As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - RUNAWAY STABILIZER TRIM. RUN WAY NOSE DOWN. STOPPED WITH CONTROL WHEEL SWITCHES IN NOSE UP. AUTOPILOT NEVER USED. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED ALTERNATE STABILIZER TRIM MOTOR. SYSTEM GROUND CHECKED NORMAL OPERATION.