As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - (REPEAT ITEM) CREW REPORTED TAIL COMPARTMENT HIGH TEMPERATURE LIGHT ILLUMINATED. EMERGENCY DECLARED FLIGHT RETURNED PHX LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND LEFT PERI AIR SEALS LEAKING NEAR HEAT EXCHANGER. REPLACED SEALS. SYSTEM GROUND CHECK NORMAL OPERATION.