Garmin GFC 600 Pilot’s Guide
190-01488-00 Rev. B
21
AFCS
When the Yaw Damper is disengaged it is annunciated by the YD LED on the GMC
605 and the YD annunciation on the GI 285 flashing yellow for five seconds and then
extinguished.
MANUAL TRIM
Aircraft that do not have a pitch trim servo must be manually trimmed by the pilot.
Manual trim may also be required in the event of pitch trim servo failure. Mistrim
indication is provided when the autopilot is engaged to inform the pilot when manual
trim is needed.
On the GMC 605 a mistrim condition is indicated by the AP LED flashing yellow for
five seconds and then steady illumination. A message is displayed indicating the trim
axis and the direction. ELE TRM UP indicates that the pitch servo is holding excessive
nose up force and the pilot must manually trim the aircraft in the nose up direction to
alleviate the load and restore the aircraft to an in-trim condition. Once the aircraft is
in-trim the yellow AP LED is extinguished and the message is removed.
The GI 285 indicates a mistrim condition by flashing the TRIM annunciation in yellow
for five seconds and then steady. The TRIM annunciation is extinguished once the
mistrim condition is resolved.
NOTE:
The GI 285 does not provide any indication of mistrim axis or
direction. The pilot must look at the GMC 605 message for this information.
GMC 605 Mistrim Indication
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