and THR HLD. In these two modes, the throttle will remain at the manual commanded position. History A primitive autothrottle was first fitted to later versions of the Messerschmitt Me 262 jet fighter late in World War II. However, the first commercial airplane with this system, which was named AutoPower, was DC-3 (since 1956). The first version was able to keep constant angle of attack but speed only during approach. When the possibility of maintaining of speed during entire flight was introduced, the modern autothrottle was created. Shortly after AutoPower's success companies Sperry (now part of Honeywell) and Collins have started competing in autothrottle's development, equipping with it more and more liners and business jets. Today it is often linked to a Flight Management System, and FADEC is an extension of the concept to control many other parameters besides fuel flow. See also Thrust lever Asiana Airlines Flight 214 - crashed when the pilot changed the auto pilot setting that disengaged the auto-throttle Atlas Air Flight 3591 – 2019 crash of a Boeing 767 freighter in which the pilot unknowingly switched the A/T to go-around mode in instrument meteorological conditions and suffered a head-up somatogravic illusion TAROM Flight 371 - crashed after an auto-throttle failure and incapacitation of the captain Sriwijaya Air Flight 182 - crashed after an auto-throttle failure References External links Aircraft controls Aircraft propulsion components