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Garmin recently released a Service Bulletin to bring all GSA 28 autopilot service up to the latest standards, and it is likely our Icon's have the older servos. I checked my logbook but couldn't find the service serials, will check the G3X Config page the next time I am at the plane.

This seems to be a broad version of https://www.iopa.org/threads/101-SB-...-(SB-091222-A)

"Since its introduction Garmin has implemented several design and manufacturing process improvements to improve GSA 28 reliability. The Service-Life Extension Program allows up to five years to exchange, under warranty, all affected GSA 28 servos for servos marked with Mod 1."

https://support.garmin.com/en-US/avi...O2EVxW6GmNTj6/

Affected Serials:

Part number 011-02927-00 with Serial Number range 2PG000000 - 2PG999999 are affected.

Part number 011-02927-20 with the Serial Number listed below are affected:
https://support.garmin.com/en-US/avi...r64Wg6ntYb3E7/

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I checked my GSA 28 serial numbers today, they are within the affected range.