As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED RIGHT ENGINE GENERATOR TRIPPED IN FLIGHT, ACCOMPANIED BY AC CROSSTIE LOCKOUT LIGHT. ACCOMPLISHED QRH PROCEDURE AND RESTORED POWER WITH AUXILIARY POWER UNIT. EMERGENCY DECLARED FLIGHT LANDED DFW WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED RIGHT ENGINE CONSTANT SPEED DRIVE AND GENERATOR.