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
3981101 Propeller control systems, aircraft
3981104 Calibrators, aileron balancing, aircraft
3981107 Strain and torque indicators, aircraft
3981111 Pressure gauges and components, aircraft
3981112 Sensors, critical airflow
3981115 Cable tension regulators, aircraft
3981118 Temperature indicators, external air, aircraft
3981119 Ice warning indicators, aircraft
3981124 Pneumatic controls and actuators, compressed air equipment, aircraft
3981125 Hydraulic controls and actuators, hydraulic equipment, aircraft
3981127 Servo-controls, aircraft
3981129 Controls, mechanical and cable, aircraft
3981134 Landing equipment instrumentation, aircraft
3981135 Landing systems, automatic, aircraft
3981138 Oxygen control equipment, aircraft
3981140 Pressure control instruments, aircraft cabin
3981143 Recorders, engine life, aircraft
3981144 Fatigue load measuring equipment, aircraft
3981147 Watches and chronographs, aircraft
3981148 Battery packs, emergency, aircraft
3981150 Fault indicators, aircraft systems
3981151 Inertial guidance systems
3981152 Radio control systems for remote controlled aircraft/drones
3981153 Flight data recorders (black boxes), aircraft
3981154 Computers, data, and flight data systems, aircraft
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