TM 1-1510-224-MTF
E23.
TGT limited (turbine temperature is at maximum limit
before target torque is reached).
a. Defective instruments, thermocouple, or wiring.
b. Improper operating procedure.
c. Dirty compressor.
d. Excessive accessory power being pulled due to failure or
overload.
e. Defective compressor bleed valve.
f. Damaged compressor.
g. Air leaks in engine flanges or fittings.
h. Hot section distress.
i. Torquemeter system reading low.
E24.
Fluctuating torque indication.
a. Faulty instrumentation system.
b. Defective power turbine governor.
c. Engine driven high pressure pump shaft seal leakage.
d. Defective or out of adjustment propeller overspeed
governor.
e. Defective propeller primary governor.
f. Sticking beta mechanism.
E25.
Fluctuating fuel flow.
a. Faulty instrumentation system.
b. Defective power turbine governor.
c. Engine driven high-pressure fuel pump shaft seal leaking.
d. Defective propeller overspeed governor.
e. Sticking beta mechanism.
E26.
Fluctuating TGT.
a. Faulty instrumentation system.
b. Defective power turbine governor.
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