Garmin started a Servo Service Life Extension Program for GSA28 Servos. Under this program certain GSA28 will be replaced with a 6 months extension warranty.
Replacement will be done through dealer network (in my case Northair Aviation).
Part number affected is GSA 011-02927-00 (elevator and probably aileron). Unfortunately i will not be able to check part number on roll-servo until i remove the servo from the wing.