TM 55-1510-221-MTF
TROUBLESHOOTING GUIDE E - POWER
PLANT
CONDITION
PROBABLE CAUSE
E1. LOW IDLE speed is either high or low.
a.
LOW IDLE speed improperly adjusted.
E2. HIGH IDLE speed is either high or low.
a. HIGH IDLE speed improperly adjusted.
E3. Low or high torque is observed during torque
check.
a. Barrel adjustable stop is improperly adjusted.
E4. Reverse torque, N1, and propeller RPM is too
high or low.
a. Reverse adjusting screw Is improperly ad-
justed.
E5.
Newly rigged engine accelerates faster or slower than
opposite engine.
a. Engine rigging, components, or engine is
mismatched.
E6. Power levers are not aligned.
a. Fuel control rod Improperly adjusted.
E7. High engine oil pressure.
a. Defective oil pressure indicating system
b. Defective pressure relief valve
E8. Low engine oil pressure.
a. Insufficient oil.
b. Defective oil pressure indicating system.
c. Dirty oil filter
d. Leak in oil lines or oil cooler.
e. Defective pressure relief valve
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