TM 1-1510-225-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
trim motion after approxi-
mately 3 seconds.
(3) Press right rudder - Note left
rudder trim motion after
approximately 3 seconds.
(4) Press left rudder - Note right
rudder trim motion after
approximately 3 seconds.
(5) Select HDG mode - Observe
FD commands and control
wheel motion correspond to
movement of the heading
selector knob.
(6) AP DISC & TRIM INTRPT-
Press and release. Note auto-
pilot disconnection, flashing
AP annunciation, and aural
disconnect tone.
(e) Manual electric trim - Check.
(1) Pilot and copilot control
wheel trim switches - Check
Operation of the electric trim switch system
should occur only by movement of pairs of
switches. Any movement of the elevator trim
wheel while depressing only one switch element
denotes a trim system malfunction. The AP/TRIM
POWER switch must be turned OFF and flight
conducted only by manual operation of the trim
wheel. Do not use autopilot.
(2) Pilot and copilot trim switches
- Check individual element for
no movement of trim, then
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