 The statically-balanced ailerons are divided into three sections, the central ailerons using lattice-form spars while the outer ailerons have spars composed of round tubing; externally, the ailerons had fabric coverings.The wing is braced on either side by four inclined Vee-struts; these bracing struts are faired by shaped duralumin sheeting, internally held by compact flat plates and U-sections.In its civilian service configuration, the Laté 521 would transport a maximum of 72 passengers in luxurious conditions.