As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON LANDING SMOKE FILLED THE CABIN AND THE COCKPIT. MAINTENANCE RECEIVED 2 FAULT CODES: 142 & 144. INSPECTED APU FOUND EVIDENCE OF DE-ICING FLUID IN INLET, FLUSHED OUT WITH CLEAN COLD WATER. PERFORMED GROUNDS RUNS ON BOTH ENGINES AND APU. NO MORE SMOKE IN CABIN OR COCKPIT IAW AMM 20-40-10.