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 trainee first officer took 2–3 seconds. After investigating the crash for one year and four months, the AAIB published its final report in September 1978, stating the probable cause of the accident: "A loss of control which resulted from a delay in taking full corrective action during a simulated outboard engine failure exercise during take-off." G-APFK was damaged beyond repair in the accident and fire. It was written off in November 1978 and scrapped in 1979. 1977 British Airtours Boeing 707 crash On 17 March 1977 a British Airtours Boeing 707 being used for pilot training crashed and caught fire