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Fluctuating torque indication. | Up
TM-1-1510-225-MTF Army Model C-12 Aircraft Manual | Next
Propeller governor test system inoperative on one engine. |
E27.
E28.
E29.
TM l-1510-225-MTF
f. Sticking beta mechanism.
Fluctuating gas generator speed.
a. Faulty instrumentation system.
b. Defective power turbine governor.
c. Defective engine driven primary high pressure
fuel pump shaft seal.
d. Defective or out of adjustment propeller over-
speed governor.
e. Defective propeller primary governor.
f. Sticking beta mechanism.
Fluctuating torque and propeller RPM.
a. Defective or out of adjustment propeller over-
speed governor.
b. Defective propeller primary governor.
c. Sticking beta mechanism.
Fuel leaking overboard.
a. Fuel cap not seated and anti-siphon valve defec-
tive.
b. Filler cap or preformed packing defective and
anti-siphon valve defective.
c. Fuel transfer module defective.
d Fuel level transmitter defective.
TROUBLESHOOTING GUIDE F - PROPELLERS
CONDITION
PROBABLE CAUSE
F1.
Propeller governor system partially or completely
iuoperative.
F2.
a. Defective propeller governor test switch.
Propeller governor test system inoperative.
a. Tripped propeller governor test circuit breaker.
b. Defective wiring.
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