As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON BOTH ENGINE STARTS, CABIN FILLED WITH SMOKE. STARTED ENGINES I.A.W. MM 71-00-30 WITH BLEEDS ON SMALL AMOUNT OF SMOKE IN CABIN, CONTINUED ENGINE OPERATION UNTIL THE SMELL CLEARED. SUSPECT DEICING FLUID HAD ENTERED THE ENGINES. AIRCRAFT WAS RETURNED TO SERVICE.