As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TUS - CREW REPORTED TAIL COMPARTMENT HIGH TEMP LIGHT ILLUMINATED DURING CLIMBOUT. ACCOMPLISHED QRH PROCEDURES AND LIGHT WENT OUT. EMERGENCY DECLARED FLIGHT RETURNED TUS LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED RAM AIR VALVE AND THE FOLLWING WIRES - H362F22, H362H20 AND H362G20. SYSTEM GROUND CHECK NORMAL OPERATION.