As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) OIL SMELL IN CABIN ON APPROACH. DURING DISCUSSION WITH CUSTOMER, IT WAS FOUND OUT THAT MOP HAS A TENDENCY TO INCREASE. CUSTOMER REPORTED TO HAVE ADJUST MOP, TO DECREASE IT, 2 TIMES SINCE OH. MOT WAS ALSO FOUND TO FLUCTUATE & INCREASE WITH THE EVENT OF MOP. THE ENGINE IS BEING REMOVED.