As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED ON CLIMBOUT TAIL COMPARTMENT TEMP HIGH LIGHT ILLUMINATED. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. RE-INSTALLED LEFT PACK HI PRESS BLEED FLEX DUCT THAT WAS LOOSE. SYSTEM GROUND CHECK NORMAL OPERATION.