What was found
DURING LANDING ROLL OUT, THE FLIGHT CREW REPORTED WHITE/GRAY SMOKE AND ACRID ODOR IN THE COCKPIT AND PASSENGER CABIN. MAINTENANCE PERFORMED IDLE LEAK CHECK OF BOTH ENGINES IN ACCORDANCE WITH THE REQUIREMENTS OF AMM 71-00-00-710-006 AND PERFORMED A CHECK OF THE PACK SYSTEM OPERATION IAW AMM 21-26-00-710-001-01. A FOD INSPECTION WAS CONDUCTED OF BOTH ENGINES IAW MP 72400-01. ALL SYSTEMS CHECK NORMAL AND THE ACFT RETURNED TO SERVICE. ENGINEERING NOTED THIS SITUATION HAS OCCURRED IN THE PAST AND HAS BEEN LINKED TO DE-ICING FLUID ON THE RUNWAY BEING INGESTED INTO THE AIR HANDLING SYSTEM ON LANDING.