EMER DECLARED AS SMOKE FROM GLYCOL ENTERS COCKPIT AND CABIN.

Narrative

ACFT WAS DEICED AT CMH FOR FROST ON WINGS AND FUSELAGE AFTER AN OVERNIGHT LAYOVER FOR AN EARLY MORNING DEP. ON TKOF AND INITIAL CLB; THERE WAS A SLIGHT SMELL OF GLYCOL IN COCKPIT AND CABIN. SMELL DISAPPEARED AT MID CLB AND CRUISE. AT 35000 FT PWR WAS REDUCED TO IDLE FOR DSCNT INTO STL. AGAIN A SLIGHT SMELL OF GLYCOL WITH A PUFF OF SMOKE AROUND FE'S PANEL. DURING DSCNT; SMELL AGAIN DISAPPEARED; ALL COCKPIT INDICATIONS WERE NORMAL. AT XA34 LCL TIME; JUST PAST PETTI INTXN AT 11000 FT; 250 KTS; CLRNC TO 4000 FT WAS RECEIVED. PWR REDUCED TO IDLE FOR DSCNT. AT THIS TIME; GLYCOL SMELL RETURNED AND COCKPIT AND CABIN BEGAN TO FILL WITH SMOKE. I DECLARED AN EMER TO STL APCH; CLOSED DOWN L AIR CONDITIONING PACK; AND APPLIED PWR TO ALL ENGS WHILE ON DSCNT. WE PROCEEDED DIRECT TO STL ARPT AT 290 KTS BELOW 10000 FT AND LANDED 7 MINS LATER. HALFWAY TO ARPT SMOKE AND SMELL BEGAN TO ABATE. LNDG AND TAXI IN WAS SMOKE AND SMELL FREE. I BELIEVE ACFT WAS IMPROPERLY DEICED ON GND AT CMH IN THAT GLYCOL WAS SPRAYED INTO EVERY OPENING. GLYCOL MUST HAVE BEEN POCKETED IN AIR CONDITIONING UNITS SO THAT WHEN DECK ANGLE LOWERED; AND 13TH STAGE AIR CAME ON AT IDLE; AND AIR CYCLE MACHINE BEGAN TO OPERATE; ACFT BEGAN TO FILL WITH SMOKE. IT TAKES ONLY A SMALL AMOUNT OF GLYCOL TO PRODUCE SMOKE.