As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IDG 2 MESSAGE APPEARED IN FLIGHT. APU OIL TEMP MESSAGE APPEARED IN FLIGHT. A/C RETURNED TO RDU. REPAIRED WIRE AT IDG OIL TEMP BULB CANNON PLUG PIN B IAW CL-65 WIRING MANUAL 20-00-00. OPS CHECK GOOD AT THIS TIME. REMOVED AND REPLACED APU OIL COOLER ASSY LEAK CHECK AND OPERATIONAL CHECK GOOD IAW 49-91-07. A/C RETURNED TO SERVICE. NO FURTHER PROBLEMS.