As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STAB AND MACH TRIM DISENGAGED IN FLT RE-ENGAGED AFTER 15 SEC TRIM DISENGAGED AGAIN, RECEIVED STAB TRIM, MACH TRIM AND AUTO PILOT PITCH TRIM CASS MSG. FOUND STAB TRIM ACTUATOR FAILS CHANNEL 1 REMOVED AND REPLACED HORZ STAB TRIM ACTUATOR IAW AMM 27-42-01.