What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS AT CRUISE FL310 HEARD FELT VIBRATION BEHIND F/O CB PANEL SOUNDED LIKE OVEN FAN SMELLED FUMES BUT F/A WAS USING OVEN FA HEARD FELT VIBRATION AND SMELLED FUMES CREW DID NOT SEE ANY SMOKE FA TURNED OFF OVEN COOLER VIBRATIONS AND FUMES STILL PRESENT C/W QUICK ACTION PROCEDURES QRH DIVERTED TO KABQ AFTER PROCEDURES FUMES DISSIPATED VIBRATION STOPPED PASSING 10000 FT. MAINTENANCE REMOVED AND REPLACED EXTRACT FAN AND AIR FILTER IAW AMM 21-26-51/21-26-43, PERFORMED OPS CHECK OF EXTRACT FAN . OPS CHECK GOOD.