TECHNICAL MANUAL AVIATION UNIT MAINTENANCE (AVUM) AND AVIATION INTERMEDIATE MAINTENANCE (AVIM) MANUAL FOR GENERAL AIRCRAFT MAINTENANCE

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1 *TM TECHNICAL MANUAL AVIATION UNIT MAINTENANCE (AVUM) AND AVIATION INTERMEDIATE MAINTENANCE (AVIM) MANUAL FOR GENERAL AIRCRAFT MAINTENANCE (TOOLS AND GROUND SUPPORT EQUIPMENT) VOLUME 9 *This manual together with TM through TM and TM , dated 31 July 1992, supersedes TM /1, dated 6 April 1970, including all changes. DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. HEADQUARTERS, DEPARTMENT OF THE ARMY 31 JULY 1992 This copy is a reprint which includes current pages from Changes 1 and 2.

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3 C4 CHANGE HEADQUARTERS DEPARTMENT OF THE ARMY NO. 4 WASHINGTON, D.C., 15 MARCH 2001 AVIATION UNIT MAINTENANCE (AVUM) AND AVIATION INTERMEDIATE MAINTENANCE (AVIM) MANUAL FOR GENERAL AIRCRAFT MAINTENANCE (TOOLS AND GROUND SUPPORT EQUIPMENT) VOLUME 9 Part Number National Stock Number thru DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. TM , 31 July 1992, 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 Insert pages A / (B blank) A / (B blank) i / (ii blank) i / (ii blank) 7-11 through through blank 7-16 blank Index 13 and 14 Index 13 and 14

4 C4 2.Retain this sheet in front of manual for reference purposes. By Order of the Secretary of the Army: Official: ERIC K. SHINSEKI General, United States Army Chief of Staff JOEL B. HUDSON Administrative Assistant to the Secretary of the Army DISTRIBUTION: To be distributed in accordance with Initial Distribution Number (IDN) , requirements for TM

5 C3 CHANGE NO. 3 HEADQUARTERS DEPARTMENT OF THE ARMY WASHINGTON, DC 15 June 1999 AVIATION UNIT MAINTENANCE (AVUM) AND AVIATION INTERMEDIATE MAINTENANCE (AVIM) MANUAL FOR GENERAL AIRCRAFT MAINTENANCE (TOOLS AND GROUND SUPPORT EQUIPMENT) VOLUME 9 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. TM , 31 July 1992, 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 Insert pages..... i/ (ii blank) 9-55 and 9-56 Index 3 and 4 Index 7 and 8 2. Retain this sheet in front of manual for reference purposes. A / (B blank) i / (ii blank) 9-55 and 9-56 Index 3 and 4 Index 7 and 8 By Order of the Secretary of the Army: Official: DENNIS J. REIMER General, United States Army Chief of Staff Administrative Assistant to the Secretary of the Army DISTRIBUTION: To be distributed in accordance with Initial Distribution Number (IDN) , requirements for TM

6 C 2 CHANGE HEADQUARTERS DEPARTMENT OF THE ARMY NO. 2 WASHINGTON, D.C., 1 February 1994 AVIATION UNIT MAINTENANCE (AVUM) AND AVIATION INTERMEDIATE MAINTENANCE (AVIM) MANUAL FOR GENERAL AIRCRAFT MAINTENANCE (TOOLS AND GROUND SUPPORT EQUIPMENT) VOLUME 9 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. TM , 31 July 1992, is change 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 Insert pages 4-39 and and and and and and and and and and 9-30 A-1 and A-2 A-1 and A-2 2. Retain this sheet in front of manual for reference purposes.

7 By Order of the Secretary of the Army: GORDON R. SULLIVAN General, United States Army Chief of Staff Official: MILTON H. HAMILTON Administrative Assistant to the Secretary of the Army Distribution: To be distributed in accordance with DA Form E, block No. 3302, requirements for TM U.S. GOVERNMENT PRINTING OFFICE:

8 C 1 CHANGE NO. 1 HEADQUARTERS DEPARTMENT OF THE ARMY WASHINGTON, D.C., 28 MAY 1993 AVIATION UNIT MAINTENANCE (AVUM) AND AVIATION INTERMEDIATE MAINTENANCE (AVIM) MANUAL FOR GENERAL AIRCRAFT MAINTENANCE (TOOLS AND GROUND SUPPORT EQUIPMENT) VOLUME 9 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. TM , 31 July 1992, 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 i/(ii blank) 8-7 and 8-8 Insert pages i/(ii blank) 8-7 and Retain this sheet in front of manual for reference purposes. By Order of the Secretary of the Army: GORDON R. SULLIVAN General, United States Army Chief of Staff Official: MILTON H. HAMILTON Administrative Assistant to the Secretary of the Army DISTRIBUTION: To be distributed in accordance with DA Form E, block no. 3302, requirements for TM

9 PRECAUTIONARY DATA Personnel performing instructions involving operations, procedures, and practices which are included or implied in this technical manual shall observe the following instructions. Disregard of these warnings and precautionary information can cause serious injury, death, or an aborted mission. WARNING HAZARD COMMUNICATION Most materials supplies listed in this volume (paints, solvents, etc.) contain chemical agents which are considered hazardous under 29 CFR , The Hazard Communication Rule (25 Nov 1983). All personnel who have potential on-the-job exposure to chemical agents must be aware of provisions of their organization's written hazard communications program which describes how your facility will comply with the standard. An important part of this standard is the requirement for Material Safety Data Sheets (MSDS) for hazardous materials. The MSDS lists the hazardous chemical components for the product and contains essential information on use, handling, fire-fighting, labeling, emergency procedures (such as accidental spills and leaks) and disposal of material. These MSDS must be accessible to the worker and adequate training provided BEFORE use of hazardous materials. MSDS by themselves are not an adequate substitute for proper training and written procedures. Consult your supervisor, safety officer or industrial hygienist before using any material which may be considered hazardous. Warning labels on products or general warnings mentioned in this document ARE NOT intended to be a complete description of all potential hazards, nor are they a substitute for proper training and MSDS information. WARNINGS, CAUTIONS, and NOTES are means of attracting attention to essential or critical information in a manual. Definitions are outlined as follows. WARNING: An operating or maintenance procedure, practice, condition, statement, etc. which if not strictly observed, could result in injury to or death of personnel. CAUTION: An operating or maintenance procedure, practice, condition, statement, etc., which, if not strictly observed could result in damage to, or destruction of, equipment or loss of mission effectiveness or long term health hazards to personnel. NOTE: An essential operating or maintenance procedure, condition, or statement, which must be highlighted. a

10 WARNING USING SOLVENTS/PAINTS Consider all solvents/paints potentially hazardous and flammable. Consult MSDS and be thoroughly familiar with health and safety aspects of material prior to use. HOT BRAKES If it is necessary to approach a wheel with a hot brake, do so either from directly in front or directly behind the aircraft. GROUND SUPPORT EQUIPMENT To prevent accidental falls, appropriate maintenance platforms/safety stands illustrated in appropriate workstand manuals or any other approved locally procured/manufactured safety stands/restraint equipment will be used when working (above 10 feet) on aircraft in a non-tactical environment. Do not attempt to lift any load when the hydraulic axle jack is tilted. Release air pressure in air compressor tank before performing maintenance on air compressors. Disconnect power before changing belts on electrically-driven compressors. Disconnect electrical power before opening or disassembling any part of electrical equipment. Install safety lock when an adjustable-height maintenance platform is in use. Ensure the air hose used with compressed air is safe for the pressure being handled. FIRE EXTINGUISHERS Halon type fire extinguishers, Monobromotrifluoromethane (CF3BR) and Bromocholormethane (CB) are odorless gasses. When used in confined areas, available oxygen for breathing may be depleted. Use supplied breathing air when using these gasses in enclosed spaces. HYDRAULIC FLUID To avoid contamination, do not use previously opened cans of hydraulic fluid. A new, sealed can of fluid must be opened and used. When opening can, clean top and use a clean sharp, unplated instrument to prevent contamination. COMPRESSED AIR Compressed air shall not be used for cleaning purposes unless reduced to less than 30 psi and then only with effective chip-guarding and personal protective equipment. NOISE HAZARD Noise levels reached during ground runup of Army aircraft are of a level that may cause permanent hearing loss. All personnel shall wear adequate hearing protection when working on aircraft with engines in operation. b