What was found
(CAN) THE FLIGHT CREW REPORTED SMOKE & A SULFURIC ODOR IN FLIGHT. THE SMOKE & ODOR DISSIPATED QUICKLY AFTER RUNNING THE QR. THE FLIGHT CONTINUED UNEVENTFULLY. UPON ARRIVAL MX FOUND THE RECIRCULATION FAN HAD FAILED. THEY WERE ABLE TO CONFIRM A BURNT SMELL COMING FROM THE FAN AT REMOVAL & ALSO FOUND THE RECIRCULATION FAN CB POPPED. THE CREW REQUESTED REPLACEMENT OF THE FAN INSTEAD OF DEFERRAL BY MEL DUE TO THE INFLIGHT SMOKE EVENT.