As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON LANDING SMOKE FILLED CABIN AND COCKPIT. DURING SUBSEQUENT INSPECTION FOUND THAT ENGINE DRIVEN COMPRESSOR (CABIN) HAD OVERHEATED AND DUMPED OIL INTO CABIN AIR INLET DUCT. THE CAUSE FOR THE OVERHEAT CONDITION WAS A FAILED OIL CHECK VALVE.