TM 1-1520-238-23
6-172
Change 8
6.36.
ENGINE NOSE GEARBOX AND QUILL SHAFT REMOVAL/INSTALLATION
6.36.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
6.36.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
Electrical tool kit (item 378, App H)
Light duty laboratory apron (item 27, App H)
5/16 x 1/4-inch drive open end box socket wrench
crowfoot attachment (item 83, App H)
Industrial faceshield (item 129, App H)
0.000 - 0.125-inch dial indicator depth gage (item 145,
App H)
Chemical protective gloves (item 154, App H)
30 - 150 inch-pound 1/4-inch drive click type torque
wrench (item 435, App H)
Materials/Parts:
Packing (4)
Lubricant (item 114, App F)
Petrolatum (item 138, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
68X
Armament/Electrical System Repairer
Two persons to assist
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1520-238-T
TM 55-1500-323-24
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.123
Engine nose gearbox fairings and shrouds
removed
1.28
Engine nose gearbox oil drained
6.2
No. 1 or No. 2 drive shaft removed
NOTE
This task is typical for either No. 1 or No. 2 engine nose gearbox.
6.36.3. Removal
a. Enter pilot station (para 1.56). Observe all safety precautions.
b. On pilot center breaker panel, open LT CAUT circuit breaker.
c. Enter CPG station (para 1.56). Observe all safety precautions.
d. On CPG left console circuit breaker panel No. 1, open EMER BATT CAUT circuit breaker.
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