TM 1-1510-224-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
PRIOR TO MAINTENANCE TEST FLIGHT (CONT)
WARNING
If the SBY annunciator on the flight director mode
selector does not illuminate within 10 seconds after
the avionics master switch is turns on, the autopilot
has failed self-test and is considered inoperative and
should not be used
CAUTION
Do not force the elevator trim system beyond the
limits which are indicated on the ELEVATOR trim tab
indicator
(n)
YD ENGAGE pushbutton switch-indicator
(autopilot controller) - Depress while
holding rudder boost/yaw control test
switch in TEST. Yaw damper should not
engage.
(o)
RUDDER BOOST/YAW CONTROL TEST
switch - RUDDER BOOST. Check
RUDDER
BOOST
annunciator
extinguished
(p)
Electric elevator trim - Check
(1)
ELEV TRIM switch - ON
(2)
Pilot and copilot trim switches
- Check operation.
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