As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: -- EMERGENCY DECLARED. DECESION WAS MADE TO RETURN TO DFW. AIRCRAFT LANDED OVERWEIGHT WITHOUT INCIDENT -- ELECTRIC STAB TRIM FAILED AFTER TAKEOFF. ALSO SPEED TRIM FAIL LIGHT ILLUMINATED. REMOVED AND REPLACED STAB TRIM MOTOR PER AMM 27-41-71.