As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5681, IAH TO ELP. WHILE AT CRUISE WITH THE NR2 IDG ON DEFERRAL, THE FLIGHT CREW RECEIVED AN APU OIL TEMP MESSAGE. THE QRH WAS FOLLOWED AND THE FLIGHT DIVERTED TO MAF. WHILE IN MAF MAINTENANCE FOUND THE APU OIL LEVEL WAS LOW AND SERVICED IT PROPERLY. THE HIGH OIL TEMP BULB WAS ALSO REMOVED, CLEANED AND REINSTALLED. (S)