As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAIL COMPARTMENT OVERHEAT INDICATION ON CLIMB OUT. LEFT AIR CONDITIONING PACK WAS TURNED OFF AND LIGHT EXTINGUISHED AFTER ONE MINUTE. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED DUCT. SYSTEM GROUND CHECKED NORMAL OPERATION. (CLOSED)