Abstract: A twin flow turbo-jet engine which includes an inner structural cowling formed by two lateral shells and which is secured through the intermediary of a securing mechanism such as fluid actuators between a forward flange and a rear flange of the casing of the engine. At least one of the securing devices enables free thermal expansion of the casing. The upstream edge of the inner cowling may include an annular seat which is in sliding abutment on the outer surface of one cylindrical annular member carried by one flange of the engine casing. The downstream edge of the cowling is connected by an annular tooth-groove connection with a support ring of which the securing to the casing is provided by a system of radial pins and ball joints.

Abstract: One component, such as a rear cowling of a turbojet engine nacelle, is held o another component, such as a flange of the engine housing, by a plurality of lockbolts. The lockbolts are synchronously controlled to effect attachment or detachment of the cowling or other component. Each lockbolt includes a strap which may be fixed with respect to the stationary component such as the flange. Each lockbolt also includes a tie bar having a hook at one end for cooperation with the associated strap and a pivot shaft at the other end. The pivot shaft rides in a slide track which may be disposed in a second support attached to the removable component. There is a moving part which may be carried by the second, stationary support, the moving part including a cam which cooperates with the pivot shaft of the tie bar to impart translational movement to the tie bar. The cam has a dwell portion which enables the moving part to move beyond the position at which the hook of the tie bar is fully withdrawn.