As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 9000 MSL, TAIL COMP TEMP HIGH LIGHT CAME ON. AFTER COMPLETION OF EMERGENCY CHECKLIST, WAS UNABLE TO KEEP THE TEMP HIGH LIGHT OUT. AIR TURN BACK. FOUND GROUND AIR COND CHECK VALVE UPPER CONNECTOR DUCT BLOWN. REPLACED BLOWN CONNECTOR DUCTS. OPERATED RT A/C PACK, OPS AND LEAK CHECKED GOOD IAW MM 21-20-00-5.