GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 59
190-01938-00 Revision 13
9.4.1.5 Yaw Trim Functional Check (If Installed)
1. Verify that the steps in Section 9.4.1 have been completed.
2. Depress the YAW TRIM switch in the TRIM LEFT direction.
3. Verify that the trim runs in the nose left direction.
4. While the trim is running, depress the AP DISC/TRIM INT switch on the pilot’s flight
controls and verify that the yaw trim stops running.
5. Depress the YAW TRIM switch in the TRIM RIGHT direction.
6. Verify that the trim runs in the nose right direction.
7. Manually adjust the trim all the way to the left stop.
8. While monitoring elapsed time, actuate the YAW TRIM Switch in the TRIM RIGHT
direction until the trim runs against the nose right mechanical stop.
9. Verify that the elapsed time for full travel of the yaw trim is within the tolerances specified
in the appropriate model-specific installation manual addendum (190-01937-XX).
10. While monitoring elapsed time, actuate the YAW TRIM Switch in the TRIM LEFT
direction until the trim runs against the nose left mechanical stop.
11. Verify that the elapsed time for full travel of the yaw trim is within the tolerances specified
in the appropriate model-specific installation manual addendum (190-01937-XX).
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