As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED TAIL COMPARTMENT TEMPERATURE HIGH LIGHT ILLUMINATED. EMERGENCY DECLARED, FLIGHT RETURNED TO DEPARTURE, LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. REPLACED LT AUG VALVE SENSE LINE AND RT AIR CYCLE MACHINE. SYS GROUND CHECK NORMAL OPERATION.