9-62 FLIGHT CONTROLS / PITCH TRIM TAB
ICON A5 / MAINTENANCE MANUAL CHANGE C3
No
Special Tools Required
Digital level with 0.1° resolution and Alt Ref function, calibrated to manufacturer’s instructions.
Parts Required
None
Aircraft System and Number
06—Flight Controls
Consumables
None
1. Turn on the master switch and verify that the trim indicator light illuminates.
2. Hold the elevator so that its trailing edge aligns with the horizontal tail tips (take the average if
left and right align differently) throughout this procedure. Use adhesive tape between elevator
trailing edge and elevator tips to temporarily align the elevator to neutral deflection in alignment
with the horizontal tail tips.
3. Secure digital inclinometer to the top of the trim tab surface with double-sided tape. Ensure that
its long axis is perpendicular to tab hinge line and that it does not interfere with tab operation.
4. Operate the trim tab until its trailing edge aligns with that of the elevator. Set the Alt Ref function
of the inclinometer to set the display to zero.
5. Pull and hold the trim switch down/aft until the tab deflects to its TED limit. Record level reading
at maximum TED travel.
6. Push and hold the trim switch up/fwd until the tab deflects to its TEU limit. Record level reading
at maximum TEU travel.
7. If the tolerances are not met, adjust the trim tab fork in or out to achieve them. Once complete,
torque the jamb nut on the fork to 60 in-lb
f
and bend the cotter pin on the fork.
8. Turn off the master switch.
9. Remove inclinometer and any tape used to secure it to the elevator trailing edge.
RESULT:
Reg. No. of Aircraft
Date of Test:
Initials of Technician:
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