As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TUL - INFLIGHT DFW-ORD. CREW REPORTED AUXILIARY POWER UNIT FAILED WITH RIGHT GENERATOR ALREADY ON PLACARD. FLIGHT DIVERTED TUL LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED THE AUXILIARY POWER UNIT GENERATOR CONTROL UNIT. ADJUSTED VOLTS ON THE RIGHT GENERATOR AND REPLACED THE RIGHT GENERATOR POWER RELAY. SYSTEM GROUND CHECK NORMAL OPERATION.