As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED AN APU OIL TEMPERATURE MESSAGE IN FLIGHT EN ROUTE FROM CLT TO ORF. AIRCRAFT DIVERTED TO RDU AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT AND INSPECTED THE AIRCRAFT, CLEANED THE APU OIL COOLER AND PERFORMED CHECKS USING THE AIRCRAFT MAINTENANCE MANUAL. AIRCRAFT WAS RELEASED FOR SERVICE.