Editing Boeing 767 (section)

===Production and testing===
To produce the 767, Boeing formed a network of subcontractors which included domestic suppliers and international contributions from Italy's Aeritalia and Japan's CTDC.<ref name=n156/> The wings and cabin floor were produced in-house, while Aeritalia provided control surfaces, [[Boeing Rotorcraft Systems|Boeing Vertol]] made the [[leading edge]] for the wings, and [[Spirit AeroSystems|Boeing Wichita]] produced the forward fuselage.<ref name=saver/> The CTDC provided multiple assemblies through its constituent companies, namely [[Fuji Heavy Industries]] ([[Aircraft fairing|wing fairings]] and gear doors), [[Kawasaki Heavy Industries]] (center fuselage), and [[Mitsubishi Heavy Industries]] (rear fuselage, doors, and tail).<ref name=n156/> Components were integrated during final assembly at the Everett factory.<ref name=saver/> For expedited production of wing [[Spar (aviation)|spars]], the main structural member of aircraft wings, the Everett factory received [[robot]]ic machinery to automate the process of drilling holes and inserting [[fastener]]s.<ref name=saver/> This method of wing construction expanded on techniques developed for the 747.<ref name=saver/> Final assembly of the first aircraft began in July 1979.<ref name=Eden_p102/>

[[File:Boeing 767 Everett, Washington production view.jpg|thumb|Final assembly of a 767-300F at Boeing's [[Boeing Everett Factory|Everett factory]], which was expanded for 767 production in 1978|alt=Airplane assembly hall, featuring an unpainted metallic twin-jet aircraft, a presentation podium, and arranged audience chairs]]
The prototype aircraft, [[aircraft registration|registered]] as [[N767BA]] and equipped with [[Pratt & Whitney JT9D]] turbofans, was rolled out on August 4, 1981.<ref name=Shaw_twins>{{harvnb|Shaw|1999|page=64}}</ref> By this time, the 767 program had accumulated 173 firm orders from 17 customers, including [[Air Canada]], [[All Nippon Airways]], [[Britannia Airways]], [[Transbrasil]], and [[Trans World Airlines]] (TWA).<ref name=saver/> On September 26, 1981, the prototype took its [[maiden flight]] under the command of company test pilots Tommy Edmonds, Lew Wallick, and John Brit.<ref name=n161/> The maiden flight was largely uneventful, save for the inability to retract the [[landing gear]] because of a [[Hydraulics|hydraulic]] fluid leak.<ref name=n161/> The prototype was used for subsequent flight tests.<ref name=b17/>

The 10-month 767 flight test program utilized the first six aircraft built.<ref name=Eden_p102/><ref name=b17/> The first four aircraft were equipped with JT9D engines, while the fifth and sixth were fitted with CF6 engines.<ref name=Eden_p103/><ref name=b50>{{Harvnb|Birtles|1999|pp=49–52}}</ref> The test fleet was largely used to evaluate avionics, flight systems, handling, and performance,<ref name=b50/> while the sixth aircraft was used for route-proving flights.<ref name=testing/> During testing, pilots described the 767 as generally easy to fly, with its maneuverability unencumbered by the bulkiness associated with larger wide-body jets.<ref name=testing>{{cite web|url=http://www.flightglobal.com/pdfarchive/view/1982/1982%20-%200710.html|title=Boeing tests the twins|last=Sweetman|first=Bill|date=March 20, 1982|work=Flight International|access-date=July 15, 2011}}</ref> Following 1,600 hours of flight tests, the JT9D-powered 767-200 received certification from the US [[Federal Aviation Administration]] (FAA) and the UK [[Civil Aviation Authority (United Kingdom)|Civil Aviation Authority]] (CAA) in July 1982.<ref name=n161>{{harvnb|Norris|Wagner|1998|pp=161–62}}</ref><ref name=b17>{{harvnb|Birtles|1999|pp=16–18, 27}}</ref> The first delivery occurred on August 19, 1982, to United Airlines.<ref name=n161/> The CF6-powered 767-200 received certification in September 1982, followed by the first delivery to Delta Air Lines on October 25, 1982.<ref name=Eden_p103/>