As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI, THE CREW RECEIVED A TAT HEAT FAIL MESSAGE. CREW RETURNED TO THE GATE. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE TAT PROBE DEFECTIVE. TAT PROBE WAS REPLACED IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 34-10-00. OPERATIONAL CHECK GOOD AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.