What was found
SMOKE AFT LAV WARNING AFTER TAKEOFF FLIGHT 3966 CLOSED / CREW REPORTED THAT THE AIRCRAFT WAS DE-ICED BEFORE DEPARTURE WITH AN ESTIMATED 15 US GALLONS OF DEICING/ ANTI-ICING FLUID (GLYCOL). INSPECTED R/H & L/H 10TH STAGE BLEED AIR DUCT AT R/H & L/H ACM INLET WITH BORESCOPE, FOUND NO SIGNS OF FOREIGN DEBRIS OR OIL RESIDUE INSIDE DUCTING. PERFORMED OPS CHECK OF R/H & L/H PACK INDEPENDENTLY WITH APU BLEED AIR WITH NO SIGNS OF SMOKE OR ODOR BEING DETECTED; OPS CHECK PERFORMED IN REFERENCE WITH AMM 21-51-00. PERFORMED OPS CHECK OF R/H & L/H PACK INDEPENDENTLY WITH L/H ENGINE BLEED AIR WITH NO VISIBLE SIGNS OF SMOKE OR ABNORMAL ODOR IAW AMM. HOWEVER PERFORMED OPS CHECK OF R/H & L/H PACK INDIVIDUALLY WITH R/H ENGINE BLEED AIR IAW AMM. DURING OPERATION OF THE R/H PACK THIS PRODUCED A SLIGHT ODOR (ODOR HAD A SLIGHTLY SWEET SMELL TO IT) FOR ABOUT 10 SECONDS AND QUICKLY DISSIPATED, CONTINUED TO OPERATE WITHOUT THIS OCCURRING AGAIN. FOLLOWED TROUBLE SHOOTING GUIDELINES PROVIDE IN BOMBARDIER SERVICE LETTER & PROCEDURES LISTED IN FIM. PERFORMED FUNCTIONAL TEST OF AFT LAV SMOKE DE