What was found
AFTER STARTING BOTH ENGINES, BOTH PROPS OUT OF FEATHER, ALL SYS ON LINE, GROUND AGENT URGENTLY ADVISED EXCESS SMOKE COMING FROM NR 2 ENGINE COWLING, TOP AND SIDE. BOTH ENGINES IMMEDIATELY SHUTDOWN. CREW VERIFIED SMOKE AFTER SHUTDOWN BUT DIMINISHING. NO FIRE LIGHTS IN COCKPIT, OR OTHER ABNORMAL INDICATIONS. INSPECTED NR 2 ENGINE AND FOUND NO ENGINE FLUID LEAKS AT THIS TIME. FOUND EXCESSIVE DEICE FLUID IN AREA OF ECS PRECOOLER ASSY. CLEANED ENGINE AND C/W SEVERAL GROUND RUNS UNTIL VAPOR DISSIPATED NO DEFECTS NOTED AT THIS TIME. NO VAPORS NOTED IN BLEED SYS OR INTERIOR OF ACFT. RETURNED TO SERVICE. NO PARTS REPLACED.