Operated flap for an axisymmetrical exhaust nozzle of a jet engine

The flap has a plate (22) in ceramic matrix composite material, and a metallic friction surface (24) placed under the width of the plate. The friction surface is in contact with a metallic jet nozzle joint and is limited by two lateral flanks (25). The flanks are perpendicular to the friction surface and are placed opposite and near lateral flanks of an adjacent flap.