As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS FUMES IN CABIN, APU RUNNING AND PACKS PUTTING OUT COOL AIR. MAINTENANCE ACCOMPLISHED ODOR CARD 05-96-70 AND REPLACED APU DUE TO OIL LEAK IAW CARD 49-96-83. PERFORMED PACK BURN IAW CARD 21-92-12. NO ODORS NOTED.