Pilot’s Operating Handbook Section 906
EXTRA 500 S-TEC System 55X Autopilot
c With trim operating Nose UP and DN - grasp manual trim
control and overpower electric trim to stop trim action.
d Operate each half of the trim switch separately - trim should not
operate unless both switch knob segments are moved together.
e With Trim Operating - Depress
AP DISC (trim interrupt) switch
- Trim motion should stop while
AP DISC switch is depressed -
when released trim should operate normally.
2 Autotrim (Elevator)
a Engage HDG and VS modes of the autopilot.
b Grasp control and slowly apply forward pressure (NOSE
DOWN) - After approximately three (3) seconds trim should
run NOSE UP.
c Slowly apply aft pressure (NOSE UP) to control wheel - after
approximately three (3) seconds trim should run NOSE DOWN.
d Move manual
TRIM switch UP or DN - Autopilot should
disconnect and trim operates in the commanded direction.
(
TRIM switch will disconnect autopilot only when a pitch mode
is engaged.)
e Reengage autopilot HDG and VS Modes and depress
AP DISC
(trim interrupt) switch - Autopilot should disconnect.
f Retrim aircraft for take-off - Check all controls for freedom of
motion and to determine that the autopilot and trim have
disconnected.
If either the Manual Electric or Autotrim fails any portion of the
above check procedure, move the
AUTOPILOT PITCH TRIM
switch
OFF and do not attempt to use the trim system until the
fault is corrected. With the
AUTOPILOT PITCH TRIM in OFF
position the autopilot trim indicators and audio system will
return to operation.
If the electric trim system suffers a power failure in flight the
system will automatically revert to the in motion indicator TRIM
and to the audio horn (via audio panel). If this occurs turn the
AUTOPILOT PITCH TRIM switch in OFF position and trim
manually, using the indicators until the fault can be located and
corrected.
26. January 2011
906-7
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