As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, CABIN FILLED WITH WHITE/GRAYISH SMOKE DURING LANDING. UPON INSPECTION, FOUND CABIN PACK OIL SIGHT GLASS BLACK. REPLACED FWD (CABIN) ACM WITH EXCHANGE UNIT, ALL WORK DONE IAW CHAPTER 21-51-00 OF THE M/M. LEAK AND OPERATIONAL CHECKS NORMAL.