As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STABILIZER TRIM FAULTS DUE TO AN UNSCHEDULED STAB TRIM MOVEMENT & NO DEFINITIVE FINDINGS DURING TESTING IAW AM1568 & PTT 8132005. ACCOMPLISHED A MACH TRIM & SPEED STABILITY TEST IAW MM22-24-00 P501. REPLACED THE STAB TRIM ELEVATOR ASYM MODULES LT & RT & RECORDED NO FAULTS IAW AMM27-09-00.