TM 55-1510-222-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
LOW SPEED SYSTEMS CHECK (CONT)
chometer must reach 1000
RPM in 30 seconds or less.
(16) Propellers - Synchronized.
(17) Power - As required.
g. Repeat procedure for opposite
engine.
*10. Propeller
autofeathering
system
F4-15
and propeller unfeathering - Check
as follows:
a. Autofeather switch - ARM.
b. Airspeed - 120 KIAS.
c. Propeller levers - Set 1700
RPM.
d. Power levers - Set as required
to arm autofeather system.
e. Condition lever (engine to be
feathered) - IDLE CUTOFF.
*f. Record the time from fuel cut-
off until propeller rotation is
completely stopped (no rota-
tion). Time to feather shall not
exceed 10 seconds. (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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