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 TM 55-1905-220-14-3
Table 3-3. Propulsion Engine - Abnormal Engine Operation
Troubleshooting (Cont).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
Lack of power (Cont).
Step 5.
Check for high return fuel temperature.
Refer to table 3-4.
Step 6.
Check for high ambient air temperature.
Check the ambient air temperature. A power decrease of .15 to .50 horsepower per cylinder,
depending upon injector size, for each 10 (5.5 ) temperature rise above 90F will occur.
F
C
Operate ventilation fans to provide a cooler source of air.
3.
Detonation.
Step 1.
Check for oil picked up by air stream.
a. Clean the air box and drain tubes to prevent accumulations that may be picked up by the
air stream and enter the enqine's cylinders.
3-36
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