The article deals with the adjustment of the wing selected part of the plane Viper SD-4 from slovak producer with using environment of software Siemens NX9. The adjustment is carried out after consultation with the test pilots of this plane and tries to take into account the observations made during the test flights. The first part of the article is focused on the current construction of the wings and its parts. The second part describes how digitalize the real wing by using reverse engineering. The last section describes adjustment of the design and its 3D model in a virtual environment. The model is created in the environment Modeling and Aero Sheet Metal in software Siemens NX. When modelling was also used part of the drawing documentation from the manufacturer. This article deals with the wing treatment on the theoretical base.