What was found
VIBRATION FELT & HEARD BELOW GALLEY 1 FLOOR DURING CRUISE ODOR ACCOMPANIED VIBRATION THEN DISSAPATED. VIBRATION LAST 2 MINUTES. ACCOMPLISHED TSM 05-50-00 AND FOUND BLOWER GRINDING AND CONFRIMED BY PHYICAL EXAMINATION. SWAPPED BLOWER AND EXTRACT FANS AND PLACED EXTRACT FAN ON MEL 21-26-03 CONDITION C, CAT C. ACCOMPLISHED THE MAINTENANCE OPS CHECK OF THE AEVC SYS VIA MCDU IAW AMM 21-26-02, CONDITION C. DISCONNECT EXTRACT FAN CONNECTION PLUG AS GMM PROCEDURES. R & R AVIONICS VENT EXTRACT FAN (18 HQ) IAW AMM 21-26-51 AND OPS OK. CONNECTED CONNECTION PLUG IN AIR INLET (21 HQ) AND RESET CB COLLAR, REMOVED ALL BACK IN NORMAL CONFIGURATION.