TM 55-1510-221-CL
8.
Elevator trim control switch - ON.
9.
Control wheel - Hold to mid travel.
10.
AP button - Press. AP ENGAGE/YD ENGAGE annunciators on.
11.
Deleted.
12.
Deleted.
13.
Control wheel - Hold aft of mid travel. Trim wheel should run nose down after approximately 3 seconds. Trim
down annunciator should illuminate after approximately 8 seconds.
14.
Control wheel - Hold forward of mid travel. Trim wheel should run nose up after approximately 3 seconds, trim
up annunciator should illuminate after approximately 8 seconds, and AP TRIM FAIL annunciator and MASTER
WARNING flasher should illuminate after approximately 15 seconds.
WARNING
The elevator trim system must not be forced beyond the limits which are indicated on the
elevator trim tab indicator.
15.
AP/YD & TRIM DISC Button - Depress through second level. Autopilot and yaw damper should disengage and
ELECT TRIM OFF annunciator should illuminate. AP ENG and YD ENG annunciators on instrument panel
should flash 5 times.
16.
Elevator trim control switch - OFF, then ON. (ELEC TRIM OFF annunciator should extinguish).
17.
AP button - Re-engage.
18.
Turn controller - Check that control wheel follows in each applied direction, then center.
19.
Pitch wheel - Check that trim responds to pitch wheel movement. (UP TRIM and DN TRIM annunciators may
illuminate).
C2 P-6
