As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FUMES IN FLIGHT DECK AND CABIN. SEEMED TO DISSIPATE WITH PACK 1 OFF. ODORS WERE PRESENT WITH BOTH ENG BLEEDS AND APU BLEEDS ON. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU. ** SUPPLEMENTAL REPORT WILL BE SUBMITTED** (OPEN)