As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - CREW REPORTED TAT PROBE EICAS MESSAGE APPEARED ON UPPER EICAS AND TAT ANNUNICATOR LIGHT ON OVERHEAD PANEL ALSO ILLUMINATED. EMERGENCY DECLARED, FLIGHT RETURNED LAX LANDED WITHOUT INCIDENT. REPLACED TOTAL AIR TEMPERATURE PROBE. SYSTEM GROUND CHECK NORMAL OPERATION.