The Boeing 777 is a family of long-range wide-body twin-engine jet airliners developed and manufactured by Boeing Commercial Airplanes. It is the world's largest twinjet and has a typical seating capacity of 314 to 396 passengers, with a range of 5,240 to 8,555 nautical miles. Commonly referred to as the "Triple Seven”, its distinguishing features include the largest-diameter turbofan engines of any aircraft, six wheels on each main landing gear, fully circular fuselage cross-section, and a blade-shaped tail cone.
Developed in consultation with eight major airlines, the 777 was designed to replace older wide-body airliners and bridge the capacity difference between Boeing's 767 and 747. As Boeing's first fly-by-wire airliner, it has computer-mediated controls. It was also the first commercial aircraft to be designed entirely with computer-aided design.
The 777 is produced in two fuselage lengths. The original 777-200 variant entered commercial service in 1995, followed by the extended-range 777-200ER in 1997. The stretched 777-300, which is 10.1 m longer, followed in 1998. The initial 777-200, extended-range -200ER, and -300 versions are equipped with General Electric GE90, Pratt & Whitney PW4000, or Rolls-Royce Trent 800 engines.
They have since been collectively referred to as 777 Classics. The extended-range 777-300ER and ultra-long-range 777-200LR variants entered service in 2004 and 2006 respectively, while the 777F, a freighter version, debuted in February 2009; these second generation variants all feature high-output GE90 engines and extended raked wingtips. The 777-200LR is one of the world's longest-range airliners, able to fly more than halfway around the globe and holds the record for the longest distance flown non-stop by a commercial aircraft. In November 2013, Boeing announced the development of the third-generation of the 777, the 777X, initially consisting of the 777-8 and 777-9 "mini-jumbo jet" variants. The 777X features composite folding wings and GE9X engines plus further technologies developed for the 787, and scheduled to enter service by 2020.
The 777 first entered commercial service with United Airlines on June 7, 1995. The 777 has received more orders than any other wide-body airliner; as of October 2017, more than 60 customers had placed orders for 1,957 aircraft of all variants, with 1,520 delivered. The most common and successful variant is the 777-300ER with 758 delivered and 829 orders; Emirates operates the largest 777 fleet, with 161 passenger and freighter aircraft as of July 2017. The 777 has been involved in six hull losses as of October 2016; the Asiana Airlines Flight 214 accident in July 2013 was its first fatal crash in 18 years of service.
The 777 ranks as one of Boeing's best-selling models. Airlines have acquired the type as a comparatively fuel-efficient alternative to other wide-body jets and have increasingly deployed the aircraft on long-haul transoceanic routes. Direct market competitors include the Airbus A330-300, the Airbus A350 XWB, and the out-of-production A340 and McDonnell Douglas MD-11. The 787 Dreamliner, which entered service in 2011, shares design features and a common type rating for pilots with the 777.