TM 1-1520-238-23
6-335
6.77.
MAIN TRANSMISSION COUPLING HALVES REPLACEMENT
6.77.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
6.77.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
Light duty laboratory apron (item 27, App H)
1 1/8 x 3/8-inch drive open end socket wrench crowfoot
attachment (item 90, App H)
Industrial faceshield (item 129, App H)
Chemical protective gloves (item 154, App H)
0 - 600 inch-pound 3/8-inch drive dial indicator torque
wrench (item 447, App H)
Materials/Parts:
Packing
Petrolatum (item 138, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
1.32
Main transmission oil system drained
WARNING
FLIGHT SAFETY PART
The main transmission is a flight safety part. Failure to follow maintenance instructions may
result in serious injury or death of crewmembers and/or serious damage to the helicopter.
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