Avionic sensor systems, namely, navigation systems, aircraft airspeed sensors, and aircraft altitude indicators; navigation and communication systems in the field of avionics, namely, GPS receivers, communication transceivers, transponders, audio panels comprising hardware and software for controlling transmission and reception of radio signals, weather radar, terrain awareness and warning systems (TAWs) comprising hardware and software for determining when a terrain hazard exists and for outputting corresponding alerts to an aircraft pilot or crew, automatic flight control systems (AFCs) comprising hardware and software for automatically controlling flight of an aircraft, attitude heading and reference systems (AHRs) comprising hardware and software for providing aircraft attitude and heading information for use by a pilot, flight crew or other avionics, primary flight displays (PFDs) comprising hardware and software for displaying navigation and flight information and for controlling avionics instruments, and multi-function flight displays (MFDs) comprising hardware and software for displaying navigation and flight information and for controlling avionics instruments; aircraft flight planning software; electromechanical controls for use in avionics; electronic communications systems comprised of computer hardware and software for the transmission of data between two points; on-board avionic devices and equipment, namely, a suite of computer software applications for integrating the operation of flight control systems, flight management system, electronic calculators, modular computers, autopilots, navigation computers and instruments, namely, electronic logs, wind instruments for measuring and indicating force, speed, and direction, compasses, global positioning systems (GPS) instruments, autopilots for automatic navigation, electronic chart plotters, navigational computers, navigational monitors, automatic flight control system, comprising of stick force sensors, control wheels, transducers, amplifiers, remote actuators, remote terminal computers and computer programs for use therewith, radars and muzzle velocity meters, altitude controls, throttle controls and pitch controls, central panel displays, radio transceivers, displays, all for controlling flight parameters; sensors and automatic testers for command and flight control, namely, altitude controls and pitch controls and visual radio approach systems, monitoring display; aviation engine monitoring instrumentation; aviation fuel tracking instrumentation