North American Sabreliner, tailored to the USAF UTX requirement, first flew on 16 September 1958. Powered by two Pratt & Whitney JT12 turbojet engines then Garrett TFE731s, more than 800 were produced from 1959 to 1982. Designed in 1957 for the UCX requirement, the McDonnell 119 was delayed by the cancellation of the Fairchild J83 engine program, and first flew on 11 February 1959 powered by four Westinghouse J34 turbojets. The 119 was certified for a MTOW with four Pratt & Whitney JT12 or General Electric CF700 engines, but no firm orders were received, and only the single prototype was completed. 1960s first flight The MTOW British Aerospace 125 first flew on 13 August 1962 as the de Havilland DH.125, powered by two Armstrong Siddeley Viper turbojets. Its engines were replaced by Garrett TFE731s, then Pratt & Whitney Canada PW300 turbofans. Almost 1,700 aircraft of all variants, including the Hawker 800, were produced between 1962 and 2013. The Aero Commander 1121 Jet Commander, which later became the IAI Westwind, first flew on 27 January 1963, powered by two General Electric CJ610 turbojets, then Garrett TFE731s. Production of Jet Commanders and Westwinds from 1965 to 1987 came to 442 aircraft; and it was developed as the IAI Astra, later re-branded as the Gulfstream G100. The MTOW Dassault Falcon 20 first flew on 4 May 1963, powered by two General Electric CF700s, then Garrett ATF3 turbofans and Garrett TFE731s. A total of 508 were built from 1963 to 1988, and it is the basis of the Dassault Falcon family. The first light jet first flew on 7 October 1963 : the Learjet 23. Powered by two General Electric CJ610s, its MTOW complies with FAR Part 23 regulations. The first member of the Learjet family, 104 were built between 1962 and 1966. The forward wing sweep, MTOW Hamburger Flugzeugbau HFB 320 Hansa Jet first flew on 21 April 1964, powered by two General Electric CJ610s; 47 were built between 1965 and 1973. The joint Piaggo-Douglas, MTOW Piaggio PD.808 first flew on 29 August 1964, powered by two Armstrong Siddeley Vipers, 24 were built for the Italian Air Force. On 2 October 1966 the first large business jet first flew, the MTOW Grumman Gulfstream II, powered by two Rolls-Royce Spey turbofans. From 1967 to the late 70s, 258 were built and it led to the ongoing Gulfstream Aerospace long range family. The MTOW Cessna