9 Scientific, optical, weighing measuring and checking apparatus and instruments, namely, apparatus for checking flight parameters, weighing machines, and instruments for measuring length; electronic cards for processing parameters; electronic systems and equipment, whether on board or not, comprised of software for acquiring and processing data performance of propulsion systems, namely, solid rocket motor, cryogenic engines, nozzle, helicopters engines, transmission chain, auxiliary power unit, nozzle, nacelle, engine, transmission, drive shafts, brakes, hybrid powertrain, wind turbines, steam and gas turbines in-flight testing equipment, and data processors; monitoring systems comprised of computer hardware and software for evaluation of security and performance and maintenance and servicing requirements for aircraft engines and/or their modules and parts; electrical and electronic devices and equipment for maintenance and monitoring used on board aircraft or engines, fixed on test benches or portable for ground interventions for reading and interpreting data from computers and sensors, namely, in-flight testing equipment, electronic data recorders, calculating machines and data processing equipment and computer navigation recording systems; apparatus for recording transmission, reproduction of sound, images and data; software, particularly computer programs and software providing information on aircraft engines, operation, maintenance, servicing and repair in relation to aircraft engines and their modules and parts; wiring, electric; electric distribution systems, namely, power distribution panels; electric and electronic devices for vehicle equipment, namely, sensors, data conditioners, connectors, computers, computer software for reading and interpreting data from calculators and sensors fitted on aircraft or engines; quality control and testing devices, namely, performance testing machines, in-flight testing equipment, and testing equipment for measuring the temperature, pressure, position or form of workpieces in a machine tool