As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - LEFT AIR CONDITIONING PACK FAILED. RIGHT PACK WAS ON PLACARD. EMERGENCY DECLARED, LANDED DFW WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED FLOW CONTROL VALVE AND LEFT TURBINE INLET AND OUTLET OVERTEMP SWITCHES. SYSTEM GROUND CHECK NORMAL OPERATION.