As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SAN INFLIGHT T237/16JUL - REPEATER DURING CLIMB TAIL COMPARTMENT TEMPERATURE WARNING LIGHT ILLUMINATED. LIGHT EXTINGUISHED AFTER NUMBER ONE ENGINE TO IDLE AND LEFT PACK TURNED OFF. RETURNED TO SAN AND LANDED WITHOUT INCIDENT. FOUND BLOWN DUCT. REPLACED DUCT. SYSTEM GROUND CHECKED NORMAL OPERATION.