Accuracy diagnostics bevel gears of aircraft gearbox has become a key component in today’s manufacturing process. Properly prepared and carri ed out the measurement process of bevel gears determines its accuracy, productivity and the production costs of aeronautical gearbox. In the process of assessing the accuracy of manufacturing, majority of manufacturers of bevel gears use specialized contact coordinate measuring machines. Therefore, this article depicts different perspective on measurements of bevel gears using a universal measuring device, which is an optical 3D scanners ATOS, using in the process of measuring white and blue light. Due to the use of the optical scanners ATOS in measurement process, it was necessary to develop a methodology deali ng with the process of assessing and accuracy, in order to achieve the desired results of measurement. The studies take into account the economic aspects of the use of technical diagnostics in the production process. The article presents an analysis of conditions and developed rules concerning the preparation of a model for measurement. It also contains hints and a description of the measurement process. Furthermore, it depicts the rules specifying the interpretation of measurement results as well as the technical rules of their realization.