TM 1-1520-238-23
6-197
6.40.
ENGINE NOSE GEARBOX PRELOAD SHIM REMOVAL/INSTALLATION (AVIM)
6.40.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
6.40.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
Light duty laboratory apron (item 27, App H)
0.000 - 6.000-inch outside micrometer caliper set
(item 52, App H)
0.000 - 0.125-inch dial indicator depth gage (item 145,
App H)
Chemical protective gloves (item 154, App H)
Adjustable air filtering respirator (item 262, App H)
Materials/Parts:
Cloth (item 52, App F)
Dry cleaning solvent (item 74, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
6.39
Engine nose gearbox rotor output shaft seal
removed
NOTE
This task is typical for either No. 1 or No.
2 engine nose gearbox preload shim.
6.40.3. Removal
a. Remove preload shim (1) from engine nose
gearbox (2).
6.40.4. Cleaning
a. Clean removed preload shim. Use dry cleaning
solvent (item 74, App F) and cloth (item 52,
App F).
6.40.5. Inspection
a. Check preload shim for cracks and distortion.
None allowed.
GO TO NEXT PAGE
1
M04-3812-1
2
