As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT HAS BAD CABIN ODOR WITH BOTH PACKS ON AND APU BLEED SELECTED ON. AIRCRAFT GROUNDED. MAINTENANCE INITIALLY FOUND THE APU OIL SYSTEM WAS OVERSERVICED AND SERVICED THE OIL SYSTEM TO THE PROPER LEVEL. MAINTENANCE FOUND OIL LEAKS ON THE APU AT THE OIL COOLING FAN, GENERATOR AND STARTER COVER AND REPLACED SEALS AS REQUIRED. A SATISFACTORY LEAK AND OPERATIONAL CHECK WAS ACCOMPLISHED.