Boeing 707 center section tanks. Its first flight was on January 11, 1958; 69 turbojet 707-320s were delivered through January 1963, the first passengers being carried (by Pan Am) in August 1959. The 707-420 was identical to the −320, but fitted with Rolls-Royce Conway 508 (RCo.12) turbofans (or by-pass turbojets as Rolls-Royce called them) of 18,000 lb (79 kN) thrust each. The first announced customer was Lufthansa. BOAC's controversial order was announced six months later, but the British carrier got the first service-ready aircraft off the production line. The British Air Registration Board refused to give the aircraft a certificate of airworthiness,
Air Zimbabwe 1967, Air Rhodesia inherited CAAC operations, as well as a fleet of Boeing, DC-3 and Viscount aircraft. It became the short-lived "Air Zimbabwe Rhodesia" in 1978, and finally "Air Zimbabwe" in April 1980 when the Republic of Zimbabwe was formed. Services connecting Harare with South Africa (Durban and Johannesburg) had been operated before the country gained its independence. Scheduled services began on to London-Gatwick. The company had leased a Boeing 707 from South African Airways until , when three Boeing 707-320Bs were bought from Lufthansa. That year, flights to Frankfurt were inaugurated. The airline recorded a ZWL 330,000 (£220,000) profit