As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW ENROUTE ON FLIGHT 1664 TAIL COMPARTMENT HIGH TEMPERATURE LIGHT CAME ON WHILE CLIMBING THROUGH 12000 FEET. IT WOULD GO OUT AT REDUCED THRUST AND CLIMB POWER AND THEN COME BACK ON. RETURNED DFW AND LANDED WITHOUT INCIDENT. REPLACED PERI-SEALS IN RT A/C PACK SUPPLY COUPLING. SYSTEM GROUND CHECKED NORMAL OPERATION. CLOSED.