As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW DUE TO ELECTRIC TRIM FAILED IN CRUISE AND STAB OUT OF TRIM LIGHT ILLUMINATED. THE AIRCRAFT LANDED SAFELY AT DFW WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED STAB TRIM MOTOR M01659 PER AMM 27-41-71. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECKS.