As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS GROUNDED. DURING CRUISE, WITH THE #1 INTEGRATED DRIVE GENERATOR ON MEL DEFERRAL, APU WARNING OIL PRESSURE LIGHT ILLUMINATED FOLLOWED BY APU AUTO SHUT DOWN. CAPTAIN NOTIFIED DISPATCH THE APU GENERATOR HAD FAILED AND IT WAS DETEREMINED TO DIVERT THE AIRCRAFT TO SDF. FLIGHT DIVERTED TO SDF AND LANDED WITHOUT FURTHER INCIDENT. REPLACED APU OIL COOLER PER AMM 49-91-41. OPERATIONS AND LEAK CHECKED NORMAL.