TM 1-1510-224-MTF
F13.
One autofeather 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 (3.1 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.
Defective propeller governor.
TROUBLESHOOTING GUIDE G - HYDRAULIC
CONDITION
PROBABLE CAUSE
G1.
Solid pedal, no brakes.
Brake linings worn beyond allowable limits.
G2.
Spongy brakes.
a. Air in brake hydraulic system.
b. Low hydraulic fluid.
G3.
Unable to hold brake pressure.
a. Leak in brake hydraulic system.
b. Brake cylinder seal leaking.
c. Master cylinder seal leaking.
G4.
Brake pedals bottom, no brakes.
a. Broken or leaking hydraulic lines.
b. Brake cylinder seal failure.
c. Master cylinder seal leaking.
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