37 Repair and maintenance of aerospace vehicles and component parts thereof; construction and installation of industrial buildings and test benches for aerospace vehicle parts, equipment and systems; repair of electric and electronic apparatus, instruments, systems, hardware and equipment for use in the aerospace field; repair, overhaul, servicing and maintenance of aerospace vehicle systems, equipment and parts and component parts thereof, including motors, engines, turbines, engine nacelles, reactors, thrusters, thrust reversers, braking systems, landing systems, wiring systems; under-wing repair, overhaul, servicing and maintenance services for all kinds of aerospace vehicle systems, equipment and parts; standardization in the nature of maintenance, corrective maintenance and standard replacement of aerospace vehicle systems, equipment and parts; on-line round-the-clock assistance provided seven days a week in the nature of providing online information to assist customers in the repair, overhaul, restoration, servicing, maintenance and standard replacement of aerospace vehicle systems, equipment and parts; technical advice relating to maintenance, repair, servicing of aircraft and component parts thereof, namely, motors and engines, turbines, engine nacelles, jet engines, thrusters, thrust reversers, aeronautical vehicles, braking systems, landing systems, and wiring systems; repair of ancillary equipment and tools for aerospace vehicle systems, equipment and parts