As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. BURNING OIL SMELL IN CABIN & COCKPIT WHEN PACKS ARE ON APU AIR ACCOMPANIED BY HAZE IN CABIN. FOUND APU INGESTING OIL. MAINTENANCE FOUND MAIN GENERATOR SEAL LEAKING AND REPLACED AUXILIARY POWER UNIT PER MCM CARD 49-96-01.