As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED ALL INSTRUMENTS, COCKPIT LIGHTS, CHIMES AND BELLS STARTED FLASHING. FOUND RIGHT ENGINE GENERATOR INOPERATIVE. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED BCU. SYSTEM GROUND CHECK NORMAL OPERATION.