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 HIGH LIGHT ILLUMINATED DURING CLIMB OUT. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED BROKEN AIR CYCLE MACHINE OUTLET CLAMP & HEAT EXCHANGER BOOT THAT WAS LEAKING. SYSTEM GROUND CHECKED NORMAL OPERATION CLOSED.