TM 1-1520-238-23
Change 5
1-243
1.74.
APU OPERATING INSTRUCTIONS – USING BATTERY POWER
1.74.1. Description
This task covers:
Operating Instructions.
1.74.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Personnel Required:
67R
Attack Helicopter Repairer
One person to assist
References:
TM 1-1270-476-20
TM 1-1520-238-T
TM 1-5855-265-20
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
1.134
Maintenance headset con-
nected
TM 1-1520-238-T
Fuel system – visual check
completed
1.13
Aft fuel tank level checked
9.40
Battery connected
CAUTION
Only certified personnel are authorized to operate the APU. Failure to comply could result in equip-
ment damage.
1.74.3. Operating Instructions
a. Verify correct main transmission oil level right sight indicator (para 1.32).
b. Verify correct primary hydraulic fluid level (para 1.34).
c. Open access door RN5 (para 2.2).
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