As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD INFLIGHT T2079/07MAY - TAIL COMPARTMENT TEMPERATURE HIGH INDICATION ILLUMINATED DURING CLIMB. LIGHT EXTINGUISHED IN ABOUT FIVE MINUTES. RETURNED TO ORD AND LANDED WITHOUT INCIDENT. FOUND WATER SEPARATOR DUCT AT FORWARD RIGHT SIDE OF AFT TAIL COMPARTMENT BLOWN. REPLACED BLOWN DUCT ON FORWARD RIGHT SIDE OF AFT TAIL COMPARTMENT. SYSTEM GROUND CHECKED NORMAL OPERATION.