As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED AN EXHAUST ODOR WHILE ENGINES ON AND BLEEDS SELECTED. MAINTENANCE INSPECTED THE ACFT AND DETERMINED THE APU TO BE CAUSING THE ODOR. MAINTENANCE R & R APU, OPS TESTED WITH NO DEFECTS AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.