As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI IN AFTER OPERATIONAL CHECK FLIGHT, SMOKE AND ODOR NOTICED COMING THROUGH COCKPIT GASPERS. BY THE TIME AIRCRAFT WAS PARKED AND SHUTDOWN, SMOKE AND ODOR FILLED THE COCKPIT AND CABIN. ARFF CALLED TO THE SCENE. NO NOTICEABLE FIRE OR FLAMES. TROUBLESHOT, FOUND CABIN ACM SEIZED. REPLACED CABIN ACM (AIR CYCLE MACHINE) WITH OVERHAULED UNIT IN ACCORDANCE WITH CESSNA 750 MAINTENANCE MANUAL CHAPTER 21-51-00. OPERATIONAL CHECK GOOD.