What was found
(CAN) EXCESSIVE SMOKE FROM THE LT ENGINE WAS REPORTED BY PASSENGER AND GROUND CONTROL DURING APPROACH TO AIRPORT. FLIGHT CREW DECLARED AN EMERGENCY AND AIRCRAFT LANDED AND PASSENGERS IMMEDIATELY DISEMBARKED. AIRPORT EMERGENCY RESPONSE VEHICLES ATTENDED. NO VISIBLE FLAMES OR FIRE WAS EVIDENT PRIOR TO OR AFTER LANDING. AIRCRAFT WAS TOWED FROM THE RUNWAY TO MAINTENANCE FACILITY. MAINTENANCE INVESTIGATION REVEALED EXCESSIVE OIL IN THE TURBOCHARGER EXHAUST. TURBOCHARGER REPLACED WITH O`HAULED UNIT AND AIRCRAFT/ENGINE OPERATION CHECKED NORMAL. (TC NR 20070119012)