Maintenance of modern aircraft is a complex process. The use of AR smart glasses with 3D information visualization should make repair and maintenance work easier for aircraft mechanics. Virtual elements such as instructions, dis-plays and technical tools can be operated by way of gesture, voice and gaze control. With the help of augmented reality systems, researchers at the Fraun-hofer Institute for Communication, Information Processing and Ergonomics FKIE have developed concepts and solutions for maintaining the Airbus A400M.