As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MEX - CREW REPORTED TAIL COMPARTMENT OVERHEAT LIGHT ILLUMINATED ON CLIMBOUT. ACCOMPLISHED QRH AND LIGHT WENT OUT. EMERGENCY DECLARED FLIGHT RETURNED MEX LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. TIGHTENED LEFT ENGINE AUGMENTATION VALVE SENSING LINES AND LEFT AIR CONDITIONING PACK PRIMARY HEAT EXCHANGER RUBBER SLEEVE. REPLACED BOTH OVERHEAT SENSORS (MPN 1173T0640). SYSTEM GROUND CHECK NORMAL OPERATION.