What was found
AIRCRAFT WAS GROUNDED: CLIMBING OUT OF LOS ANGELES APPROXIMATELY 31,000 FEET FLIGHT ATTENDANTS AND SEVERAL PASSENGERS COMPLAINED OF A SMELL CLOSELY RESEMBLING A BURNT MATCH SMELL. BOTH RECIRC FANS WERE BOTH IMMEDIATELY TURNED OFF. THE SMELL SEEMED TO DISSIPATE QUICKLY. NO FURTHER UNUSUAL SMELLS WERE NOTICED FOR THE REMAINDER OF THE FLIGHT. MAINTENANCE FOUND RH RECIRCULATION FAN BEARINGS DEFECTIVE. REPLACED WITH SERVICEABLE FAN . IAW AMM 21-25-02-400-801.