As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED RIGHT AIR CONDITIONING PACK "SUPPLY TEMP HIGH" LIGHT ILLUMINATED. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED RIGHT AIR CONDITIONING TEMP SENSOR AND CONTROLLER. SYSTEM GROUND CHECK NORMAL OPERATION.