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TECHNICAL MANUAL

AVIATION UNIT AND INTERMEDIATE

MAINTENANCE INSTRUCTIONSARMY MODEL UH-1H/V/EH-1H/X

HELICOPTERS

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

HEADQUARTERS, DEPARTMENT OF THE ARMY30 SEPTEMBER 1987

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Personnel performing operations, procedures,

and practices which are included or implied in thistechnical 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 emphasize

important 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 plugs

are 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 handling

leaking 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 through

the 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 with

clear 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 apporopriate

respirator. When fluid is decomposed by heating, toxic gases are released.

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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 from

contact 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.

ARMAMENT

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 remain

clear 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. The

helicopter 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.

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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 of

the type of plating, all tools must be serviceable and free of chipping.

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CHANGE

NO. 43

C43

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HEADQUARTERSDEPARTMENT OF THE ARMY

WASHINGTON, D.C., 22 December 2003

Aviation Unit and Intermediate

Maintenance 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 H

1-17 through 1-22 1-17 through 1-22


1-45 and 1-46 1-45 and 1-46

1-111 and 1-112 1-111 and 1-1122-149 and 2-150 2-149 and 2-150

2-154.5 and 2-154.6 2-154.5 and 2-154.6

5-33 and 5-34 5-33 and 5-34

5-83 and 5-84 5-83 and 5-84


6-138.1/(6-138.2 blank) 6-138.1 /(6-138.2 blank)

6-165 and 6-166 6-165 and 6-166

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

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By Order of the Secretary of the Army:

Official:

PETER J. SCHOOMAKER

General, United States Army

Chief of Staff

JOEL B. HUDSON

Administrative Assistant to theSecretary of the Army

0331605

TM 55-1520-210-23-1C43

DISTRIBUTION:

To be distributed in accordance with initial distribution number (IDN) 311408, requirements for TM 55-1520-210-23-1.

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CHANGE

NO. 42

C 42

TM 55-1520-210-23-1


WASHINGTON, D.C., 14 April 2003

AviationUnitandIntermediate


ARMYMODEL UH-1H/V/EH-1H/XHELICOPTERS

DISTRIBUTIONSTATEMENTA: Approved forpublic release; distribution is unlimited.

TM 55-1520-210-23-1, dated30 September 1987, is changed as follows:1. Removeandinsertpages as indicatedbelow. Neworchangedtextmaterial is indicatedbya verticalbar

in the margin. An illustrationchange is indicated bya miniature pointing hand.



P-1 and P-2 P-1 and P-2

i and ii i and ii

1-21 and 1-22 1-21 and 1-22

1-30.3 and 1-30.4 1-30.3 and 1-30.4

1-37 and 1-38 1-37 and 1-381-105 and 1-106 1-105 and 1-106

1-111 and 1-112 1-111 and 1-112

2-119 and 2-120 2-119 and 2-120

2-154.5/(2-154.6 blank) 2-154.5 and 2-154.6

3-14.1 and 3-14.2 3-14.1 and 3-14.2

4-42.3 and 4-42.4 4-42.3 and 4-42.4


4-57 and 4-58 4-57 and 4-58

4-73 and 4-74 4-73 and 4-74

4-93 and 4-94 4-93 and 4-94

5-9 and 5-10 5-9 and 5-10

5-15 and 5-16 5-15 and 5-165-25 through 5-28 5-25 through 5-28

5-33 and 5-34 5-33 and 5-34

5-67 and 5-68 5-67 and 5-68

5-68.1 and 5-68.2 5-68.1 and 5-68.2

5-69 and 5-70 5-69 and 5-70

5-85 and 5-86 5-85 and 5-86

5-91 and 5-92 5-91 and 5-92

5-103 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

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To be distributed in accordance with Initial Distribution Number (IDN) 311408, requirements for

Distribution:

Secretary of the Army

Administrative Assistant to the

JOEL B. HUDSON

Chief of StaffOfficial:


ERIC K. SHINSEKI



TM 55-1520-210-23-1

C 42


6-43 and 6-44 6-43 and 6-446-44.1 through 6-44.4 6-44.1 through 6-44.4

6-49 and 6-50 6-49 and 6-50

6-60.1/(6.60.2 blank) 6-60.1/(6.60.2 blank)


6-101 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 6-138

6-138.1 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 6-140

6-147 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

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CHANGE

NO. 41

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URGENT

URGENT


WASHINGTON, D.C., 1 J uly 2002

AviationUnitandIntermediate


ARMYMODEL UH-1H/V/EH-1H/XHELICOPTERS

DISTRIBUTIONSTATEMENTA: Approved forpublic release; distribution is unlimited.

TM 55-1520-210-23-1, dated30 September 1987, is changed as follows:1. Removeandinsertpages as indicatedbelow. Neworchangedtextmaterial is indicatedbya verticalbar

in the margin. An illustrationchange is indicated bya miniature pointing hand.



1-109 through 1-114 1-109 through 1-114

6-137 through 6-140 6-137 through 6-140

6-146.1 and 6-146.2 6-146.1 and 6-146.2

6-147/(6-148 blank) 6-147 and 6-148

6-151 and 6-152 6-151 and 6-1526-165 and 6-166 6-165 and 6-166

6-166.3 through6-166.5/(6-166.6blank) 6-166.3 through6-166.5/(6-166.6blank)

2. Pages 1-111 through 1-114correct errors associatedwith urgentchange 40.



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

ERIC K. SHINSEKIGeneral, United States Army


JOEL B. HUDSON Administrative Assistant to the

Secretary of the Army0216807

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URGENT

URGENT

TM 55--1520--210--23--1C 40

CHANGE HEADQUARTERSDEPARTMENT OF THE ARMY

NO. 40 WASHINGTON, D.C., 19 April 2002

Aviation UnitandIntermediateMaintenance Instructions

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

HELICOPTERS

DISTRIBUTION STATEMENT A: Approvedfor public release; distribution is unlimited

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

1. Remove and insert pages as indicated below. New or changed textmaterial is indicated bya verticalbar inthe margin. An illustrationchange is indicated bya miniature pointing hand.

Remove pages Insertpages

A through H A through H1--113 and 1--114 1--113 and 1--1146--137 and 6--138 6--137 and 6--1386--147/(6--148blank) 6--147/(6--148blank)

2. Retainthis sheetin frontof manual for referencepurposes.


DISTRIBUTION To be distributed inaccordance with Initial Distribution Number 311408, requirements for TM 55--1520--210--23--1





0210202

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CHANGE

NO. 39 }

C39

TM 55-1520-210-23-1URGENT

URGENT


WASHINGTON, D.C., 15 October 2001




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





1-111 through 1-114 1-111 through 1-114

5-54.45 and 5-54.46 5-54.45 and 5-54.46

5-65 and 5-66 5-65 and 5-66

5-72.5 and 5-72.6 5-72.5 and 5-72.6

5-87 and 5-88 5-87 and 5-88

5-101 through 5-104 5-101 through 5-104

6-105 and 6-106 6-105 and 6-106

– – – – – – 6-106.1/(6-106.2 blank)

2. Retain these sheets in front of manual for reference purposes.


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

ERC K. SHINSEKI

General, United States ArmyChief of Staff

Official:

JOEL B. HUDSON

Administrative Assistant to theSecretary of the Army

0127504

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URGENT

URGENT

TM 55-1520-210-23-1C 38


NO. 38 WASHINGTON, D.C., 6 J uly 2001

AviationUnitand IntermediateMaintenance Instructions

ARMYMODEL UH--1H/V/EH--1H/XHELICOPTERS

DISTRIBUTIONSTATEMENT A: Approved for public release; distribution is unlimited

TM 55-1520-210-23-1, 30 September1987, is changedas follows:

1. Remove and insert pages as indicatedbelow. New orchanged text material is indicatedby a verticalbar inthe margin. An illustrationchange is indicated bya miniature pointing hand.


A through H A through HP--1 and P--2 P--1 and P--21--113 and 1--114 1--113 and 1--1142--153and2--154 2--153through2--154.5/(2--154.6blank)

2. Retain this sheet in front of manual for referencepurposes.



Chief of StaffOFFICIAL:

JOEL B. HUDSON

DISTRIBUTIONTo be distributed in accordance with Initial Distribution Number 311408, requirements for TM 55-1520-210-23-1.


Secretary of the Army 0117207

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C37


NO. 37 WASHINGTON, D.C. 15 January 2001

Aviation Unit And Intermediate





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


A through G / (H blank) A through Hi and ii i and ii

1-1 and 1-2 1-1 and 1-2



1-30.1 through 1-30.4 1-30.1 through 1-30.4

1-95 and 1-96 1-95 and 1-96

1-105 through 1-110 1-105 through 1-110

2-1 and 2-2 2-1 and 2-2

2-31 and 2-32 2-31 and 2-32

2-53 and 2-54 2-53 and 2-54

2-59 and 2-60 2-59 and 2-60


2-73 and 2-74 2-73 and 2-74

2-79 and 2-80 2-79 and 2-80

2-83 through 2-88.2 2-83 through 2-88.2


2-103 and 2-104 2-103 and 2-104

2-107 and 2-108 2-107 and 2-108

2-115 and 2-116 2-115 and 2-116

2-119 and 2-120 2-119 and 2-120

2-130.1 / (2-130.2 blank) 2-130.1 / (2-130.2 blank)

2-147 through 2-150 2-147 through 2-150

2-153 and 2-154 2-153 and 2-154

2-157 and 2-158 2-157 and 2-158

2-181 and 2-182 2-181 and 2-182

2-183 through 2-188 2-183 through 2-188

2-197 and 2-198 2-197 and 2-198

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2-207 and 2-208 2-207 and 2-208

2-227 through 2-230 2-227 through 2-230

2-247 and 2-248 2-247 and 2-248

2-255 and 2-256 2-255 and 2-256


3-7 and 3-8 3-7 and 3-8

3-14.1 and 3-14.2 3-14.1 and 3-14.2

3-15 and 3-16 3-15 and 3-16

4-13 and 4-14 4-13 and 4-14

4-17 and 4-18 4-17 and 4-18

4-23 and 4-24 4-23 and 4-24

4-29 and 4-30 4-29 and 4-30

4-35 and 4-36 4-35 and 4-36

4-42.1 through 4-42.4 4-42.1 through 4-42.4

4-42.5 through / (4-42.8 blank) 4-42.5 through / (4-42.8 blank)


4-47 and 4-48 4-47 and 4-48

4-53 and 4-54 4-53 and 4-544-57 through 4-60.4 4-57 through 4-60.4

4-60.4.1 / (4-60.4.2 blank)

4-60.5 through 4-60.8 4-60.5 through 4-60.12

4-67 and 4-68 4-67 and 4-68


4-79 and 4-80 4-79 and 4-80

4-87 and 4-88 4-87 and 4-88

4-107 and 4-108 4-107 and 4-108

5-21 and 5-22 5-21 and 5-22

5-29 and 5-30 5-29 and 5-30

5-32.1 and 5-32.2 5-32.1 and 5-32.2

5-39 and 5-40 5-39 and 5-405-40.1 / (5-40.2 blank) 5-40.1 / (5-40.2 blank)


5-54.45 and 5-54.46 5-54.45 and 5-54.46

5-54.49 / (5-54.50 blank) 5-54.49 / (5-54.50 blank)

5-68.1 and 5-68.2 5-68.1 and 5-68.2

5-71 and 5-72 5-71 and 5-72

5-73 and 5-74 5-73 and 5-74

5-79 and 5-80 5-79 and 5-80

5-83 and 5-84 5-83 and 5-84

5-93 and 5-94 5-93 and 5-94

5-99 through 5-102 5-99 through 5-102

5-107 through 5-110 5-107 through 5-110

5-121 and 5-122 5-121 and 5-122

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5-124.1 / (5-124.2 blank) 5-124.1 / (5-124.2 blank)

5-131 and 5-132 5-131 and 5-132


6-13 and 6-14 6-13 and 6-14

6-21 and 6-22 6-21 and 6-22

6-25 and 6-26 6-25 and 6-26

6-39 and 6-44 6-39 and 6-44

6-44.1 and 6-44.2 6-44.1 and 6-44.2

6-47 and 6-48 6-47 and 6-48

6-60.1 / (6-60.2 blank) 6-60.1 / (6-60.2 blank)

6-61 and 6-62 6-61 and 6-62

6-65 and 6-66 6-65 and 6-66

6-71 and 6-72 6-71 and 6-72


6-87 and 6-88 6-87 and 6-88


6-113 through 6-116.4 6-113 through 6-116.4

6-127 and 6-128 6-127 and 6-128

6-129 and 6-130 6-129 and 6-130

6-133 and 6-134 6-133 and 6-134

6-137 and 6-138 6-137 and 6-138

6-138.1 / (6-138.2 blank) 6-138.1 / (6-138.2 blank)

6-141 and 6-142 6-141 and 6-142

6-146.1 and 6-146.2 6-146.1 and 6-146.2

6-147 / (6-148 blank) 6-147 / (6-148 blank)

6-149 and 6-150 6-149 and 6-150

6-153 and 6-154 6-153 and 6-154

6-161 and 6-162 6-161 and 6-162

6-165 through 6-166.2 6-165 through 6-166.2

6-171 through 6-172.2 6-171 through 6-172.2Index-5 and Index-6 Index-5 and Index-6


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C37


ERIC K. SHINSEKIGeneral, United States Army Chief of Staff

OFFICIAL:



DISTRIBUTION:To be distributed in accordance with Initial Distribution Number 311408, requirements for TM 55-1520-210-23-1.

SIGN

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URGENT

TM 55- 1520- 210- 23- 1C36

CHANGE

NO. 36

HEADQUARTERS

DEPARTMENT OF THE ARMY

WASHI NGTON, D. C. , 19 Nov 1999

Avi ati on Unit and I ntermedi ateMai ntenance I nstructi ons

ARMY MODEL UH- 1 H/ V/ EH-1 H/ XHELI COPTERS

DI STRI BUTI ON STATEMENT A: Approved for publ i c r el ease; di str i buti on i s unl i mi ted

TM 55- 1520- 21O- 23- 1, 30 September 1987, i s changed as f ol l ows:

I . Remove and i nsert pages as i ndi cated bel ow. New or changed text materi al i s i ndi cated by a verti cal bar i n

the margin. An i l l ustrati on change i s i ndi cated by a mi ni ature pointi ng hand.

Remove pages I nsert pages

P- l and P-21-115 and 1-1161-123 and 1-1244-45 and 4- 46

A through GP-1 and P- 21-115 and 1-1161-123 and 1- 1244-45 and 4-464- 46. 1/ (4- 46. 2 bl ank)

2. Retai n this sheet i n front of manual for reference purposes.

By Order of the Secr etary of the Army:

ERI C K. SHI NSEKIGene r a l , Un i t e d St a t e s Ar my

Ch i e f o f St a f f

Admi ni strati ve Assi stant to theSecretary of the Army

9931901

DI STRI BUTI ONTo be di stri buted i n accordance wi th Ini ti al Di stri buti on Number 311408, requi rements f or TM 55-1520-210-23-1

URGENT

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URGENTTM 55-1520-210-23-1

C35

CHANGE

NO. 35


WASHINGTON, D.C., 22 January 1998

Aviation Unit and IntermediateMaintenance Instructions



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

1. Remove and insert pages as indicated below. New or changed text material is indited by

vertical bar in the margin. An illustration change is indicated by a miniature pointing hand.


i and ii i and ii

1-111 and 1-112 1-111 and 1-112




Secretary of the Army03861

DENNIS J. REIMERGeneral, United States Arm

Chief of Staff

DISTRIBUTION:To be distributed in accordance with Initial Distribution Number 1408, requirements for TM 55-

1520-210-23-1.

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URGENT

TM 55-1520-210-23-1C 34


NO. 34 WASHINGTON, D.C., 7 October 1996


ARMY MODEL UH-1HNIEH-1H/XHELICOPTERS


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

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


1-109 and 1-110 1-109 and 1-110

5-135 and 5-136 5-135 and 5-136

5-136.1/(5-136.2 blank)

6-39 and 6-40 6-39 and 6-40



DENNIS J. REIMERGeneral, United States Army

Official: Chief of Staff

JOEL B. HUDSONAdministrative Assistant to the


DISTRIBUTION:

To be distributed in accordance with DA Form 12-31-E, block no. 1408, requirements for TM 55-1520-210-23-1.

SIGN

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TM 55-1520-210-23-1C33


NO. 33 WASHINGTON, D.C., 28 September 1996


ARMY MODEL UH-1HNIEH-1HIXHELICOPTERS



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


i and ii i and ii

1-5 and 1-6 1-5 and 1-61-15 and 1-16 1-15 and 1-161-25 and 1-26 1-25 and 1-261-30.3 and 1-30.4 1-30.3 and 1-30.41-51 and 1-52 1-51 and 1-521-67 and 1-68 1-67 and 1-68

1-68.1 and 1-68.21-97 and 1-98 1-97 and 1-981-107 and 1-108 1-107 and 1-1081-111 and 1-112 1-111 and 1-1122-33 and 2-34 2-33 and 2-342-43 and 2-44 2-43 and 2-44

2-44.1/(2-44.2 blank)

2-45 and 2-46 2-45 and 2-462-67 through 2-70 2-67 through 2-702-91 and 2-92 2-91 and 2-922-101 2-101/(2-102 blank)2-109 2-109/(2-110 blank)2-115 and 2-116 2-115 and 2-1162-119 and 2-120 2-119 and 2-1202-120.1 and 2-120.2 2-120.1 and 2-120.22-121 through 2-124 2-121 through 2-1242-131 and 2-132 2-131 and 2-1322-151 through 2-154 2-151 through 2-1542-185 and 2-186 2-185 and 2-1862-197 and 2-198 2-197 and 2-1982-207 through 2-210 2-207 through 2-2102-255 and 2-256 2-255 and 2-2563-14.1 and 3-14.2 3-14.1 and 3-14.24-9 and 4-10 4-9 and 4-104-13 and 4-14 4-13 and 4-144-42.3 and 4-42.4 4-42.3 and 4-42.4

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4-49 and 4-50 4-49 and 4-504-73 and 4-74 4-73 and 4-744-78.1/(4-78.2 blank) 4-78.1/(4-78.2 blank)4-85 and 4-86 4-85 and 4-864-93 and 4-94 4-93 and 4-944-97 and 4-98 4-97 and 4-985-9 and 5-10 5-9 and 5-105-40.1/(5-40.2 blank) 5-40.1/(5-40.2 blank)5-41 and 5-42 5-41 and 5-425-51 and 5-52 5-51 and 5-525-57 through 5-60 5-57 through 5-60

5-60.1/(5-60.2 blank)5-65 and 5-66 5-65 and 5-665-83 and 5-84 5-83 and 5-845-103 and 5-104 5-103 and 5-1045-121 and 5-122 5-121 and 5-1225-124.1/(5-124.2 blank) 5-124.1/(5-124.2 blank)5-147 through 5-150 5-147 through 5-150

5-158.1 and 5-158.2 5-158.1 and 5-158.25-159 and 5-160 5-159 and 5-1606-1 and 6-2 6-1 and 6-26-37 and 6-38 6-37 and 6-386-51 and 6-52 6-51 and 6-526-59 and 6-60 6-59 and 6-606-93 and 6-94 6-93 and 6-946-99 through 6-102 6-99 through 6-1026-115 and 6-116 6-115 and 6-1166-116.3 and 6-116.4 6-116.3 and 6-116.46-121 and 6-122 6-121 and 6-1226-128.11/(6-128.2 blank)6-129 and 6-130 6-129 and 6-130

6-141 and 6-142 6-141 and 6-1426-147 and 6-148 6-147/(6-148 blank)6-149 through 6-152 6-149 through 6-1526-159 and 6-160 6-159 and 6-1606-165 and 6-166 6-165 and 6-1666-166.1 and 6-166.2 6-166.1 and 6-166.2

Electronic 2028 Instructions


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TM 55-1520-210-23-1C33






DISTRIBUTION:To be distributed in accordance with DA Form 12-31-E, block no. 1408, requirements for TM 55-1520-210-23-1.

SIGN

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URGENTTM 55-1520-210-23-1

C32


NO. 32 WASHINGTON, D.C., 12 August 1996



ARMY MODEL UH-1HNIEH-1H/XHELICOPTERS

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimitedTM 55-1520-210-23-1, 30 September 1987, is changed as follows:



1-99 and 1-100 1-99 and 1-100

5-109 and 5-110 5-109 and 5-110

5-135 and 5-136 5-135 and 5-136


By Order of the Secretary of the Army:DENNIS J. REIMER

General, United States Army Official: Chief of Staff




SIGN

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TM 55-1520-210-23-1C31

U R G E N T

CHANGE

NO. 31




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



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

Remove pages

i and ii1-105 through 1-110

4-13 and 4-144-43 and 4-44

4-60.1 through 4-60.7/(4-60.8 blank)4-97 and 4-985-91 and 5-925-103 and 5-1046-29 and 6-306-41 through 6-446-44.1 through 6-44.46-167 and 6-1686-171 and 6-172Index-5 and Index-6

Insert pages

i and ii1-105 through 1-110

1-115 through 1-125/(1-126 blank)4-13 and 4-144-43 and 4-444-44.1/(4-44.2 blank)4-60.1 through 4-60.84-97 and 4-985-91 and 5-925-103 and 5-1046-29 and 6-306-41 through 6-446-44.1 through 6-44.5/(6-44.6 blank)6-167 and 6-1686-171 and 6-172Index-5 and Index-6


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SIGN

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C 30

CHANGE

NO. 30


WASHINGTON, D.C., 31 July 1995


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





1-33 and 1-34 1-33 and 1-34

Index 5 and Index 6 Index 5 and Index 6



Acting Administrative Assistant to the


DENNIS J. REIMER

General, United States Amy Chief of Staff

DISTRIBUTION:

To be distributed in accordance with DA Form 12-31-E, block no. 1408, requirements for

TM 55-1520-210-23-1.

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URGENT

CHANGE

NO. 29

TM 55-1520-210-23-1

C 2 9


WASHINGTON, D. C., 12 December 1994



DISTRIBUTlON STATEMENT A: Approved for PUNIC release; distribution is unlimited.

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

1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical bar

in the margin. An illustration change is indicated by a miniature pointing hand.


1-109 and 1-110 1-109 and 1-110



GORDON R. SULLIVANGeneral, United States Army

Chief of Staff Official:



DISTRIBUTION:


TM 55-1520-210-23-1.

URGENT

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URGENTTM 55-1520-210-23-1

C 28

CHANGE

NO. 28

HEADQUARTERS


WASHINGTON, D.C., 23 September 1994



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

H E L l C O P T E R S


TM 55-1520-210-23-1,30 September 1994, is changed as follows

1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical bar

in the margin. An illustration change is indicated by a miniature pointing hand.

Remove pages

1-109 and 1-110

4-83 through 4-66

5-13 and 5-14

5-21 and 5-22

5-32.1 and 5-32.2

5-33 and 5-34

5-37 and 5-38

5-85 and 5-86

Insert pages

1-109 and 1-110

4-83 through 4-86

5-13 and 5-14

5-21 and 5-22

5-32.1 through 5-32.3/(5-32.4 blank)

5-33 and 5-34

5-37 and 5-38

5-85 and 5-86



Official:



GORDON R. SULLIVAN


Chief of Staff

0 6 7 5 4

DISTRIBUTION:


TM 55-1520-210-23-1.

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URGENTNOTICE : THIS CHANGE HAS BEEN PRINTED AND DISTRIBUTED OUT OF SEQUENCE. IT SHOULD

BE INSERTED IN THE MANUAL AND USED. UPON RECEIPT OF THE EARLIER SEQUENCED

CHANGE, ENSURE A MORE CURRENT CHANGE PAGE IS NOT REPLACED WITH A LESS CUR-

RENT PAGE.

TM 55-1520-210-23-1

C 27

CHANGE

NO. 27

HEADQUARTERS


WASHINGTON, D.C., 2 June 1993



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

HELICOPTERS



1. Remove and insert pages as indicated below. New or changed text material is

indicated by a vertical bar in the margin. An illustration change is indicated

by a miniature pointing hand.


1-99 and 1-100 1-99 and 1-100



Official:

MILTON H. HAMILTON



GORDON R. SULLIVAN


Chief of Staff

DISTRIBUTION:

To be distributed in accordance with DA Form 12-31-E, block no. 1408, require-

ments for TM 55-1520-210-23-1.

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URGENT

NOTICE: THIS CHANGE HAS BEEN PRINTED AND DISTRIBUTED OUT OF SEQUENCE. IT SHOULDBE INSERTED IN THE MANUAL AND USED. UPON RECEIPT OF THE EARLIER SEQUENCEDCHANGE ENSURE A MORE CURRENT CHANGE PAGE IS NOT REPLACED WITH A LESS CUR-

RENT PAGE.

CHANGE

NO. 26

TM 55-1520-210-23-1C 26






HELICOPTERS








i and ii i and ii

1-111 through 1-114 1-111 through 1-114



GORDON R. SULLIVAN


Chief of Staff

MILTON H. HAMILTON



DISTRIBUTION:To be distributed in accordance with DA Form 12-31-E, block no. 1408, require-

ments for TM 55-1520-210-23-1.

URGENT

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URGENTTM 55-1520-210-23-1

C 25

NOTICE: THIS CHANGE HAS BEEN PRINTED AND DISTRIBUTED OUT OF SEQUENCE. ITSHOULD BE INSERTED IN THE MANUAL AND USED. UPON RECEIPT OF THEEARLIER SEQUENCED CHANGE ENSURE A MORE CURRENT CHANGE PAGE IS NOTREPLACED WITH A LESS CURRENT PAGE.

C H A N G E

NO. 25





Army Model UH-1H/V/EH-1H/X

DISTRIBUTION STATEMENT A.

Helicopters

Approved for public release; distribution is unlimited

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



1-109 and 1-110 1-109 and 1-1101-111 and 1-112 1-111 and 1-1121-113 and 1-114 1-113 and 1-114

4-78.1/(4-78.2 Blank)4-79 and 4-80 4-79 and 4-802028’s and Envelopes 2028’s and Envelopes


URGENT

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TM 55-1520-210-23-1C 25


Official:

MILTON H. HAMILTON



GORDON R. SULLIVAN

General, United States Army Chief of Staff


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TM 55-1520-210-23-1

C 24

CHANGE

NO. 24

HEADQUARTERS


WASHINGTON, D.C., 30 NOVEMBER 1992




HELICOPTERS







1-5 through 1-10----

1-11 through 1-14

1-17 and 1-18

1-21 and 1-22

1-27 through 1-30

1-30.1 through 1-30.4

1-31 through 1-36

1-81 and 1-82

1-82.1 and 1-82.2

1-103 and 1-104

1-107 and 1-108

2-53 and 2-54

2-115 and 2-116

2-185 and 2-186

2-233 and 2-234

2-255 and 2-256

3-14.1/(3-14.2 blank)

3-15 and 3-16

4-42.1 and 4-42.2

4-42.4.1 and 4-42.4.2

4-42.5 and 4-42.6

4-53 through 4-56

4-57 through 4-60

4-60.1 through 4-60.64-71 and 4-72

4-97 and 4-98

5-38.1 and 5-38.2

5-53 and 5-54

1-5 through 1-10

1-10.1/(1-10.2 blank)

1-11 through 1-14

1-17 and 1-18

1-21 and 1-22

1-27 through 1-30

1-30.1 through 1-30.4

1-31 through 1-36

1-81 and 1-82

1-82.1 and 1-82.2

1-103 and 1-104

1-107 and 1-108

2-53 and 2-54

2-115 and 2-116

2-185 and 2-186

2-233 and 2-234

2-255 and 2-256

3-14.1 and 3-14.2

3-15 and 3-16

4-42.1 and 4-42.2

4-42.4.1 and 4-42.4.2

4-42.5 and 4-42.6

4-53 through 4-56

4-57 through 4-60

4-60.1 through 4-60.64-71 and 4-72

4-85 and 4-86

4-97 and 4-98

5-38.1 and 5-38.2

5-53 and 5-54

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C 24


5-65 and 5-66

5-81 and 5-82

5-121 and 5-122

5-127 and 5-128

5-130.1/(5-130.2 blank)

6-47 and 6-48

6-51 and 6-52

6-55 through 6-58

6-83 and 6-84

6-84.1 and 6-84.2

6-85 and 6-86

6-93 and 6-94

6-103 through 6-106

6-115 and 6-116

6-116.1 and 6-116.2

6-127 and 6-128

6-141 and 6-142

6-149 through 6-152----

6-159 and 6-160

6-163 and 6-164

6-167 and 6-168

6-171 and 6-172

6-172.1 through 6-172.3/

(6-172.4 blank)

5-65 and 5-66

5-81 and 5-82

5-121 and 5-122

5-127 and 5-128

5-130.1/(5-130.2 blank)

6-47 and 6-48

6-51 and 6-52

6-55 through 6-58

6-83 and 6-84

6-84.1 and 6-84.2

6-85 and 6-86

6-93 and 6-94

6-103 through 6-106

6-115 and 6-116

6-116.1 and 6-116.2

6-127 and 6-128

6-141 and 6-142

6-149 through 6-152

6-158.1/(6-158.2 blank)

6-159 and 6-160

6-163 and 6-164

6-167 and 6-168

6-171 and 6-1726-172.1 through 6-172.3/

(6-172.4 blank)


By Order of the Secretary of the Arrny:

Official:

Administrative-Assistant to the


GORDON R. SULLIVAN


Chief of Staff

07327

DISTRIBUTION:

To be distributed in accordance with DA Form 12-31-E, block no. 1408, require-

ments for TM 55-1520-210-23-1.

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URGENT

CHANGE

NO. 23

NOTICE: THIS CHANGE HAS BEEN PRINTED AND DISTRIBUTED OUT OF SEQUENCE. IT SHOULDBE INSERTED IN THE MANUAL AND USED. UPON RECEIPT OF THE EARLIER SEQUENCED

CHANGE ENSURE A MORE CURRENT CHANGE PAGE IS NOT REPLACED WITH A LESS CUR-

RENT PAGE.

TM 55-1520-210-23-1

C 23

HEADQUARTERS




MAINTENANCE INSTRUCTIONS


HELICOPTERS


1. Remove and insert pages as indicated below. New or changed text material

is indicated by a vertical bar in the margin. An illustration change is indicated


Remove pages

2-233 and 2-234- - - -

2-255 and 2-256

4-53 and 4-54

5-81 and 5-82

6-127 and 6-128- - - -

6-141 and 6-142

6-165 and 6-166

2. Retain this sheet in


Insert pages

2-233 and 2-234

2-234.1/2-234.2

2-255 and 2-256

4-53 and 4-54

5-81 and 5-82

6-127 and 6-128

6-128.1/6-128.2

6-141 and 6-142

6-165 and 6-166

front of manual for reference purposes.

GORDON R. SULLIVAN


Chief of Staff

MILTON H. HAMILTONAdministrative Assistant to the


DISTRIBUTION:To be distributed in accordance with DA Form 12-31-E, block no. 1408, require-

ments for TM 55-1520-210-23-1.


URGENT

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CHANGE

NO. 22

TM 55-1520-210-23-1C 22


WASHINGTON, D.C., 31 MARCH 1993




DISTRIBUTION STATEMENT A: Approved

HELICOPTERS

for public release; distribution is unlimited.


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


1-5 through 1-10

1-15 through 1-181-23 and 1-241-29 and 1-301-30.1 through 1-30.41-41 and 1-421-51 and 1-521-65 and 1-661-95 and 1-961-99 and 1-1001-105 and 1-1062-15 through 2-202-23 and 2-242-33 and 2-34

2-53 and 2-542-69 and 2-702-99 and 2-1002-103 and 2-1042-143 and 2-1442-149 through 2-1522-195 and 2-196

2-213 and 2-2142-253 and 2-2543-3 and 3-43-4.1/(3–4.2 blank)3-5 and 3-64-27 and 4-284-42.5 and 4-42.64-49 and 4-504-53 through 4-564-57 and 4-584-61 and 4-624-71 through 4-74

1-5 through 1-10

1-15 through 1-181-23 and 1-241-29 and 1-301-30.1 through 1-30.41-41 and 1-421-51 and 1-521-65 and 1-661-95 and 1-961-99 and 1-1001-105 and 1-1062-15 through 2-202-23 and 2-242-33 and 2-34

2-53 and 2-542-69 and 2-702-99 and 2-1002-103 and 2-1042-143 and 2-1442-149 through 2-1522-195 and 2-1962-213 and 2-2142-253 and 2-2543-3 and 3-43-4.1/(3-4.2 blank)3–5 and 3-64-27 and 4-284-42.5 and 4-42.64-49 and 4-504-53 through 4-564-57 and 4-584-61 and 4-624-71 through 4-74

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4-77 and 4-784-85 and 4-864-97 and 4-985-5 and 5-65-19 through 5-225-29 and 5-305-30.1/(5-30.2 blank)5-31 and 5-325-54.13 and 5-54.145-67 and 5-685-69 through 5-725-75 and 5-765-83 and 5-845-101 and 5-1025-109 and 5-1105-113 and 5-1145-117 and 5-1185-123 and 5-1245-125 through 5-130

5-131 and 5-1325-153 and 5-1545-158.1 and 5-158.25-159 and 5-1606-9 and 6-106-13 and 6-146-17 through 6-226-29 and 6-30

—---

6-35 through 6-386-41 and 6-426-44.3/(6-44.4 blank)6-47 and 6-48

6-55 through 6-586-65 and 6-666-73 through 6-84

----

6-85 through 6-906-93 through 6-1046-115 and 6-1166-116.1 and 6-116.26-116.5 and 6-116.66-123 and 6-1246-139 and 6-1406-145 and 6-1466-147 and 6-148

6-148.1/(6-148.2 blank)6-149 through 6-1566-161 through 6-1646-166.1 and 6-166.26-169 and 6-170

4-77 and 4-784-85 and 4-864-97 and 4-985-5 and 5-65-19 through 5-225-29 and 5-305-30.1/(5-30.2 blank)5-31 and 5-325-54.13 and 5-54.145-67 and 5-685-69 through 5-725-75 and 5-765-83 and 5-845-101 and 5-1025-109 and 5-1105-113 and 5-1145-117 and 5-1185-123 and 5-1245-125 through 5-130

5-131 and 5-1325-153 and 5-1545-158.1 and 5-158.25-159 and 5-1606-9 and 6-106-13 and 6-146-17 through 6-226-29 and 6-306-34.1/(6-34.2 blank)6-35 through 6-386-41 and 6-426-44.3 and 6-44.46-47 and 6-48

6-55 through 6-586-65 and 6-666-73 through 6-846-84.1 and 6-84.26-85 through 6-906-93 through 6-1046-115 and 6-1166-116.1 and 6-116.26-116.5 and 6-116.66-123 and 6-1246-139 and 6-1406-145 and 6-1466-147 and 6-148

----

6-149 through 6-1566-161 through 6-1646-166.1 and 6-166.26-169 and 6-170


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CHANGE ENSURE

RENT PAGE.

A MORE CURRENT CHANGE PAGE IS NOT REPLACED WITH A LESS CUR-

CHANGE

NO. 21

TM 55-1520-210-23-1

C21

HEADQUARTERS


WASHINGTON, D.C., 15 JANUARY 1992




HELICOPTERS


1. Remove and insert pages as indicated below. New or changed text materialis indicated by a vertical bar in the margin. An illustration change is indicated


Remove pages Insert Pages

1-35 and 1-36 1-35 and 1-36

6-97 and 6-98 6-97 and 6-98

6-129 and 6-130 6-129 and 6-130

6-133 and 6-134 6-133 and 6-134

6-137 and 6-138 6-137 and 6-138- - - - 6-138.1/6-138.2

6-141 and 6-142 6-141 and 6-142

6-147 and 6-148 6-147 and 6-148- - - - 6-148.1/6-148.2

6-161 and 6-162 6-161 and 6-162

6-165/6-166 6-165 and 6-166- - - - 6-166.1 through 6-166.3/

6-166.4


URGENT

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TM 55-1520-210-23-1

C21


MILTON H. HAMILTON



GORDON R. SULLIVAN


Chief of Staff

DISTRIBUTION

To be distributed in accordance with DA Form 12-31-E, block no, 1408, AVUM and

AVIM maintenance requirements for TM 55-1520-210-23-1.

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URGENT

NOTICE: THIS CHANGE HAS BEEN PRINTED AND DISTRIBUTED OUT OF SEQUENCE. IT SHOULD


CHANGE ENSURE

RENT PAGE.

A MORE CURRENT CHANGE PAGE IS NOT REPLACED WITH A LESS CUR-

CHANGE

NO. 20

TM 55-1520-210-23-1

C 20

HEADQUARTERS


WASHINGTON, D.C., 1 July 1991




HELICOPTERS





4-85 and 4-86 4-85 and 4-86

5-4.1 and 5-4.2 5-4.1 and 5-4.2

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


Official:

PATRICIA P. HICKERSONColonel, United States Army

The Adjutant General

CARL E. VUONOGeneral, United States Army

Chief of Staff

DISTRIBUTION:

To be distributed in accordance with DA Form 12-31-E, block no. 1408, AVUM and


URGENT

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TM 55-1520-210-23-1

C 19

CHANGE

NO. 19

HEADQUARTERS


WASHINGTON, D.C., 14 June 1991




HELICOPTERS






1-3 and 1-41-15 through 1-18

1-30.3 and 1-30.4

1-33 and 1-341-55 and 1-56

1-60.1 and 1-60.2

1-61 and 1-62

1-75 through 1-82

1-82.1 and 1-82.2

1-87 and 1-881-99 and 1-100

1-105 through 1-108

2-9 and 2-10

2-107 and 2-108

2-120.1/2-120.2

2-121 and 2-122

2-129 and 2-130- - - -

2-145 and 2-146

2-151 and 2-152

2-179 and 2-180

2-197 and 2-198

2-209 through 2-212

3-4.1/3-4.2

4-3 through 4-6

4-13 and 4-14

4-41 and 4-42

4-42.3 and 4-42.4

4-43 through 4-46

4-57 through 4-60- - - -

4-73 and 4-74

4-77 and 4-78

4-97 through 4-1004-111 and 4-112

1-3 and 1-4

1-15 through 1-18

1-30.3 and 1-30.4

1-33 and 1-341-55 and 1-561-60.1 and 1-60.2

1-61 and 1-621-75 through 1-82

1-82.1 and 1-82.21-87 and 1-881-99 and 1-100

1-105 through 1-108

2-9 and 2-10

2-107 and 2-108

2-120.1 and 2-120.2

2-121 and 2-122

2-129 and 2-1302-130.1/2-130.2

2-145 and 2-146

2-151 and 2-152

2-179 and 2-180

2-197 and 2-198

2-209 through 2-212

3-4.1/3-4.24-3 through 4-6

4-13 and 4-14

4-41 and 4-42

4-42.3 and 4-42.4

4-43 through 4-46

4-57 through 4-604-60.1 through 4-60.7/4-60.8

4-73 and 4-74

4-77 and 4-78

4-97 through 4-100

4-111 and 4-112

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5-15 and 5-16

5-32.1 and 5-32.2

5-33 and 5-34

5-43 and 5-44

5-79 through 5-82

5-101 through 5-1045-115 through 5-118

5-155 and 5-156

5-158.1/5-158.2

6-29 and 6-30

6-37 through 6-44--- -

6-45 through 6-48

6-55 through 6-58

6-59 and 6-60--- --

6-67 and 6-68

6-71 through 6-74

6-79 through 6-866-97 through 6-100

6-103 through 6-108

6-115 and 6-116

6-116.3 and 6-116.4

6-137 and 6-138

6-138.1/6-138.2

6-139 through 6-142

6-145 and 6-146- - - -

6-147 and 6-148

6-149 through 6-154

6-163 and 6-164

6-167 through 6-172- - - -

6-173/6-174Index 1 through Index 14

5-15 and 5-16

5-32.1 and 5-32.2

5-33 and 5-34

5-43 and 5-44

5-79 through 5-82

5-101 through 5-1045-115 through 5-118

5-155 and 5-156

5-158.1 and 5-158.2

6-29 and 6-30

6-37 through 6-44

6-44.1 through 6-44.3/6-44.4

6-45 through 6-48

6-55 through 6-58

6-59 and 6-60

6-60.1/6-60.2

6-67 and 6-68

6-71 through 6-74

6-79 through 6-86

6-97 through 6-100

6-103 through 6-108

6-115 and 6-116

6-116.3 and 6-116.4

6-138 and 6-1386-138.1 through 6-138.3/

6-138.46-139 through 6-142

6-145 and 6-146

6-146.1 and 6-146.2

6-147 and 6-148

6-149 through 6-154

6-163 and 6-164

6-167 through 6-172

6-172.1 through 6-172.3/

6-172.46-173 and 6-174

Index 1 through Index 14


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C 19


MILTON H. HAMILTON



01748

GORDON R. SULLIVAN


Chief of Staff

DISTRIBUTION:To be distributed in accordance with DA Form 12-31-E, block no. 1408, AVUM and


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URGENT

CHANGE

NO. 18

TM 55-1520-210-23-1

C 18

HEADQUARTERS


WASHINGTON, D.C., 14 May 1991

AVIATION UNIT AND INTERMEDIATEMAINTENANCE INSTRUCTIONS


HELICOPTERS



is indicated by a vertical bar in the margin. An illustration change


is indicated

Remove pages

1-109 through 1-1

5-147 and 5-148

5-159 and 5-160

2. Retain this sheet

Insert pages

1414 1-109 through 1-

5-147 and 5-148

5-159 and 5-160

in front of manual for reference purposes.

By order of the Secretary of the Army:



PATRICIA P. HICKERSONColonel, United States Army


DISTRIBUTION:

To be distributed in accordance with DA Form 12-31-E, block no. 1408, AVUM

and AVIM maintenance requirements for TM 55-1520-210-23-1.

URGENT

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RENT PAGE.

TM 55-1520-210-23-1

C 17

CHANGE HEADQUARTERS


NO. 17 WASHINGTON, D.C., 28 February 1991




HELICOPTERS





4-41 and 4-42 4-41 and 4-42

4-42.3 and 4-42.4 4.42.3 and 4-42.4

4-42.4.1 and 4-42.4.2 4-42.4.1 and 4-42.4.2

4-42.5 and 4-42.6 4-42.5 and 4-42.6



Official:

THOMAS F. SIKORA Brigadier General, United States Army



Chief of Staff

DISTRIBUTION:

To be distributed in accordance with DA Form 12-31-E, block no 1408, AVUM and


URGENT

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URGENT




RENT PAGE.

TM 55-1520-210-23-1

C 16

CHANGE

NO. 16






HELICOPTERS





4-42.3 and 4-42.4 4-42.3 and 4-42.4

4-42.4.1 and 4-42.4.2 4-42.4.1 and 4-42.4.2



official:


Chief of Staff

THOMAS F. SIKORA

Brigadier General, United States Army The Adjutant General

DISTRIBUTION:

To be distributed in accordance with DA Form 12-31, AVUM and AVIM Maintenance

requirements for UH-1H, UH-1V Helicopter, Utility, EH-1H Helicopter, Electronic

Countermeasure, and EH-1X Helicopter, Electronic Countermeasure and Intercept.

URGENT

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URGENT

NOTICE : THIS CHANGE HAS BEEN PRINTED AND DISTRIBUTED OUT OF SEQUENCE. IT SHOULDBE INSERTED IN THE MANUAL AND USED. UPON RECEIPT OF THE EARLIER SEQUENCED CHANGE

ENSURE A MORE CURRENT CHANGE PAGE IS NOT REPLACED WITH A LESS CURRENT PAGE.

TM 55-1520-210-23-1C 15


NO. 15 WASHINGTON, D.C., 1 SEPTEMBER 1990




HELICOPTERS


1. Remove and insert pages as indicated below. New or changed

is indicated by a vertical bar in the margin. An illustration changeby a miniature pointing hand.


text material

is indicated

5-91 and 5-92 5-91 and 5-92

5-103 and 5-104 5-103 and 5-104



official:



CARL E. VUONO

General,United States Army Chief of Staff

DISTRIBUTION:


requirements for UH-1H, UH-1V Helicopter, Utility and EH-1H Helicopter, Electronic

Countermeasure and EH-1X Helicopter, Electronic Countermeasure and Intercept.

URGENT

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URGENT

NOTICE : THIS CHANGE HAS BEEN PRINTED AND DISTRIBUTED OUT OF SEQUENCE. IT SHOULDBE INSERTED IN THE MANUAL AND USED. UPON RECEIPT OF THE EARLIER SEQUENCED CHANGE


TM 55-1520-210-23-1

C 14

CHANGE HEADQUARTERS


No. 14 WASHINGTON, D.C., 1 August 1990




HELICOPTERS






1-113 and 1-114 1-113 and 1-114

4-42.1 through 4-42.4 4-42.1 through 4-42.4--- - 4-42.4.1 through 4-42.4.4



CARL E. VUONO



THOMAS F. SIKORA


DISTRIBUTION:


requirements for UH-1H, UH-1V Helicopter, Utility and EH-1H Helicopter, Electronic

Countermeasure and EH-1X Helicopter, Electronic Countermeasure and Intercept

URGENT

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URGENTTM 55-1520-210-23-1

C 13

CHANGE

NO. 13

HEADQUARTERS


WASHINGTON, D.C., 1 August 1990



HELICOPTERS






1-11 through 1-22 1-11 through 1-221-25 through 1-30 1-25 through 1-30

1-30.1 through 1-30.5 1-30.1 through 1-30.5/

1-30.6 1-30.6

1-35

1-531-631-751-79

1-83

1-91

1-95

1-99

through 1-38

through 1-56

through 166and 1-76

and 1-80

through 1-86through 1-94

and 1-96

through 1-110

2-1 and 2-22-17 through 2-20

2-31 through 2-36

2-45 and 2-46

2-53 through 2-56

2-69 and 2-70

2-83 through 2-88

2-88.1 and 2-88.2

2-89 and 2-90

2-115 and 2-116

2-119 and 2-120

2-121 and 2-122

2-135 and 2-136

2-139 and 2-1402-143 and 2-144- - - - -

2-151 through 2-154- - - -

2-185 and 2-186

2-193 through 2-1982-205 through 2-218

1-35 through 1-38

1-53 through 1-56

1-63 through 1-66

1-75 and 1-76

1-79 and 1-80

1-83 through 1-86

1-91 through 1-94

1-95 and 1-96

1-99 through 1-110

2-1 and 2-22-17 through 2-20

2-31 through 2-36

2-45 and 2-46

2-53 through 2-56

2-69 and 2-70

2-83 through 2-88

2-88.1 and 2-88.2

2-89 and 2-90

2-115 and 2-116

2-119 and 2-120

2-121 and 2-122

2-135 and 2-136

2-139 and 2-1402-143 and 2-144

2-144.1/2-144.2

2-151 through 2-154

2-182.1/2-182.2

2-185 and 2-186

2-193 through 2-198

2-205 through 2-218

URGENT

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2-229 and 2-230

2-233 and 2-234

2-247 and 2-248

2-255 and 2-256

2-261 and 2-262

2-269 through 2-2723-1 through 3-4- - - - - -

3-5 through 3-8

3-13 and 3-14---- - -

3-17 and 3-18

3-23 and 3-24

4-1 through 4-6

4-13 and 4-14

4-17 and 4-18

4-45 and 4-46

4-53 through 4-56

- - - -4-57 through 4-62

4-67 and 4-68

4-71 through 4-82

4-85 and 4-86

4-89 and 4-90

4-93 through 4-98

4-107 through 4-112

5-1 and 5-2

5-3 and 5-4

5-4.1 and 5-4.2

5-5 and 5-6

5-6.1/5-6.2

5-18.1/5-18.2

5-21 and 5-22

5-32.1 and 5-32.2

5-33 and 5-34

5-38.1 through 548.3/

5 - 3 8 . 45-39 and 5-40

5-40.1/5-40.2

5-41 and 5-42

5-45 through 5-48

5-51 through 5-54

5-54.1 through 5-54.48

5-57 and 5-58

5-61 and 5-62

5-62.15-63 and 5-64

5-64.1/5-64.2

5-65 and 5-66

5-68.1 and 5-68/2

5-71 and 5-72

5-85 and 5-865-103 and 5-104

2-229 and 2-230

2-233 and 2-234

2-247 and 2-248

2-255 and 2-256

2-261 and 2-262

2-269 through 2-272

3-1 through 3-4

3-4.1/3-4.2

3-5 through 3-8

3-13 and 3-14

3-14.1/3-14.2

3-17 and 3-18

3-23 and 3-24

4-1 through 4-6

4-13 and 4-14

4-17 and 4-18

4-45 and 4-46

4-53 through 4-56

4-56.1/4-56.2

4-57 through 4-62

4-67 and 4-68

4-71 through 4-82

4-85 and 4-86

4-89 and 4-90

4-93 through 4-98

4-107 through 4-112

5-1 and 5-2

5-3 and 5-4

5-4.1 and 5-4.2

5-5 and 5-6

5-6.1 and 5-6.2

5-18.1/5-18.2

5-21 and 5-22

5-32.1 and 5-32.2

5-33 and 5-34

5-38.1 through 5-38.3/

5-38.4

5-39 and 5-40

5-40.1/5-40.2

5-41 and 5-42

5-45 through 5-48

5-51 through 5-54

5-54.1 through

5-54.49/5-54.505-57 and 5-58

5-61 and 5-62

5-62.1 and 5-62.2

5-63 and 5-64

5-64.1 and 5-64.2

5-65 and 5-66

5-68.1 and 5-68.2

5-71 and 5-72

5-85 and 5-865-103 and 5-104

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5-107 through 5-110

5-113 through 5-116

5-121 through 5-124- - - -

5-125 and 5-126

5-130.1/5-130.25-141 and 5-142

5-147 and 5-148

5-151 and 5-152- - - - -

5-153 and 5-154--- -- -

5-155 through 5-158

5-158.1 and 5-158.2- - - -

5-173 and 5-174

5-183 and 5-184

5-184.1 through 5-184.3/

5-184.4

6-23 through 6-26

6-29 and 6-30--- - -

6-31 and 6-32

6-35 through 6-44

6-47 through 6-58- - — -

6-59 through 6-62

6-71 and 6-72

6-75 and 6-76

6-79 through 6-82

6-85 through 6-88

6-91 through 6-1006-103 and 6-104

6-111 through 6-1166-116.1 through 6-116.5/

6-116.6

6-127 through 6-130

6-133 through 6-138

6-141 through 6-156

6-159 through 6-165/6-166- - - -

5-107 through 5-110

5-113 through 5-116

5-121 through 5-124

5-124.1/5-124.2

5-125 and 5-126

5-130.1/5-130.25-141/5-142

5-147 and 5-148

5-151 and 5-152

5-152.1 and 5-152.2

5-153 and 5-154

5-154.1 and 5-154.2

5-155 through 5-158

5-158.1/5-158.2

5-164.1/5-164.2

5-173 and 5-174

5-183 and 5-184

5-184.1 through 5-184.3/

5-184.4

6-23 through 6-26

6-29 and 6-30

6-30.1/6-30.2

6-31 and 6-32

6-35 through 6-44

6-47 through 6-58

6-58.1/6-58.2

6-59 through 6-62

6-71 and 6-72

6-75 and 6-76

6-79 through 6-82

6-85 through 6-88

6-91 through 6-100

6-103 and 6-104

6-111 through 6-116

6-116.1 through 6-116.6

6-127 through 6-130

6-133 through 6-138

6-141 through 6-156

6-159 through 6-165/6-166

Index 1 through Index 14

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C 13


Official:

CARL E. VUONO




DISTRIBUTION:

To be distributed in accordance with DA Form 12-31-E, block no. 1408, AVUM and


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URGENT

CHANGE

NO. 12

TM 55-1520-210-23-1C 12

HEADQUARTERS


WASHINGTON, D.C., 12 April 1990









1-99 and 1-100 1-99 and 1-100

1-103 and 1-104 1-103 and 1-104

1-111 through 1-114 1-111 through 1-114----- 5-18.1/5-18.22. Retain this sheet in front of manual for reference purposes.


Official:

CARL E. VUONO


WILLIAM J. MEEHAN II


DISTRIBUTION:


instructions for UH-1H, UH-1V Helicopter, Utility and EH-1H Helicopter, Electronic


URGENT

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URGENTNOTICE: THIS CHANGE HAS BEEN PRINTED AND DISTRIBUTED OUT OF SEQUENCE. IT SHOULDBE INSERTED IN THE MANUAL AND USED. UPON RECEIPT OF THE EARLIER SEQUENCED CHANGEENSURE A MORE CURRENT CHANGE PAGE IS NOT REPLACED WITH A LESS CURRENT PAGE.

TM 55-1520-210-23-1

C 11

CHANGE

NO. 11


WASHINGTON, D.C., 1 March 1990




HELICOPTERS


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


5-17 through 5-20 5-17 through 5-205-31 and 5-32 5-31 and 5-32



Official:


Chief of Staff



DISTRIBUTION:To be distributed in accordance with DA Form 12-31, AVUM and AVIM Maintenance

instructions for UH-1H, UH-1V Helicopter, Utility and EH-1H Helicopter, Electronic


URGENT

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URGENTNOTICE: THIS CHANGE HAS BEEN PRINTED AND DISTRIBUTED OUT OF SEQUENCE. IT SHOULD



RENT PAGE.

TM 55-1520-210-23-1

C 10

CHANGE

NO. 10

HEADQUARTERS






HELICOPTERS





5-72.5 and 5-72.6 5-72.5 and 5-72.6

5-73 and 5-74 5-73 and 5-74

5-103 through 5-106 5-103 through 5-106



Official:

CARL E. VUONO



Brigadier General, United States Army


DISTRIBUTION:

To be distributed in accordance with DA Form 12-31, AVUM and AVIM Maintenanceinstructions for UH-1H, UH-1V Helicopter, Utility, EH-1H Helicopter, Electronic


URGENT

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92/1296

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URGENT


BE INSERTED IN THE MANUAL AND USED. UPON RECEIPT OF THE EARLIER SEQUENCED CHANGE


CHANGE

NO. 9

TM 55-1520-210-23-1

C 9

HEADQUARTERS



Aviation Unit and intermediate



HELICOPTERS






5-21 and 5-22 5-21 and 5-22

5-31 and 5-32 5-31 and 5-32

5-32.1 and 5-32.2 5-32.1 and 5-32.25-33 and 5-34 5-33 and 5-34----- 5-34.1/5-34.2

5-63 and 5-64 5-63 and 5-64

5-65 and 5-66 5-64 and 5-66



Official:

CARL E. VUONO


Chief of Staff




DISTRIBUTION:


requirements for UH-1H, UH-1V Helicopter? Utility and EH-1H Helicopter, Electronic


URGENT

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TM 55-1520-210-23-1

C 8

CHANGE

NO. 8

HEADQUARTERS






HELICOPTERS






i through iii iv

P-1 and P-2

1-9 and 1-10

1-13 through 1-30- - - -

1-37 through 1-40- - - -

1-51 and 1-52

1-55 and 1-56

1-59 and 1-60- - - -

1-61 and 1-62

1-65 and 1-661-69 and 1-70

1-105 and 1-106

1-109 and 1-1105-1 and 5-2

5-3 and 5-4

5-4.1 and 5-4 2

5-5 and 5-6

5-9 through 5-12

5-15 and 5-16/

5-22.1 and 5-22.25-23 through 5-28

5-28.3/5-28.4

5-29 and 5-30

5-30.1/5-30.2

5-35 and 5-365-40.1/5-40.2

5-41 through 5-44

5-47 through 5-50

5-53 and 5-54

5-54.1/5-54.2

5-55 through 5-62

i through iii/iv

P-1 and P-2

1-9 and 1-10

1-13 through 1-30

1-30.1 through 1-30.5/1-30.6

1-37 through 1-40

1-42.1/1-42.2

1-51 and 1-52

1-55 and 1-56

1-59 and 1-60

1-60.1 and 1-60.2

1-61 and 1-62

1-65 and 1-66

1-69 and 1-70

1-105 and 1-106

1-109 and 1-1105-1 and 5-2

5-3 and 5-4

5-4.1 and 5-4.2

5-5 and 5-6

5-6.1/5-6.2

5-9 through 5-12

5-15 and 5-16

5-22.1 and 5-22.2

5-23 through 5-28

5-28.3/5-28.4

5-29 and 5-30

5-30.1 and 5-30.2

5-35 and 5-365-40.1/5-40.2

5-41 through 5-44

5-47 and 5-48

5-53 and 5-54

5-54.1 through 5-54.48

5-55 through 5-62

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5-65 through 5-68

5-68.1 and 5-68.2

5-69 through 5-72

5-79 and 5-80

5-87 and 5-88

5-97 through 5-1005-107 and 5-108

5-113 through 5-118

5-118.1/5-118.2 ,

5-119 and 5-120

5-127 through 5-130 ‘

5-130.1/5-130.2-

5-135 through 5-138

5-141 and 5-142

5-151 through 5-158- - - -

5-183 and 5-184- - - -

5-65 through 5-68

5-68.1 and 5-68.2

5-69 through 5-72

5-79 and 5-80

5-87 and 5-88

5-97 through 5-1005-107 and 5-108

5-113 through 5-118--- -

5-119 and 5-120

5-127 through 5-130

5-130.1/5-130.2

5-135 through 5-138

5-141 and 5-142

5-151 through 5-158

5-158.1 and 5-158.2

5-183 and 5-184

5-184.1 through 5-184.3/5-184.4



Official:

WILLIAM J. MEEHAN 11



CARL E. VUONO


DISTRIBUTION:


requirements for JH-1H, UH-1V Helicopter, Utility and EH-1H Helicopter, Electronic


8/16/2019 57700507-TM-55-1520-210-23-1.pdf

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CHANGE

NO. 7

Official:

TM 55-1520-210-23-1

C 7

HEADQUARTERS


WASHINGTON, D.C., 30 November 1989




HELICOPTERS






5-85 and 5-86 5-85 and 5-86



CARL E. VUONO





DISTRIBUTION:


Requirements for UH-1H, UH-1V Helicopter, Utility and EH-1H Helicopter,

Electronic Countermeasure and EH-1X Helicopter, Electronic Countermeasure and

Intercept.

U R G E N T

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CHANGE

NO. 6

URGENT TM 55-1520-210-23-1C 6

HEADQUARTERS


WASHINGTON, D.C., 17 November 1989




HELICOPTERS






5-83 and 5-84 5-83 and 5-84---- 5-84.1/5-84.2



Official:

CARL E. VUONO



Brigadier General, United States ArmyThe Adjutant General

DISTRIBUTION:

To be distributed in accordance with DA Form 12-31, AVUM and AVIM Maintenanceinstructions for UH-1H, UH-1V Helicopter, Utility and EH–1H Helicopter, Electronic

Countermeasure and EH-1X Helicopter, Electronic Countermeasure & Intercept.

URGENT

8/16/2019 57700507-TM-55-1520-210-23-1.pdf

100/1296

8/16/2019 57700507-TM-55-1520-210-23-1.pdf

101/1296

CHANGE

NO. 5

URGENT TM 55-1520-210-23-1c 5






HELICOPTERS

TM

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