What was found
DURING CLIMBOUT COCKPIT FILLED WITH WHITE SMOKE (SMELLED AND TASTED ELECTRIC). DISCONNECTED GALLEY ELECTRIC, NO CHANGE. DUMPED CABIN, SMOKE DISSIPATED TEMPORARILY THEN RETURNED. FOUND LT ENG OVERSERVICED WITH ENGINE OIL. DRAINED ENGINE OIL TO PROPER LEVEL IAW MM 12-17-00. RAN APU AND BOTH ENGINES SEVERAL HOURS TO BURN OUT THE OIL RESIDUE FROM THE BLEED AIR DUCTS. AFTER ENG RUNS THE ECS SYS NO LONGER SMOKES AND THE ODOR IS AT AN ACCEPTABLE LEVEL.