TM 55-1510-222-CL
(1) Pilot and copilot. Check individual element for no movement of trim, then check proper operation of
both elements.
(2) Check pilot switches override copilot switches while trimming in opposite directions, and trim moves
in direction commanded by pilot.
c.
Check pilot and copilot trim disconnects while activating trim.
d.
Elevator trim switch - OFF then ON (ELECT TRIM OFF annunciator extinguishes).
AUTOFEATHER
1.
Power levers - Approximately 25% torque.
2.
Autofeather switch - Hold to TEST (both AUTOFEATHER annunciators illuminated).
3.
Power levers - Retard individually.
a.
At 14% to 20% torque - Opposite annunciator extinguished.
b.
At 7% to 13% torque - Both annunciators extinguished (propeller starts to feather).
NOTE
The power lever may have to be lifted and pulled towards the ground fine gate in order to
attain the 7% to 13% torque. Autofeather annunciators will illuminate and extinguish with
each fluctuation of torque as the propeller feathers.
c.
Return power lever to approximately 25% torque.
4.
Repeat above procedure with other engine.
5.
Autofeather switch - ARM.
P-7
