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Aircraft Service Manual
Jabiru Aircraft
Pty Ltd
JTM001-1
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
REVISION
1
Dated: Nov 2011
Issued By: SW
Page: 145 of 233
Figure 118
– Elevator Trim Handle Assy – Type 3
11.7 ELEVATOR TRIM
– AFT ASSEMBLY
11.7.1 DESCRIPTION
The elevator trim control system comprises a Trim Cable connected to a lubron block, so that the
cable is able to move the block fore and aft approximately 35mm. An aluminium rod is free to slide
through this lubron block and is centred by 2 compression springs. The output end of the rod is
connected to the Elevator Horn.
This assembly allows a spring-loaded connection between the elevator trim lever and the elevator.
This spring loading force is used to trim the aircraft.
11.7.2 OPERATIONAL CHECK
Movement of the Trim Lever FORE and AFT should result in movement of the Main Control FORE
and AFT and movement of the Elevator UP and DOWN.
WARNING
It is important to carry out this operational check whenever the trim cable has been disconnected
to ensure it has been correctly installed.
11.7.3 REMOVAL
Remove the ventral fin to allow access to the assembly.
Un-bolt and disconnect the trim shaft from the elevator. Use tape, seat belts or similar to apply full-
aft to the control column and hold it in place. This is to raise the elevator out of the work area and
prevent it from dropping back down.
Un-bolt the lubron block from the pivot plate and remove the spring-loaded shaft.
Un-bolt the control cable from the pivot arm and remove.
Un-bolt the pivot assembly from the fiberglass tail horn and remove from the aircraft.