CHAPTER 27
PAGE 29
PAGE DATE: 21. March 2014
MAINTENANCE MANUAL EXTRA 300LT
27-30-02 Trim Tab
Removal/Installation
1 Loosen bowden cables. If a replacement is necessary order
new cable.
2 Disconnect the safety cotter pins and remove the hinge pins.
3 Install in reverse sequence of removal.
Rigging
Refer to Figure 19.
1 Secure the rear control stick in normal position.
2 Adjust trim to slightly below middle position. 6th LED on
trim position indicator illuminates (1).
3 Check trim lever (4) is in neutral position (angle of 11°,
(tolerance ±2°) to the firewall plane or 79° to upper
longerons). If it is not, proceed as follows:
a Remove the trim servo rod (2) from the trim servo (3) and
the trim lever (4) by removing the clevis pins with cotter
pins and washers.
b Loosen the counternut from the adjustable rod end and screw
the rod end out or in as necessary to adjust the fuselage
bellcrank in neutral position (default measure-ment is 147
mm). Ensure rod end is screwed in for min. 10 mm.
c Fasten the counternut.
d Renew locking varnish.
e Reconnect the rod end. Use new cotter pins.
4 Bring the trim tab (8) in 0°-position (upper surfaces of
elevator (7) and trim tab (8) are in the same plane) by
replacing the linkage bolts (5 and/or 9).
5 Trim to extreme positions and check if trim tab travel is up
35° and down 27° (tolerance ±2°). If it is not, check free
travel of the trim lever (4) and bowden cable (6).
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