As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS GROUNDED. COCKPIT HAS VERY STRONG OIL-PACK ODOR. LASTED ENTIRE FLIGHT. CABIN REPORTS THE ODOR NOT AS STRONG, BUT WAS VERY NOTICEABLE ON TAKE OFF AND CLIMB. FOUND SOURCE OF ODOR TO BE APU. APU DUCTS NEED BURNOUT AFTER REPLACEMENT OF APU. REPLACED APU PER JOB CARD 26L31049005. ACCOMPLISHED APU DUCT BURNOUT.