As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU SHUTDOWN AUTOMATICALLY INFLIGHT DUE TO MEL ON #1 IDG THIS PUT US IN A SINGLE AC SOURCE SITUATION RAN QRH AND DIVERTED TO KSMF. GROUNDED - YES. DIVERSION - FOUND CANNON PLUG BACKSHELL ON OIL PRESSURE MODULE LOOSE REMOVED AND INSPECTED PLUG AND PINS REINSTALLED APU OPS CHECK NORMAL. (REF 60588686)