As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW FOLLOWED ABNORMAL CHECKLIST AND TURNED OFF AUTOPILOT WHEN THEY RECEIVED A MASTER CAUTION "AUTOPILOT RIGHT TRIM" MESSAGE. MAINTENANCE PERFORMED FUNCTIONAL TEST OF AILERON TRIM SYSTEM. THE FUNCTIONAL AND OPERATIONAL TESTS WERE GOOD. THE OPERATIONAL CHECK FLIGHT WAS GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.