As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5890 APU SHUT DOWN DURING FLIGHT DUE TO HIGH TEMP, NR 2 IDG HAD BEEN DEFERRED. FLIGHT WAS DIVERTED TO SDF. INSPECTED APU ECU FOR FAULT CODES, NO CODES DISPLAYED. PERFORMED AN OPERATIONAL TEST OF APU, OPERATION OF APU SATISFACTORY.