TK 55711-19-OP-EN
43
Electrical
Pretrip
500
Hrs
Annual
2,000
Hrs
Check condition of or service the following:
•
•
Check operation of protection shutdown devices.
•
•
Check alternator voltage.
•
Check alternator bearings. See Note.
•
•
Inspect battery terminals.
•
•
Inspect electrical connections.
•
•
Inspect wire harness for rubbing or damage.
•
•
Check electric condenser, evaporator and pre-cooler fans.
Note:
With belt removed spin alternator by hand. Listen for noise and verify bearings roll
freely.
Structural
Pretrip
500
Hrs
Annual
2,000
Hrs
Check condition of or service the following:
•
•
•
Visually inspect unit for fluid leaks (coolant, oil, refrigerant).
•
•
•
Visually inspect unit for damaged, loose or broken parts.
•
Check APU mounting bolts and brackets for cracks, damage, and poor
alignment. Verify tightness and torque to 100 ft/lbs (135.6 N•m) for
the claw mount, or 200 ft/lbs (271.2 N•m) for the direct frame mount.
