TM 55-1510-215-10
4. Autopilot/electric trim system operation - Check
H
7. Autopilot AP DISC/TR IM INTER
as follows:
switch (control wheel) - Depress and hold. Attempt to
(1) Verify
that
all
autopilot
modes
are
run the electric trim up and down using the pilot's PITCH
disengaged.
TRIM switch (control wheel). The trim system should not
run either UP or DOWN.
(2) Preflight TEST button (autopilot mode
control panel) - Press and hold.
8. Repeat steps 1 through 6 - using the
copilot's PITCH TRIM switch.
(3) Autopilot mode annunciator panel displays
- Check all illuminated. TRIM display should flash at
9. Pilot's and copilot's PITCH TRIM
least four times, but no more than six times.
switches - Simultaneously move the pilot's switch
forward and the copilot's switch aft. The electric trim
(4) Aural trim alert - Listen for sound.
should run up.
(5) Yaw damp indicator light (autopilot mode
(10) Flight director switch (FD) (autopilot mode
control panel) - Check illuminated.
control panel) - Press on.
(6) ARM and ALERT display (altitude selector
(11) Autopilot switch (AP) (autopilot mode
panel) - Check displayed.
control panel) - ON.
(7) Computer flag
(pilot's
flight
director
indicator) - Check in view.
(12) Control wheel steering
switch
(CWS)
(control wheel) - Depress and hold.
(8) Preflight TEST button (autopilot mode
(13) Control wheel - Manually move to neutral
control panel) - Release.
position.
(9) Manual eectric trim system - Check as
l
(14) Control wheel steering switch (CWS) -
follows:
Release.
1. PITCH TRIM switch (pilot's control
wheel) - Move the left side of the trim switch to the
(15) Control wheel - Apply force to all axes.
Determine that autopilot can be overpowered.
forward and aft position, while moving the pitch-trim
control wheel. The pitch-trim solenoid should engage
(16) Autopilot AP DISC/TRIM INTER (control
making it more difficult to move the pitch-trim control
wheel) - Depress to disconnect autopilot.
wheel, but the electric trim motor should not run. Move
the right side of the trim switch to the forward and aft
(17) Manual trim - Set for takeoff.
positions. The pitch-trim solenoid should not engage
(18) Autopilot switch (AP) (autopilot mode
and the electric trim motor should not run.
control panel) - ON.
2. Overpower capability - Check by
(19) ROLL TEST switch (control pedestal) -
moving the pilot's PITCH TRIM switch to the forward and
Hold to LT position for approximately two seconds.
aft positions while holding the manual pitch-trim control
Autopilot should disconnect and the aural alert should
wheel.
sound.
3. TRIM
TEST
switch
(pedestal
(20) Autopilot switch (AP) (autopilot mode
extension) - Depress and hold while operating the
control panel) - ON.
electric trim up and down using the pilot's PITCH TRIM
switch (control wheel).
(21) ROLL TES T switch (control pedestal) -
Hold to RT position for approximately two seconds.
4. TRIM annunciator display (autopilot
Autopilot should disconnect and the aural alert should
annunciator panel) - Check displayed.
sound.
5. Aural trim alert - Listen for sound.
(22) Autopilot switch (AP) (autopilot mode
6. TRIM
TEST
switch
(pedestal
control panel) - ON.
extension) - Release.
Change 5 8-10A
