TM 55-1510-222-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
BEFORE TAXIING (CONT)
(a) Control wheel - Hold
aft of mid travel. Trim
wheel should run nose
down after approxi-
mately 3 seconds. DN
TRIM
annunciator
should illuminate after
approximately 8 sec-
onds.
(b) Control wheel - Hold
forward of mid travel.
Trim wheel should run
nose up after approxi-
mately 3 seconds, UP
TRIM
annunciator
should illuminate after
approximately 8 sec-
onds, and AP TRIM
annunciator should il-
luminate after approxi-
mately 15 seconds.
(7) AP/YD & TRIM DISC
button - Depress to second
level. Autopilot and yaw
damper should disengage
and ELECT TRIM OFF
annunciator should illumi-
nate. AP ENG and YD
ENG annunciators on in-
strument panel should flash
5 times.
(8) Elevator
trim
control
switch - OFF, then on.
(ELEC TRIM OFF annun-
ciator should extinguish.)
(9) Autopilot - Re-engage.
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