As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: APU LOW OIL PRESSURE LIGHT CAME ON PASSING THROUGH 34,000 FT ON CLIMB OUT THEN APU IMMEDIATELY DROPPED ELECTRICAL LOAD; AIRCRAFT DIVERTED TO CVG AND LANDED SAFELY. REMOVE AND REPLACED APU OIL PRESSURE SWITCH. PER AMM 49-94-22.