This includes civil regulations (RTCA/DO-254, DO-178C, and/or ARP4754A, Advisory Circulars, Issue Papers, CRIs, CFR, CS, CAR, CAAC, etc.) involving Intellectual Property, commercial integrated devices, commercial subassemblies, and circuit board assemblies. GE Aerospace's Systems business comprises a wide cross-section of aviation products, including power generation, power distribution, navigation, cockpit displays, computing and networking, ignition systems, sensors, and propellers.