TECHNICAL MANUAL AVIATION UNIT AND INTERMEDIATE ...

1 TM 55-1520-236-23-2 TECHNICAL MANUALAVIATION unit AND INTERMEDIATEMAINTENANCE MANUALARMY MODELAH-IP (PROD)AH-1E (ECAS)AH-1F (MODERNIZED COBRA)HELICOPTERS Approved for public release; distribution is unlimited. HEADQUARTERS, DEPARTMENT OF THE ARMY8 MAY 1980 PIN: 032466-016 CHANGENO. 2210-5 through 10-810-11 and 10-1210-13 through and through 11-3211-79 and 11-80TM 55-1520-236-23-2C22 HEADQUARTERSDEPARTMENT OF THE ARMYWASHINGTON, , 30 April 1996 AVIATION unit and IntermediateMaintenance ManualARMY MODELAH-1 P (PROD)AH-1 E (ECAS)AH-IF (MODERNIZED COBRA)HELICOPTERSDISTRIBUTION STATEMENT A: Approved for public release; distribution is 55-1520-236-23-2, 8 May 1980, 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 pagesInsert pagesi and iii and iiv and viv and vixix and xxxix and xx7-55 through 7-587-55 through 7-588-7 and 8-88-7 and 8-88-17 and 8-188-17 and 8-188-23 and 8-248-23 and 8-249-23 and 9-248-23 and 9-249-29 and 9-309-29 and 9-309-85 and 9-869-85 and ( blank) and and 9-989-97 and 9-889-101 through 9-1049-101 through 9-1049-111 and 9-1129-111 and 9-1120-5 through 10-80-11 and 10-120-13 through and through 11-321-79 and 11-8016-7 and 16-816-7 and 16-8TM 55-1520-236-23-2C 22 Remove pagesInsert pages16-11 and 16-1216-11 and 16-1216-19 and 16-2016-19 and 16-2016-27 and 16-2816-27 and 16-2816-31 and 16-3216-31 and 16-322.

2 Retain this sheet in front of MANUAL for reference Order of the Secretary of the Army:DENNIS J. REIMERG eneral, United States ArmyChief of StaffDISTRIBUTION:To be distributed in accordance with DA Form 12-31-E, block no. 1149, requirements forTM 55-1520-236-23-2C 21 CHANGENO. 21 HEADQUARTERSDEPARTMENT OF THE ARMYWASHINGTON, D. C., 31 October 1995 AVIATION unit and IntermediateMaintenance ManualARMY MODELAH-1P (PROD)AH-1E (ECAS)AH-1F (MODERNIZED COBRA)HELlCOPTERSDISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimitedTM 55-1520-236-23-2, 8 May 1980, 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 pagesi through /( blank) ( blank)ix and ( blank)xi and xii------xvii and ( blank)xix through xxi/(xxii blank)7-59 and 7-608-41 through 8-44------Insert pagesi through and ( blank)ix and ( blank)xi and ( blank)xvii and xviiixviii.

3 1 and through xxii7-59 and 7-608-41 through through ( blank) this sheet in front of MANUAL for reference 55-1520-236-23-2C21By Order of the Secretary of the Army:DENNIS J. REIMERG enera/, United States ArmyChief of StaffDISTRIBUTION:To be distributed in accordance with DA Form 12-31-E, block no. 1149, requirements forTM 55-1520-236-23-2C 20 CHANGENO. 20 HEADQUARTERSDEPARTMENT OF THE ARMYWASHINGTON, , 15 December 1994 AVIATION unit and IntermediateMaintenance ManualARMY MODELAH-1 P (PROD)AH-1E (ECAS)AH-1F (MODERNIZED COBRA)HELlCOPTERSDISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimitedTM 55-1520-236-23-2,8 May 1980, 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 pagesInsert pagesV and ( blank)vii and ( blank)ix and ( blank)xi and xiixix and xx9-15 through 9-189-83 and /( blank)9-85 and and and ( blank)B-19 and B-20B-25 and B-26C-3 and C-4v and ( blank)vii and ( blank)ix and ( blank)xi and xiixix and xx9-15 through 9-189-83 and /( blank)9-85 and through ( blank)B-11 and and and B-20B-25 and B-26C-3 and C-42.

4 Retain this sheet in front of MANUAL for reference 55-1520-235-23-2C20By Order of the Secretary of the Army:Official:Administrative Assistant to theSecretary of the Army07664 GORDON R. SULLIVANG eneral, United States ArmyChief of StalfDISTRIBUTION:To be distributed in accordance with DA Form 12-31-E, block no. 1149, requirements forTM 55-1520-236-23-2TM 55-1520-236-23TM 55-1520-236-23-2TM 55-1520-236-23-2TM 55-1520-236-23-2TM 55-1520-236-23-2 TECHNICAL MANUALNo. 55-1520-236-23-2TM 55-1520-236-23-2 HEADQUARTERSDEPARTMENTWASHINGTON, , AVIATION unit and IntermediateMaintenance ManualARMY MODELAH-1P (PROD)AH-lE (ECAS)AH-1F (MODERNIZED COBRA)HELICOPTERSNOTEThis MANUAL is printed in five volumes, as follows:OF THE ARMY8 May 1980TM 55-1520-236-23-1, consisting of Table of Contents, Preface Chap-ters 1 through 55-1520-236-23-2, consisting of Table of 7through A through 55-1520-236-23-3, consisting of Table of Contents, Appendix Dthrough G, and 55-1520-236-23-4, consisting of Table of Contents, FO-1 55-1520-236-23-5, consisting of Table of Contents, FO-143 (Sheet1 of 28 through Sheet 28 of 28) through Preface, Appendices and Index are applicable to all volumes.

5 *This MANUAL together with TM 55-1520-236-23-1, 8 May 1980, TM May 1980, TM 55-1520-236-23-4, 8 May 1980,and TM 55-1520-236 23 5, 31 July1990, supersedes TM 55-1520-236-23-1,30 June 1977 and TM 55-1520-236-23-2,30 June 16 WARNING PAGETM 66-1620-236-23 WARNINGP ersonnel performing operations, procedures, and practices whichare included or implied in this TECHNICAL MANUAL shall observe thefollowing warnings. Disregard of these warnings and precautionaryinformation can cause serious injury, or , cautions, and notes are used to emphasize important andcritical instructions and shall be used for the following conditions:STARTING ENGINES tarting and Operationof the helicopter will be performed only byauthorized personnel in accordance with AR VOLTAGEThe helicopter should be electrically grounded when off all power switches before making electrical connections or burns and electrical shock can result from contactwith exposed electrical wires or LIGHTThe AIM-1/EXL laser beam is dangerous and can cause blindness ifit enters the eye either directly or reflected from a shiny that the laser protective cover is kept over the emitter andthat the AIM power switch is off at all times when the laser is notin use.

6 The laser shall be used only in controlled areas by goggles are required during operation andboresight 19 aTM 55-1520-236-23 WARNING PAGERADIATION HAZARDSelf-luminous dials contain radioactive such an instrument is broken or becomes unsealed, avoid personal forceps or gloves made of rubber or polyethylene to pick up contaminated material and gloves in a plastic bag and dispose of it as radioactive wastein accordance with AR 755-15 and TM 3-261 (TB 43-0108).Repair procedures shall conform to requirements in AR CHEMICALSE xposure to high concentrations of fire extinguishing agentscan cause severe irritation of eyes and Battery Electrolyte (potassium Hydroxide). Wearrubber gloves, apron, and face shield when handling leakingbatteries. If potassium hydroxide is spilled on clothing, orother material, wash immediately with clean water.

7 If spilledon personnel, immediately start flushing the affected area withclean water. Continue washing until medical assistance solvents or chemicals in a well ventilated not inhale vapors or allow to come in contact with skin or proper fire prevention LEVELS ound pressure levels in the helicopter during someoperating conditions exceed the Surgeon Generals hearingconservation criteria as defined in TB MED , protection devices, such as the aviator helmet orear plugs, are required to be worn by all personnel inand around the helicopter during its FIBERSA void creating dust. Breathing asbestos dustmay cause serious bodily working on, or near an armed helicopter, take all possibleprecautions to avoid accidental firing of shall not occupy possible firing pattern in front of or up to20 feet behind rocket shall be handled by authorized personnel weapons shall be dry-fired.

8 Only dummy ammunition with smoothcases like live ammunition shall be 19 WARNING PAGETM 55-1520-236-23 JETTISONAll ground safety pins must be removed before to do so will prevent emergency jettison of circuit may be activated with BAT switch OFFand pilot WING STORES JTSN circuit breaker OPEN. Forpositive deactivation of jettison circuit, open boththe PLT JTSN circuit breaker and the GNR JTSN circuitbreaker located in the pilot s side injury can result from accidental ground DUSTS anding on reinforced Iarninated glass producesfine dust that may cause skin necessary protective LEVELINGDo not attempt to level transmission with Jacks Only .Hoist must be used in conjunction with jacks while lifting STORESP rior to any helicopter maintenance functions thatrequire external stores be removed, JETTISON cartridgeshall be jettison cartridges from pylon stores ejectiondevice prior to placing helicopter in a hangar, to preventinjury to personnel and damage to : Removal is not necessary when helicopter isto be placed in hangar for short-term, providing bothPLT JTSN and GNR JETSN circuit breakers in the pilot s sideconsole are OPEN, and warning signs indicate that helicopterhas an armed jettison REMOVAL SYSTEMG round safety pins must be installed inpilot and gunner arming firing canopy removal system whenever thehelicopter is on the ground.

9 Pins shouldbe installed by HYDRAULIC COMPONENTSThe use of any alcohol in cleaning components which contacthydraulic fluids is prohibited. Formation of apolymeric residue can result, which could impair mechanicaloperation of the 12 cTM 55-1520-236-23 WARNING PAGEHANDLING HYDRAULIC FLUID (MIL-H-83282)When handling hydraulic fluid (MIL-H-83282), Table 1-3, Item61, observe the following: Prolonged contact with liquid or mist can irritate eyes andskin. After any prolonged contact with skin, immediately washcontacted area with soap and water. If liquid contacts eyes,flush them immediately with clear water. If liquid is swallowed, do not induce vomiting; get im-mediate medical attention. Wear rubber gloves when handling liquid. If prolongedcontact with mist is likely, wear an appropriate respirator.

10 When fluid is decomposed by heating, toxic gases BASED ADHESIVEE poxy based adhesive, P/N EA934,contains an asbestos filler which couldbe inhaled or ingested during grinding,cutting, or sanding operations oncured epoxy only chrome plated steel or unplatedsteel tools for disassembly or reassemblyprocedures described in this of cadmium or zinc plated toolsis not aircraft parked outside will be grounded and bonded,in accordance with FM 1-500, to the aerospace groundequipment while servicing, , fueling or defueling, arming(ammunition or explosives), oxygen, hydraulic fluids or anyflammable liquids. Grounding is not necessary for aircraftparked outside unless one of the above is 12 WARNING PAGETM 55-1520-236-23 INSPECTION OF REMOVED COMPONENTSWhen components are being remove from an aircraft, allinspections required by the next phase maintenanceinspection must be accomplished prior to either immediatere-use or storage.