As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAIL COMPARTMENT TEMPERATURE HIGH LIGHT ILLUMINATED AFTER TAKEOFF. FLIGHT RETURNED TO ATL AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND BLOWN DUCT BETWEEN RIGHT PACK VALVE AND FLOW CONTROL VALVE. REPLACED DUCT, OPERATIONAL CHECK NORMAL.