What was found
DURING CRUISE, RECEIVED SMOKE LAVATORY SMOKE ECAM WARNING. A PORTABLE FIRE EXTINGUISHER WAS USED BY FLIGHT ATTENDANT IN RIGHT AFT LAV UNDER SINK WASTE CONTAINER. INVESTIGATION OF WASTE CONTAINER CONTENTS REVEALED A CIGARETTE TO BE THE CAUSE. MAINTENANCE INSPECTED AREA FOR SMOKE OR FIRE DAMAGE WITH NONE FOUND. REPLACED FIRE EXTINGUISHER, OPERATIONAL CHECK OK.