TM 55-1510-222-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
c. Rudder boost /yaw control test
switch - RUDDER BOOST.
Check that RUDDER BOOST
annunciator light is illuminat-
ed.
d. Rudder boost /yaw control test
switch - Off (center). Check
that RUDDER BOOST annun-
ciator light is extinguished.
e. Rudder boost /yaw control test
switch - RUDDER BOOST.
f. Yaw
damper
pushbutton
switch - Depress to engage yaw
damper. Check that YD ENG
annunciator is illuminated.
g. Left power lever - Advance. At
a torque differential of approx-
imately 60%, observe that the
YD ENG annunciator light ex-
tinguishes, and that the left
rudder pedal begins to move
forward. Check that increasing
power results in increasing rud-
der pedal deflection.
h. Left power lever - Slowly re-
tard. Observe that the YD
ENG annunciator light may
flicker at a torque differential
of approximately 50%.
i. Repeat steps g and h for the
right engine.
*14. Autofeather system - Check as fol-
lows:
a. Autofeather switch - Hold to
TEST (ARM lights should re-
main extinguished).
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