As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAIL COMPARTMENT HIGH TEMPERATURE WARNING. AN EMERGENCY WAS DECLARED AND LANDED WITHOUT INCIDENT. TAIL COMP TEMP HI LIGHT ILLUMINATED DURING CLIMB. COMPLIED WITH QRH PROCEDURES, THE LIGHT EXTINGUISHED AND RETURNED TO DEPARTURE. AIRCRAFT WAS GROUNDED. REPLACED GROUND AIR CONDITIONING CHECK VALVE AND DUCT AS WELL AS HIGH TEMPERATURE HOSES. ALL OPERATIONS AND LEAK CHECKS NORMAL.