As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3212 APU AUTO SHUTDOWN AT CRUISE DIVERTED TO CMH. AIR DIVERSION. CORRECTIVE ACTION: FOUND APU TO BE LOW 3 QTS FOUND B NUT ON OIL PUMP TUBE TO BE LOOSE TIGHTENED B NUT PER A320 AMM 49-91 PERFORMED LEAK CK . NO LEAKS NOTED OK FOR SVC. (8110164)