TM 1-1520-238-23
Change 8
6-327
6.75.
MAIN TRANSMISSION TAIL ROTOR DRIVE SEAL REPLACEMENT
6.75.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
6.75.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
Light duty laboratory apron (item 27, App H)
3/4 x 6-inch long driftpin (item 113, App H)
Industrial faceshield (item 129, App H)
Chemical protective gloves (item 154, App H)
Adjustable air filtering respirator (item 262, App H)
Materials/Parts:
Packing (2)
Wicking (10)
Grease (item 88, App F)
Petrolatum (item 138, App F)
Sealing compound (item 161, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access doors T250L, T250R, T290L,
T290R, and L325 opened; panel L200 or
R200 removed
1.32
Main transmission oil system drained
2.84
Forward catwalk removed
6.5
No. 3 tail rotor drive shaft removed
WARNING
FLIGHT SAFETY PART
The main transmission is a flight safe-
ty 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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M04-482-1
