coupling spline or indications of excessive heatingduring operation.

(2) Major repairs or replacement of structuralcomponents has been made to either center fuselage or pylonsupport structure.

(3) Driveshaft misalignment is suspected for anyreason.

(4) Shims under engine mount deck fitting havebeen changed.

b. Remove the main driveshaft assembly, but leave theengine adapter (41, figure 6-9) installed in the end of theengine output shaft (paragraph 6-17).

c. Position transmission to best position, correspondingto operation as follows:

6-21


TM 55-1520-210-23-1

(1) Release fasteners attaching access doors topylon support and remove doors. Remove screws attachingupper access doors to pylon support and remove doors.

(2) Remove cotter pin, nut, and washer from bolt(6, figure 6-7) on lower end of link (5). Use hoist (800 poundcapacity) to raise pylon to position where lower bolt of lift linkcan be rotated freely. Replace bolt if binding occurs due tocorrosion or galling.

(3) Install four transmission leveling jacks (T51) (4)(two at each side) between transmission support case (1) andtop of pylon support.

Do not attempt to raise or lowertransmission with jacks only. Use asuitable hoist in conjunction with lacks.

NOTE

Use shim plates with jacks to obtainnecessary height.

(4) Operate hoist to raise transmission until bolt (6)can be rotated with fingers. Adjust jacks (4) to holdtransmission in this position with hoist slack. Take enoughslack from the hoist so that the full weight of the transmission isnot resting on the jacks and adjust jacks until all four cornersare within 0.020 inch of each other and bolt is free so that itcan be rotated with fingers.

NOTE

Ensure that lower lift link bolt (6) movesfreely throughout the remaining pylonpositioning procedures.

(5) Determine that transmission support pads aresymmetrically parallel with pylon support structures as follows:

(a) Use micrometer depth gage (2, figure6-7) to measure from the top surface of the support beam (3)mounting plates to the top of the pylon support. Take thismeasurement at each of the four mounts.

NOTE

Lower thickness of the fifth mountsupport beam (3) channel need not beconsidered, since it has beencompensated for by a difference in thefiller plates.

(b) Subtract thickness of support beam (3)from the measurements obtained at the two aft mounts. Thisaction will allow for thickness of the fifth mount support beamchannel, which covers the mounting plates at these two points.

All four measurements should be equal within 0.020 inch.

(c) When all four points can not be adjustedto the same dimension, take the average of the two front pointsand adjust the two rear points accordingly.

(d) Upon completion of transmission pylonpositioning, recheck bolt (6) to make sure that it can be rotatedfreely with the fingers.

d. Set the target plate of alignment tool set (T47) withthe arrow of the center disk indexed at 3.5 on the inner scale(figure 6-8). Secure by tightening the two washer-head screwsat back of plate.

e. Position the target plate of alignment tool set (T47) onthe transmission input quill coupling with the 1.75 index of theouter scale at the top vertical centerline (figure 6-8). Securewith coupling clamp set (figure 6-8).

NOTE

Both alignment checks (steps f. and g.)must be accomplished to determine ifalignment is correct.

f. Check horizontal and vertical alignment by insertingindex finger through access holes in the alignment gagehousing and pushing the plunger forward against the retractingspring tension and toward the target plate hole. When plungerenters hole in plate it can be detected by feel.

(1) To indicate correct alignment, largest diameterof plunger must enter hole in target plate.

(2) If misalignment is indicated, observe and noteamount and direction of such misalignment.

NOTE

No correction of misalignment should beattempted before completion ofangularity check outlined in the followingstep (g.). Shim requirements can be bestdetermined on a basis of both checks.

g. Perform angularity check as follows:

(1) Mount a dial indicator on the forward end of thealignment gage plunger as shown in figure 6-8.

(2) Position the dial indicator for contact at 2.5 inchradius (just inside the outer scale numbers) on target plate.Rotate the gage through a full turn to determine area of targetplate nearest the engine. This area should be found on theleft-side of the target plate between the 8 and 10 o'clockpositions. Zero the dial indicator in this area. Check run-outthrough a full turn of the gage. Runout must be

6-22 Change 37


TM 55-1520-210-23-1

within 0.016 inch maximum total indicator reading.

h. Make correction of engine alignment by use ofshims under engine mount deck fittings as required(figure 6-8). Refer to TM 55-2840-229-23 for enginevibe check.

(1) Loosen screws around intake bellmouth inforward firewall, and around attachment ring in rearfirewall, to allow engine to shift as necessary duringalignment.

(2) Shims under tripod inboard leg fittings P/N205-060-139-1 must not exceed 0.300 inch shim thick-ness. Shims under other deck fittings P/N 205-060-135-1 must not exceed 0.300 inch shim thickness.

(3) Torque fitting bolts (through engine deck) tostandard torque and repeat alignment and angularitychecks after any change of shims.

i. When alignment is correct, remove tool set(T47) and jacks (T51). Retighten screws aroundbellmouth, and firewalls, and around attaching ring inrear of firewall as necessary.

j. Install nut (8) and washer (7) on lower bolt (6,Figure 6-7) of lift link (5). Torque nut 480 to 600 inch-pounds (40 to 50 feet-pounds) and secure with cotterpin (9). Install access doors on pylon island structure.

k. Install main driveshaft (paragraph 6-23).

Change 42 6-23

(1) When installing the fifth-mount bolt, if thebolt inters the transmission support beam at an up-ward or downward angle, add or subtract shims tothe fifth-mount until the bolt enters the transmissionsupport beam on a horizontal plane, this procedurewill eliminate a lot of engine movement and shimmingto obtain the engine alignment and run-out.

(2) Remove all the shims from the engine deckfittings, (except for .026 from rom the tripod centerleg), before installing the engine.

(3) Install the engine.

(4) Install the engine alignment tool to the engineand to the transmission input drive (quill). Each shimequals to .003 in thickness and each .009 of shim thick-ness equals 1 degree on the run-out. Example: 5 degreeson the run-out equals 15 shims, which equal to .045 ofshim thickness.

(5) If shims are added to the monopod, theengine nose will move up. If shims are subtractedfrom the monopod, the engine nose will move down.If shims are added to the monopod, the engine run-out will increase to the negative at 12 o'clock andthe positive at 6 o'clock. If shims are subtracted fromthe monopod, the engine run-out will increase to thenegative at 6 o'clock and the positive at 12 o'clock.

(6) Left front leg of the tripod - if shims areadded, the engine moves minutely to the left; how-ever, the run-out will change quite a bit towards9 o'clock depending on the amount of shims added.There will be more minus towards 9 o'clock andmore plus towards 3 o'clock on the run-out.

(7) Left rear leg of the tripod - rolls the enginedown and right towards 5 o'clock, if shims are added;however, there is a very minute change on the run-out towards the direction of movement.

(8) Center leg of the tripod - if shims are addedthe engine moves to the left towards 9 o'clock, ifshims are subtracted, the engine moves to the righttowards 3 o'clock with a very minute change on the run-out towards either direction.

(9) Front right leg of the bipod - if shims areadded, the engine will move minutely towards theright; however the engine alignment will changetowards the minus at 3 o'clock and the plus towards9 o'clock.

(10) Right rear leg of the bipod - if shims areadded, the engine rolls down and left towards7 o'clock with a minute change on the run-outtowards the direction of movements.

(11) The left rear leg of the tripod and right rearleg of the bipod together - if shims are added equallyto both legs, the engine nose moves straight downtowards 6 o'clock. The run-out will change minutelytowards the direction of movement to the minus.


bailey-do

bailey-do

bailey-do

bailey-do

bailey-do

bailey-do

bailey-do

bailey-do

TM 55-1520-210-23-1

6-24.1. MAIN DRIVESHAFT (Flexible Plate)SKCP2281-103.

6-24.2. Description — Main Driveshaft P/NSKCP2281-103.

a. A main driveshaft (see figure 6-12.1) withflexible plate couplings is installed between an adapteron engine output and the freewheel unit ontransmission input drive quill. Two coupling clampsets, of split v-band type, hold mating curvic-splinedfaces of end fittings in secure contact,

b. Flexibility of shaft is provided by rectangularplates four in each coupling. Each plate flexesproviding both angular misalignment and lengthchanges to accommodate movement of transmission onpylon mounts. Each coupling can be considered atruss-work, in which torque loads are carried as axialloads in straight members of each plate.

c. A fail-safe feature exists which enablesuninterrupted drive of the shaft after a failure hasoccurred in one of the dual load paths provided by theplate couplings. In normal operation a radial clearanceexists between center shaft internal diameter and theinternal protruding hub of the end fitting (see figure6.12.1 ). Upon the unlikely event of a plate failure thecenter shaft shifts contacting the hub surface whichrestores the load balance, contains the whirling partsand restores stable operation. The off-center operationof center shaft is sufficient to cause a noticeableunbalance which signals that a partial failure hasoccurred and fail-safe mode is in operation with lastremaining load path.

d. The shaft is dynamically balanced at time ofmanufacture by the use of washer(s) and screw(s)which are used as balance weights. These weightsmay be found inside the shaft end fittings. To assurescrews are securely fastened a high grade ofadhesive is used on the threads. Do not attempt toturn screws as breakage may result due to highlockage force of the adhesive.

6-24.3. Removal — Main Driveshaft P/NSKCP2281-103.

a. Open transmission fairing.

b. Remove air inlet filters (paragraph 4-24).

c. Remove induction baffle upper panel by releas-ing fasteners.

d. Remove upper half of particle separator.

e. Remove coupling clamps at each end of maindrive shaft, keep clamps together as matched sets after

f.

removal.

WARNING

Compressionnecessary to

of shaft is usuallyclear the engine adapter

and transmission freewheeling unit.

DO NOT APPLY ANY TOOLSCLAMPS TO COUPLING PLATES.

OR

To prevent critical damage to platesand/or shaft, locally obtain and maketwo installation clamp aids. Refer tofigure 6-12.2.

Position two installation clamp aids over boltheads located on the arms of the end fittings (seefigure 6-12.3). Tighten clamps to allow removal ofshaft. Remove shaft assembly, remove clamp aids.

g. To remove engine shaft adapter, removeIockwire, retaining bolt and key washer. Pull adapterout of engine output shaft.

6-24.4. Cleaning — Main Driveshaft P/NSKCP2281-103.

a. Clean shaft assembly, adapter, and attachingparts with dry cleaning solvent (C261) or Methyl-Ethyl-Ketone (C177).

b. Dry with filtered compressed air or clean cloth.

6-24.5. Inspection and Repair — Main DriveshaftP/N SKCP2281-103.

CAUTION

Do not attempt to loosen or tighten anyhardware. Any reason for necessarypart removal is cause for shaftreplacement.

6-24 Change 13


TM 55-1520-210-23-1 - Regulations.gov

Documents

Transcript of TM 55-1520-210-23-1 - Regulations.gov