As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED TAIL COMPARTMENT OVERHEAT WARNING ILLUMINATED DURING CLIMBOUT. PERFORMED QRH PROCEDURES AND LIGHT EXTINGUISHED. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED LEFT AND RIGHT TAIL COMPARTMENT SENSOR, LEFT FLOW CONTROL VALVE THAT WAS LEAKING AND LEFT AIR CYCLE MACHINE. SYSTEM GROUND CHECK NORMAL OPERATION.