42 Technological consultancy in the field of aeroplane engines and gas turbines, and parts therefor and with regard to the design, development, manufacture, repair, maintenance, inspection, assembly, disassembly, restoration, servicing, overhaul and testing of aeroplane engines and gas turbines, and parts therefor; scientific and industrial research in the field of aeroplane engines and gas turbines, and parts therefor, and with regard to the design, development, manufacture, repair, maintenance, inspection, assembly, disassembly, restoration, servicing, overhaul and testing of aeroplane engines and gas turbines, and parts therefor; monitoring, diagnosis and prognosis for aeroplane engines, namely, jet engines, propeller turbojet engines, gas turbines and parts therefor; [design, maintenance, development and updating of computer software programs for data and information processing; ]research and development in the field of principles and properties of physical materials and in the field of construction principles; engineering services in the aforesaid fields; engineering project management services relating to engineering projects; development of technical computation and analysis procedures relating to engineering projects; engineering services, namely, conducting and development of structural damage analyses; design, development and testing of aeroplane engines, namely, jet engines, propeller turbo-jet engines, gas turbines, namely, shaft output driving gear and parts therefor, namely, turbo compressors, exhaust gas turbochargers, mechanically driven compressors, transmission components, liquid and fuel pumps, pump driving gear, radial and axial blowers, fans, guide grids for turbo engines, gas flow controls, axial and radial turbines, sound absorbers, fuel pipes, fuel regulators, fuel gauge devices, fuel injection pumps, nozzles and valves, pneumatic starting motors, fixed and detachable machine couplings, hydraulic transmission components and machine couplings, oil and fuel filters, liquid filters, centrifuges, bearings for shafts, axles, rotors and transmission components, cogged wheels, igniters, ignition devices, profile and distributor pipes, machine housings, assembly devices for driving gear, control gear, gaskets, namely, brushes, labyrinth and axial face ends, sealing rings, compressor rotors, discs, stators, rotors, integral rotors and housings, namely, for turbo engines, blades, namely, guide blades and moving rotor blades for turbo engines, propelling nozzles for aeroplane engines, and components for the aforesaid goods; design, development, inspection and testing of aeroplane engines and gas turbines, and parts therefor