As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED ON DESCENT THE LEFT GENERATOR FAILED AND THE CROSSTIE LOCK-OUT LIGHT ILLUMINATED. EMERGENCY DECLARED FLIGHT LANDED DFW WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED LEFT GENERATOR CONTROL UNIT. SYSTEM GROUND CHECK NORMAL OPERATION.