As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - (REPEAT ITEM) CREW REPORTED AFTER TAKEOFF TAIL COMPARTMENT TEMPERATURE LIGHT ILLUMINATED. ACCOMPLISHED QRH CHECKLIST AND LIGHT EXTINGUISHED AFTER ONE MINUTE. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED 8TH AND 13TH STAGE MIXING DUCT THAT WAS CRACKED AT WELD. SYSTEM GROUND CHECK NORMAL OPERATION.