As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) APU LEAKING OIL INTO AIR DUCTING. STRONG OIL SMELL IN COCKPIT. INVESTIGATION FOUND THE APU LOAD COMPRESSOR SEAL FAILED AND LEAKING. SEE ATTACHMENT FOR INVESTIGATION DETAILS. (OTHER CAUSE: LOAD COMP SEAL LEAKAGE ) (CASA NR 510001627)