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 DURING CLIMB TAIL TEMP HIGH LIGHT ILLUMINATED. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND LEAK COMING FROM PERI AIR SEALS ON DUCT TO HEAT EXCHANGER ON LEFT SIDE. REPLACED SEALS. SYSTEM GROUND CHECK NORMAL OPERATION.