What was found
ON TAXI OUT, MAIN DECK CARGO SMOKE WARNING RETURNED. TROUBLESHOT SYS REF TSM 26-19-00. UPON ARRIVAL AT ACFT. MAIN CARGO DECK AND FLIGHT DECK HAD A VERY STRONG ODOR OF DEICE FLUID. INSPECTED PACKS AND FOUND DEICE FLUID IN LT PACK. OPENED AND CLEANED COALESCER BAG AND CANNISTER. RAN LT PACK FOR APPROX 1 HR UNTIL ODOR DISSIPATED. WHILE PERFORMING MAIN CARGO SMOKE DET TEST REF 26-19-00-05, DET MID2 3A WOULD NOT TEST. REMOVED APU INLET DUCT IAW REQUEST TO CHECK FOR PRESENCE OF OIL. FOUND OIL PRESENT. 49-51-11-04 AND 49-16-14-04. R & R APU.