As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THE EMER AILERON TRIM FAILED DURING PREFLIGHT CHECKS. TROUBLE SHOT & FOUND THE EMER AILERON TRIM ACTUATOR FAULTY. THE DEFECTIVE ACTUATOR PN 021127-01, SN 534 WAS REMOVED & AN OVERHAULED UNIT WAS INSTALLED. OPERATIONS CHECKED SATISFACTORY.