As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT CAPTAINS AUTO PILOT COMMANDED AN UNCONTROLLED NOSE UP TRIM DURING CLIMB. ADDITIONALLY, IT COMMANDED A CLIMB WHEN LEVEL AT CRUISE. FOUND DETENT ROLLER SPRING MAIN HORIZONTAL STAB TRIM RELAY UPPER SPRING MISSING. REPLACED SPRING AND RAN STAB, OPERATION NORMAL.