As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN HAS BAD ODOR WITH BOTH PACKS ON WITH APU BLEED SELECTED ON. AIRCRAFT WAS GROUNDED. MAINTENANCE FOUND OIL CONTAMINATION IN APU COMPARTMENT DUE TO THE APU GENERATOR SEALS LEAKING AND REPLACED THE APU GENERATOR PER AMM 24-23-51-0401.