TECHNICAL MANUAL AVIATION UNIT MAINTENANCE (AVUM) AND AVIATION INTERMEDIATE MAINTENANCE (AVIM) MANUAL FOR GENERAL AIRCRAFT MAINTENANCE
(GENERAL MAINTENANCE AND PRACTICES) VOLUME 1
*This manual together with TM 1-1500-204-23-2 through TM 1-1500-204-23-10, dated 31 July 1992, supersedes TM 55-1500-204-25/1, dated 6 April 1970, including all changes.
DlSTRIBUTIONSTATEMENT 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 Change 1.
PRECAUTIONARY DATA Personnel performing instructions involving operations, procedures, and practices which are included or implied in this technical manual shall observe the followinginstructions. Disregard of these warnings and precautionary information can cause serious injury, death, or an aborted mission. 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, couldresult 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.WARNING ELECTRICAL TESTS Electrical power up to 500 volts is used in testing the equipment. Exercise extreme caution during these tests. Ensure the equipment is grounded and operated in accordance with the operator's manual. Never operate electrical equipment during rain or while standing in water or wet areas. Use rubber mats to stand on. ELECTRICAL EQUIPMENT All switches and electricalequipment shall be of the enclosed explosion-proof type. grounded to avoid the danger of igniting test fluid fumes or creating electrical shock.. USING SOLVENTS/PAINTS Standard precautions such as fire prevention and adequate ventilation shall be exercised when using solvents or applying primer and coating. Wear gloves or gauntlets when handling solvents as solvents may cause skin disorders. Cements andsolvents used to repair liferafts are flammable and shall be treated as such. Never smoke or permit any type of open flame near when using cements or solvents. Dichloromethane (methylene chloride) vapor is heavier than air, adequate ventilation shall be provided for working personnel. Dichloromethane (methylene chloride) is toxic when vapors are inhaled over an extended period of time. All metalapparatus shall be
TM 1-1500-204-23-1 HANDLING PLASTICS Wear gloves to protect hands while handling hot plastic. Boiling water shall not be used for heating acrylate base plastics. Provide adequate ventilation when working with Furane Plastics, Epocast H-991-A, Furane hardener 941, or equivalents as these materials are toxic. LUBRICATING OIL Lubricating oil, MIL-L-7808 or MIL-L-23699,contains an additive which is poisonous and absorbed readily through the skin Do not allow oil to remain on skin. Wash with soap and water. FUEL When servicing aircraft or support equipment, clean up spilled fuel with cotton mops or cotton rags. Wash off any fuel on hands, body, or clothing. HANDLING ACID Wear protective clothing when mixing acid with water. Always pour acid into water, never waterinto acid. HANDLING PYROTECHNIC FLARES Handle pyrotechnic flares with the same care as high explosives. MAGNESIUM ALLOY FIRE Do not use water or any standard liquid or foam-type fire extinguishers on a magnesium alloy fire, as they may cause an explosion. Use dry sand or talcum powder, Federal Specification U-T-30. AIRCRAFT ENGINE VALVES Severe personal injury may result when sodium-filled valves...