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 TEMPERATURE OVERHEAT LIGHT ILLUMINATED. ACCOMPLISHED QRH AND LIGHT EXTINGUISHED. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED CLAMP FROM AIR CYCLE MACHINE TO HEAT EXCHANGER THAT WAS BROKEN. REPLACED JOINT SEALS ON LEFT PACK TO HEAT EXCHANGER THAT WERE LEAKING. SYSTEM GROUND CHECK NORMAL OPERATION.