As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DTW - INFLIGHT ORD-EWR. CREW REPORTED AUXILIARY POWER UNIT FAILED WITH RIGHT ENGINE GENERATOR ON PLACARD. FLIGHT DIVERTED DTW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED RIGHT ENGINE GENERATOR AND CONSTANT SPEED DRIVE. SYSTEM GROUND CHECK NORMAL OPERATION.