TM 55-1510-221-MTF
F13.
One arm light remains illuminated after torque of one
engine falls below 7% on retarded engine, AUTOFEATHER
ARM-TEST switch in TEST position).
a.
Defective No. 2 (6.5 PSI) torque pressure switch on
retarded engine.
b.
Defective autofeather dump valve.
F14.
Propeller slow to feather.
a.
Preformed packing leak at transfer tube or transfer housing.
b.
Defective propeller governor.
F15.
Propeller slow to unfeather.
a.
Defective propeller governor.
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