As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED UNABLE TO PRESSURIZE AIRCRAFT. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED PRESSURIZATION CONTROL PANEL AND R2-258 RELAY. SYSTEM GROUND CHECK NORMAL OPERATION.