TM 9-2330-381-14
Table 3-1. Operator/Crew Troubleshooting Table - CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
APU - CONT
Step 3.
Check for loose jet start cock on air intake manifold.
Tighten thumbscrew on jet start cock (para. 2-3, item 7).
Step 4.
Check that decompression valve handle is downward in closed position.
Turn decompression valve handle downward to closed position (para. 2-3, item 9).
4.
WHITE, BLUE, BLACK, OR DARK GRAY EXHAUST SMOKE IS OBSERVED (AFTER WARMUP)
Notify unit maintenance.
5.
LOW OIL PRESSURE INDICATOR LIGHT IS LIT
Check for low oil level in crankcase.
a. Replenish with proper grade of oil (para. 3-3). The level should be between bottom and top
marks on oil level gage (dipstick).
b. If oil was added and oil pressure indicator light is lit, notify unit maintenance to check for low oil
pressure.
6.
ENGINE OVERHEATING
Step 1.
Check engine coolant level.
If coolant level is low, add coolant as required.
Step 2.
Check for low oil level in crankcase.
Replenish with proper grade of oil (para. 3-3). The level should be between bottom and top marks on
oil level gage (dipstick).
7.
BATTERY HAS LOW CHARGE
Step 1.
Check battery connections for looseness or corrosion.
Tighten connections (table 2-1, item 6, step e). If corroded, notify unit maintenance.
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