As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED AUXILIARY POWER UNIT FAILED AND LEFT ENGINE GENERATOR ON PLACARD. EMERGENCY DECLARED RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED LEFT ENGINE GENERATOR AND CONSTANT SPEED DRIVE. SYSTEM GROUND CHECKED NORMAL OPERATION.