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 TM 55-1510-218-MTF
PROCEDURE TROUBLESHOOTING
REFERENCE
BEFORE TAXIING (CONT)
(1) Control wheel - Overpower
slowly in roll and pitch
axis.
(2) Rudder pedals - Overpower
slowly in both directions.
i. Autopilot/yaw damp discon-
nect switch (control wheels) -
Depress to second level. Au-
topilot and yaw damp should
disengage and ELECT TRIM
OFF annunicator light should
illuminate. AP ENG and YD
ENG annunciators on instru-
ment panel should flash 5
times.
j. Pilot and copilot pitch trim
switches - Press pilot's switches
in the NOSE UP direction and
press copilot's switches in the
NOSE DN direction. The trim
system should run in the direc-
tion commanded by the pilot.
Any deviation requires that
electric elevator trim be turned
off and flight conducted using
only manual trim.
k. Elevator trim control switch -
OFF, then ON. ELEC TRIM
OFF annunciator light should
extinguish.
l. Autopilot engage switch (Au-
topilot control panel) - De-
press. Check that AP ENGAGE
and YD ENGAGE pushbuttons
flash.
2-32
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