Editing Boeing 707 (section)

===Production and testing===
[[File:Boeing 707-123B, American Airlines JP6986482.jpg|thumb|Boeing 707 six-abreast cabin]]

The first flight of the first-production 707-120 took place on December 20, 1957, and FAA certification followed on September 18, 1958.<ref name="Pither21">{{harvnb|Pither|1998|p=21}}</ref> Both test pilots [[Joseph John "Tym" Tymczyszyn]] and James R. Gannett were awarded the first [[Iven C. Kincheloe Award]] for the test flights that led to certification.<ref>[http://www.setp.org/about-setp/history.html "Society of Experimental Test Pilots, History."] ''setp.org''. Retrieved January 11, 2014.</ref> A number of changes were incorporated into the production models from the prototype. A [[Krueger flaps|Krueger flap]] was installed along the leading edge between the inner and outer engines on early 707-120 and -320 models.<ref name="Bowers434">{{harvnb|Bowers|1989|p=434}}</ref><ref name="airlinercafe.com">[http://www.airlinercafe.com/page.php?id=72 "Boeing 707."] {{Webarchive|url=https://web.archive.org/web/20210317031322/https://www.airlinercafe.com/page.php?id=72 |date=March 17, 2021}} ''airlinercafe.com''. Retrieved December 27, 2009.</ref> This was in response to [[de Havilland Comet]] overrun accidents which occurred after over-rotating on take-off. Wing stall would also occur on the 707 with over-rotation so the leading-edge flaps were added to prevent stalling even with the tail dragging on the runway.<ref>Cook, William H. ''Road to the 707: The Inside Story of Designing the 707''. Bellevue, WA: TYC Publishing Company, 1991. {{ISBN|978-0-9629605-0-5}}, p.249</ref>