As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 0030, LAS-PHL: DURING CRUISE, APU SHUTDOWN WHILE THE RT GENERATOR WAS ALREADY ON MEL. FLIGHT DECLARED AND DIVERTED. MAINTENANCE SECURED THE APU OIL FILL PORT FITTING. THE RT IDG WAS REPLACED TO CLEAR THE RT GENERATOR MEL ON THE OVERNIGHT. NO FURTHER DIFFICULTIES. THE APU OIL FILL AND DRAIN COUPLINGS WERE BOTH REPLACED AS WELL FOR PRECAUTIONARY REASONS.