What was found
AT CRUISE FL340 AFTER A FLUSH WAS INITIATED THE FLUSH MOTOR RAN CONTINOUSLY FAINT ELECTRICAL BURNING ODOR DETECTED IN COCKPIT AND FWD GALLEY MOTOR WAS MAKING A GRINDING NOISE EVENTUALLY QUIT BY ITSELF AFTER APPROX 45 SEC. THIS WAS FOLLOWED BY A VENT EXTRACT FAULT ECAM CAUTION VENT EXTRACT PLACED IN OVRD. REMAINDER OF FLIGHT UNEVENTFUL FWD LAV WAS CLOSED OFF TO PREVENT FURTHER USE AIR QUALITY FORM COMPLETED ( EXTRACT FAN VENT AVNCS SYS FAULT NOT DISPLAYED )--