TM 55-1510-219-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
(15) Propeller lever - Move out of feather.
Propeller tachometer must reach
1000 RPM in 30 seconds or less.
(16) Propellers - Synchronized.
(17) Power - As required.
h. Repeat procedure for opposite engine.
*11. Propeller autofeathering system
F14,15
and propeller unfeathering - Check as
follows:
a. Climb power - Set (N1 above 92%).
b. Autofeather switch - ARM.
c. Airspeed - 103 KIAS.
d. Propeller levers - Set 2000 RPM.
e. Condition lever (engine to be feathered) -
IDLE CUTOFF.
*f. Record the time from fuel cut-off until
propeller rotation is completely stopped
(no rotation). Autofeather time is a
function of oil temperature as shown in
figure 4. (Propeller is considered to be
feathered when the blades are individual-
ly visible to the human eye, but the
propeller is still rotating.)
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