TM 55-1510-219-MTF
c.
Air leaks at engine flanges.
E19.
Maximum operating TGT has been exceeded.
a.
Faulty indicating system.
b.
Excessive accessory power being pulled due to failure or
overload.
c.
Torque meter system indicator faulty.
d.
Air inlet and compressor contamination build-up.
E20.
TGT limited (turbine temperature is at maximum limit
before target torque is reached).
a.
Defective instruments.
b.
Improper operating procedure.
c.
Dirty compressor.
d.
Excessive accessory power being pulled due to failure or
overload.
e.
Defective compressor bleed valve.
f.
Torque meter system reading low.
g.
Bleed air leaks.
h.
High and low pressure bleed valve operation.
E21.
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.
E22.
Fluctuating fuel flow.
a.
Faulty instrumentation system.
3-22
