Editing Boeing 707 (section)

===707-320C===
[[File:Ecuatoriana Boeing 707-321C Hoppe.jpg|thumb|The 707-320C, a [[combi aircraft|convertible]] passenger–freight configuration]]

The 707-320C has a convertible passenger–freight configuration, which became the most widely produced variant of the 707. The 707-320C added a strengthened floor and a new cargo door to the -320B model. The wing was fitted with three-section leading-edge flaps which allowed the removal of the underfin. A total of 335 of this variant were built, including some with JT3D-7 engines ({{cvt|19,000|lbf|kN}} takeoff thrust) and a takeoff weight of {{cvt|335000|lb}}. Most -320Cs were delivered as passenger aircraft with airlines hoping the cargo door would increase second-hand values. The addition of two new emergency exits, one on each side aft of the wing, raised the maximum passenger limit to 219.{{Citation needed|date= January 2019}} Only a few aircraft were delivered as pure freighters. One of the final orders was by the Iranian Government for 14 707-3J9C aircraft capable of VIP transportation, communication, and in-flight refueling tasks.<ref>{{citation |url= https://www.alef.ir/news/3971024133.html |title=جزئیات پرواز ۱۴ فروند بوئینگ ۷۰۷ در ایران/توقف تولید ۷۰۷ از سال ۱۹۷۹ |work=جامعه خبری تحلیلی الف |language=fa |archive-url=https://web.archive.org/web/20200115020535/https://www.alef.ir/news/3971024133.html |date=December 24, 2016 |archive-date=January 15, 2020 |access-date=November 30, 2021 |url-status=live}}</ref>