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 DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND WORN SEALS AT LEFT SUPPLY DUCT TO HEAT EXCHANGER. REPLACED SEALS, LEFT AND RIGHT TAIL COMPARTMENT TEMPERATURE SENSORS AND OPERATIONAL CHECK NORMAL.