7
Propulsion systems for aeronautical vehicles, and components and spare parts and accessories therefor, including engines, turbines, pumps, thrusters, jet engines, nacelles, reverse thrusters, engine air intakes, fan cowls, exhaust cones
37
Repair, maintenance, servicing and reconditioning of propulsion systems for aeronautical vehicles, engines, thrusters, nacelles, reverse thrusters and components therefor; Underwing repair, servicing, upkeep and maintenance of propulsion systems of all kinds for aeronautical vehicles, and components therefor; Upgrading, reconditioning and standard changing of propulsion systems for aeronautical vehicles, engines, thrusters, nacelles, reverse thrusters and components therefor; Consultancy and assistance in connection with the repair, servicing, upkeep, upgrading and maintenance of propulsion systems for aeronautical vehicles, engines, thrusters, nacelles, reverse thrusters and components therefor
42
Research and development (engineering) in the field of aeronautics and space; Analysis of technical data in the field of aeronautics and space; Technical consultancy in the aeronautical field (provided by engineers); Testing of machines and materials in the field of aeronautics and space; Analysis, expertise and processing of the acquisition of data recorded during the operation of engines, systems, equipment and parts of aircraft (engineering)