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 TM
55-1510-218-MTF
PROCEDURE TROUBLESHOOTING
REFERENCE
BEFORE
TAXIING (CONT)
d. Engage-disengage switch (au-
topilot mode selector panel)-
ENG. Check that controls are
stiff.
e. HSI heading marker - Move
10 left and right. Verify that
flight director and control
wheels respond in the appropri-
ate direction.
f. Autopilot/yaw damp disengage
switch (control wheel) - Press.
Verify that autopilot disengages
and that flight controls are free.
g. Elevator trim switch-indicator
(control pedestal extension)-
Check on.
h. Autopilot switch (autopilot
mode selector control panel)-
ENG.
i. Autopilot pitch wheel (autopi-
lot pitch-turn control panel)
-Command 5 trim UP. Verify
that manual trim wheel moves
nose UP and AP trim light in-
dicates UP trim.
j. Autopilot pitch wheel (autopi-
lot pitch-turn control panel)-
Command 5 trim DN. Verify
that manual trim wheel moves
nose DN and AP trim light in-
dicates DN trim.
k. Pitch trim switch - Depress to
NOSE DN position and verify
that autopilot disengages and
A/P TRIM FAIL and MAS-
2-28
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