As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - CREW REPORTED TAIL COMPARTMENT TEMPERATURE HIGH LIGHT ILLUMINATED. EMERGENCY DECLARED FLIGHT RETURNED DEN LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. PNEUMATIC DUCT ON RIGHT SIDE OF TAIL COMPARTMENT CRACKED. REPLACED DUCT. SYSTEM GROUND CHECK NORMAL OPERATION.