3981001 Flight management systems, aircraft 3981003 Automatic pilots, aircraft 3981005 Head-up display equipment, aircraft 3981006 Head-down display equipment, aircraft 3981008 Machmeters, aircraft 3981009 Air speed indicators (anemometers), aircraft 3981010 Air speed indicators (anemometers), combined with Machmeters, aircraft 3981011 Baroscopes, aircraft 3981013 Altimeters, barometers and barographs, aircraft 3981015 Accelerometers and accelerographs, aircraft 3981016 Tachometers, speedometers, aircraft 3981018 Variometers, rate of climb indicators, aircraft 3981020 Yaw meters, aircraft 3981022 Goniometers, aircraft 3981023 Range finding equipment, radio 3981025 Turn-and-slip/turn-and-bank indicators, aircraft 3981028 Drift indicators/meters, optical, aircraft 3981030 Gyroscopes, aircraft 3981033 Gyroscopic horizons/artificial horizons, aircraft 3981034 Ground position indicators, aircraft 3981035 Planispheres, air navigation 3981036 Glide path indicators 3981037 Gyro gimbals 3981038 Omnibearing indicators 3981040 Pressure ratio meters, engine, aircraft 3981041 Thrust meters, aircraft 3981042 Thrust indicators, jet engine, aircraft 3981043 Position indicators for aircraft equipment 3981044 Recorders, time-temperature, engine, aircraft 3981048 Fuel meters and gauges, aircraft 3981049 Fuel balancing and management systems, airborne, aircraft 3981051 Temperature indicators, jet engine, aircraft 3981052 Constant speed control units, aircraft 3981053 Throttle controls, aircraft
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