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 TM 1-1510-223-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
PRIOR TO MAINTENANCE TEST FLIGHT (CONT)
(7) YD ENGAGE pushbutton switch-indicator
(autopilot controller) - Depress. Check that
yaw damper engages, and that YD
ENGAGE switch-indicator on the autopilot
controller and the remote annunciator on the
instrument panel above the EADI's
illuminates.
(8) RUDDER BOOST/YAW CONTROL TEST
switch (pedestal extension) - TEST. Check
that RUDDER BOOST annunciator above
the EADI's illuminates, yaw damper
disengages, YD ENGAGE switch-indicator
on the autopilot controller extinguishes,
and the YD ENG remote annunciators
above the EADI's flash 5 times.
(9) YD ENGAGE pushbutton switch-indicator
(autopilot controller) - Depress
while
holding rudder boost/yaw control test switch
in TEST. Yaw damper should not engage.
(10) RUDDER BOOST/YAW CONTROL TEST
switch - RUDDER BOOST. Check RUDDER
BOOST annunciator extinguished.
2-24
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