TM 55-1510-215-MTF
F15. Both arm lights go out when one power lever is retarded
(engine torque 160-290 ft-lbs on retarded engine,
AUTOFEATHER ARM-TEST switch in TEST position).
a.
Defective No. 2 (6.5 PSI) torque pressure switch on retarded
F16. One arm light remains illuminated after torque of one engine
falls below 160 ft-lbs (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.
F17. Propeller slow to feather.
a.
Preformed packing leak at transfer tube or transfer housing.
b.
Defective propeller governor.
F18. Propeller slow to unfeather.
a.
Defective propeller governor.
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