What was found
STL - AFTER TAKEOFF, HAD SMOKE ENTERING CABIN. TURNED OFF LEFT AIR CONDITIONING PACK AND SMOKE SUBSIDED. FOUND OIL CONTAMINATION ON WATER SEPARATOR, MFG P/N 179460-8-1. REPLACED WATER SEPARATOR, PERFORMED AIR CONDITIONING DUCT CLEANOUT. AIR CONDITIONING SYSTEM OPERATION THEN CHECKED NORMAL. (M)