As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUME EVENT DURING APPROACH. ODOR CLEARED WITH PACKS OFF AND RAM AIR OPEN. DURING PREP FOR ECS DECONTAMINATION, FOUND THE APU LOP SWITCH LEAKING AND OIL COATING THE INTAKE PLENUM. CLEANED OIL CONTAMINATION, AND R & R LOW OIL PRESSURE SWITCH IAW AMM 49-94-14. LEAK CHECKED GOOD.