What was found
PREVIOUS CREW NOTED SLIGHT SULFER SMELL AND MX WANTED IT NOTED IF IT REOCCURED. SHORTLY BEFORE TAKEOFF WE EXPERIENCED A SULFER SMELL IN AFT GALLEY THAT DISSAPATED AFTER TAKEOFF. NO SMELL NOTED DURING FLIGHT. SULFER SMELL CAME BACK VERY FAINT ON TOUCHDOWN BUT DISSAPATED SHORTLY THEREAFTER. PER VERBAL FROM CREW, ODOR WOULD APPEAR DURING APU OPERATION. PERFORMED FIM 0551. TASK 814 - COULD NOT DUPLICATE. RELEASE PER MEL 49-1B APU INOP C/N 13090294 SEAMC ANDY NOTIFIED. GROUNDED - YES. ON DEFERRAL.