As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE, TAIL COMPARTMENT HIGHT TEMPERATURE LIGHT ILLUMINATED WHILE CLIMBING THROUGH 17,000 FEET. TURNED HIGHT PRESSURE BLEED OF AIR CONDITIONING. CLOSING OF LEFT THROTTLE AND LEFT PACK EXTINGUISHED LIGHT. RETURNED AND LANDED WITHOUT INCIDENT. REPLACED TAIL COMPARTMENT HIGH TEMPERATURE SENSOR. SYSTEM GROUND CHECKED NORMAL OPERATION.