As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5338, IAH TO VPS. AFTER TAKEOFF THE CREW RECEIVED A STAB TRIM CHANNEL 1 FAIL MESSAGE AND RETURNED TO IAH AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT AND FOUND FAULT CODES POINTING TO THE MOTOR CONTROL UNIT. THE MOTOR CONTROL UNIT WAS REPLACED AND THE TRIM SYSTEM OPS CHECKED GOOD DURING THE TEST FLIGHT. (S)