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
William Boeing 74, just three days before his 75th birthday, and a year before the first successful commercial jet airliner, the Boeing 707, would take its first flight. He was pronounced dead on arrival at the Seattle Yacht Club, having had a heart attack aboard his yacht in Puget Sound, Washington. His ashes were scattered off the coast of British Columbia, where he spent much of his time sailing the "Taconite", his yacht. He was posthumously inducted into the Aviation Hall of Fame in Dayton, Ohio, in 1966. In 1984, Boeing was inducted into the International Air & Space Hall of Fame