Garmin GFC500 autopilot ALERT

30 Nov 2022 8:53 AM | Don Metz (Administrator)

Garmin GFC500 autopilot ALERT (May not apply to our planes)

 Garmin has found a problem with the optional GAD28 auto-trim for the GFC500 autopilot which could cause runaway nose-up trim.  This does NOT affect the basic GFC500 without the optional autotrim.  If you have auto-trim, you must immediately disable the autopilot by pulling and collaring the c/b and placarding the autopilot inop.  You can then take it to your Garmin shop to have the auto-trim disabled after which you can resume using the autopilot, manually trimming as needed when you get a TRIM light.  For more information, see the documents below or contact your Garmin dealer.

Service Alert 22109 Rev A is available at:

https://support.garmin.com/en-US/aviation/faq/mZwVwMogJ09ZLIPJgWTBJA

The recommended Service Bulletin 22110 Rev A is available at:

https://support.garmin.com/en-US/aviation/faq/s7SeFk9oh96I8qVfjtNbV8


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