What was found
CREW REPORTED SMOKE AND FUMES IN CABIN FOLLOWED BY A LEFT RECIRC FAN EICAS MESSAGE. FAN TURNED OFF AND SMOKE-FUMES BEGAN TO DISSIPATE. FLIGHT ATTENDANT REPORTED SMOKE FUMES MOST PRONOUNCED AT MID CABIN LEFT SIDE AREA. SUSPECT BAD LEFT RECIRC FAN. FAN MADE LOUD NOISE AND HAD ELECTRICAL SMELL. DISCONNECTED CP AND PULLED AND COLLARED CB. LEFT RECIRC FAN DF PER MEL.^01SEP OPB INF- :.THE CB IS C336(3PHASE) ON P36 PANEL, WHICH HAS BEEN PULLED AND CAPPED. REPLACED LEFT RECIRC FAN PER MM.