As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON SHORT FINAL, HAD BRIEF EXHAUST LEAK, SMOKEY ODOR FROM COCKPIT OVERHEAD VENT. RAN APU AND TURNED ON BLEED AIR. THERE IS A NOTICEABLE OILY ODOR IN COCKPIT AND CABIN. STARTED ENGINES AND TURNED OFF APU. ODOR WENT AWAY. BOROSCOPED AREA AND FOUND OIL LEAKING FROM CARBON SEAL. R & R APU IAW MM 49-10-00. OPS AND LEAK CHECKED GOOD.