What was found
THE CREW REPORTED WHEN ENGINE ANTI-ICE WAS TURNED ON, SMOKE FILLED COCKPIT. CREW RAN COM PROCEDURE. SMOKE DISSIPATED WHEN ENGINE ANTI-ICE TURNED OFF. CREW ADVISED OPS & MTX CONTROL, & CONTINUED ON TO ORIG DESTINATION. AIRCRAFT LANDED WITHOUT INCIDENT. MX IN KOAK FOUND RECIRCULATION FAN WITH SIGNS OF INTERNAL WEAR. MX R & R RECIRCULATION FAN IAW AMM 21-20-12. MX PERFORMED BORESCOPE INSPECTION OF #1 & #2 ENGINES. NO ENGINE OIL LEAKS WERE FOUND. MX INSPECTED LT & RT ACMS & ASSOCIATED DUCTS & FOUND OIL IN LT DUCTS. THE LT ACM R & R IAW AMM 21-51-01 & DUCTS CLEANED. OPS & LEAK CHECKED GOOD. BOTH LT & RT WATER SEPARATOR COALESCER BAGS R & R IAW AMM 21-20-02.