Boeing 707 lb (57.8 kN) with water injection. Maximum takeoff weight was 247,000 lb and first flight was on December 20, 1957. Major orders were the launch order for 20 707-121 aircraft by Pan Am and an American Airlines order for 30 707-123 aircraft. The first revenue flight was on October 26, 1958; 56 were built, plus seven short-bodied −138s; the last −120 was delivered to Western in May 1960. The 707-138 was a −120 with a fuselage 10 ft shorter than the others, with 5 ft (three frames) removed ahead and behind the wing, giving increased range. Maximum takeoff weight was
1977 British Airtours Boeing 707 crash 1977 British Airtours Boeing 707 crash On 17 March 1977 a British Airtours Boeing 707 being used for pilot training crashed and caught fire during its take-off roll at Glasgow Prestwick Airport. All four crew members on board survived. The aircraft was a Boeing 707-436, registered as G-APFK, and first flew in 1960. Its construction number was 17712 and its four engines were Rolls-Royce Conway 508 turbines. The aircraft entered service with BOAC on 29 September 1960, transferred to BEA Airtours on 30 December 1971 and finally British Airtours on 1 April 1974. Onboard were: a 29-year-old first officer trainee;