As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THE RT AILERON TRIM ACTUATOR NOT RESPONDING TO CONTROL SWITCH INPUTS AND TRIPPING AFFECTED CIRCUIT BREAKERS. TROUBLESHOT TO INTERNALLY FAILED RT AILERON ROLL TRIM ACTUATOR. REPLACED THE ACTUATOR WITH A NEW ACTUATOR, ROLL TRIM SYS FUNCTIONAL CHECKS NORMAL. RECOMMEND ACTUATOR MFG INVESTIGATE ACTUATOR AT TEARDOWN FOR FAULT ANALYSIS. RECOMMEND AIRFRAME MFG CHECK DATABASE TO SEE IF AN ISOLATED OCCURENCE, OR A FLEETWIDE RECURRING PROBLEM.