TM 9-6115-664-13&P
Section III. OPERATOR MAINTENANCE PROCEDURES
3-4. GENERAL.
This section contains information on the maintenance of the APU that is the responsibility of the operator. If a
procedure is not located in this chapter, you are not authorized to perform it.
WARNING
Never service, inspect, or perform maintenance on the APU while engine is
running. Always shut down unit before servicing. Allow engine to cool before
handling components. Failure to do so can result in severe bums and injuries.
3-5. FUEL MODULE AND FUEL HOSES.
a.
Open top lids on APU and inspect inside of enclosure for evidence of fuel leakage. Inspect engine fuel hoses for
cuts, tears, or evidence of deterioration. Check that hoses are securely fastened to fittings.
b.
Slide cover latches (1, Figure 3-1) back to disengage from screws, and remove fuel module cover (2). Inspect
fuel hoses for cuts, tears, or evidence of deterioration. Check that hoses are securely fastened to fittings. Inspect for
signs of leakage.
c.
Inspect electrical wiring inside fuel module housing for damage. Check connectors for security of attachment.
d.
If damage is found, notify unit maintenance personnel for repair.
3-6. FUEL FILTER WATER SEPARATOR.
a.
Open top rear lid on APU to gain access to fuel module.
b.
Slide cover latches (1, Figure 3-1) back to disengage, and remove fuel module cover (2). Inspect fuel hoses for
cuts, tears, or evidence of deterioration. Check that hoses are securely fastened to fittings. Inspect for signs of leakage.
c.
Inspect separator bowl (3) for trapped water. Drain water by turning drain valve (4). After water is drained, close
drain valve.
d.
Fit fuel module cover (2) onto fuel module and secure using cover latches (1). Close top rear cover and secure
by turning lid latches.
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