A handle mechanism includes a handle and control mechanism. The handle is movable between a rest position flush with the door and a working position projecting therefrom. The control mechanism includes a first lever, a second lever, a tie-rod having ends linked to the first lever and the second lever according to hinged linkages at least one of which has a first oblong aperture parallel to the tie-rod, a device for elastically biasing the handle towards the rest position, a cam, a rod linking the cam to the tie-rod and including a pin. The tie-rod further includes a second oblong aperture parallel to the first oblong aperture and through which the pin of the rod extends in order to make the handle slide from the working position to the rest position in a motor-driven way through an over-travel of the cam when the elastic biasing device are not sufficient.