What was found
SEVEN HOURS INTO FLIGHT THE AREA ABOVE THE G5 GALLEY IN THE OVERHEAD BEGAN MAKING A SUCKING AND WHINNING SOUND, THE SOUND WAS VERY LOUD AND THEN STOPPED SUDDENLY. WAS FOLLOWED BY A VERY STRONG. ELECTRICAL ODOR NOTICEABLE BY THE FLIGHT ATTENTANTS AND PASSENGERS. THE AIRCRAFT WAS GOUNDED. FOUND UPPER LEFT RECIRCULATION FAN ABOVE G5 GALLEY WITH WORN BEARINGS. REMOVED AND REPLACED UPPER LEFT RECIRCULATION FAN IAW AMM 21-25-01. NO LOUD NOISE OR ELECTRICAL ODOR NOTED AFTER INSTALLATION.