TM 9-2350-267-10
TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AUXILIARY POWER UNIT ENGINE - Continued
19. APU ENGINE STARTS, THEN STALLS OR RUNS ROUGHLY
Step 1.
Step 2.
Step 3.
Check for water in fuel filters.
Drain filters (p 3-47).
Check air intake filter for restrictions.
Remove restrictions or clear filters (p 3-47),
Check fuel level.
Fill fuel tanks (p 3-25).
20. APU ENGINE DIFFICULT TO START
Step 1. Check for water in fuel filters.
Drain filters (p 3-47).
21. APU ENGINE HARD TO START ONLY IN COLD WEATHER
Step 1. Check to see if plenum door in APU compartment is open.
Open plenum door.
22. APU ENGINE OVERHEATING
Step 1.
Step 2.
Check air intake passage for obstruction.
Remove obstruction.
Check crankcase oil level (LO 9-2350-267-12).
Refill with oil as necessary.
3-12
