TM 1-1510-224-CL
b.
Control wheel - Overpower slowly in both
directions.
WARNING
If the autopilot or yaw damper disengages
during the overpower test, the system is
considered non-operative and should not be
used. The elevator trim system must not be
forced beyond the limits which are indicated
on the elevator trim indicator.
5.
Elevator trim follow-up - Check as follows:
a.
Control wheel - Move aft of mid-travel. Trim wheel
should run nose down after approximately 3
seconds. TRIM DN
annunciator
(autopilot
controller) should illuminate after approximately 6
to
8
seconds,
and
AP
TRIM
annunciator
(instrument
panel)
should
illuminate
after
approximately 15 seconds.
b.
Control wheel - Move forward of mid-travel. Trim
wheel should run nose up after approximately 3
seconds. TRIM
UP
annunciator
(autopilot
controller) check illuminated after approximately 6
to 8 seconds. AP TRIM annunciators (instrument
panel) check illuminated after approximately 15
seconds.
6.
AP & YD/TRIM DISC switch (control wheel) - Depress to
first level. Check that autopilot and yaw damper
disengage, AP ENGAGE and YD ENGAGE switch-
indicators on the autopilot controller and remote
annunciators above the EADI's flash 5 times.
7.
Control wheel - Hold to mid-travel.
8.
AP ENGAGE switch - Re-engage.
9.
Turn knob - Check that elevator control trim wheel
follows in each applied direction, then center.
10.
Pitch wheel - Check that trim responds to pitch wheel
movements. (UP TRIM and DN TRIM annunciators may
illuminate.)
11.
Heading marker - Center and engage HDG. Check that
control wheel follows a turn in each direction.
12.
GO AROUND button (left power lever) - Depress.
Check that AP disengages and FD commands a wings
P-6
