Boeing 737 Next Generation
|Boeing 737 Next Generation
|Air Berlin 737-700 in Boeing Dreamliner livery|
|Role||Narrow-body jet airliner|
|National origin||United States|
|Manufacturer||Boeing Commercial Airplanes|
|First flight||February 9, 1997|
|Introduction||1998 with Southwest Airlines|
|Primary users||Southwest Airlines
|Number built||4,733 as of December 31, 2013|
|Developed from||Boeing 737 Classic|
|Variants||Boeing Business Jet
Boeing 737 AEW&C
Boeing C-40 Clipper
Boeing P-8 Poseidon
|Developed into||Boeing 737 MAX|
The Boeing 737 Next Generation, commonly abbreviated as Boeing 737NG, is the name given to the −600/-700/-800/-900 series of the Boeing 737 aircraft. It is the third generation derivative of the 737, and follows the 737 Classic (−300/-400/-500) series, which began production in the 1980s. They are short- to medium-range, narrow-body jet airliners. Produced since 1996 by Boeing Commercial Airplanes, the 737NG series includes 4 variations and can seat between 110 to 210 passengers.
A total of 4,733 737NG aircraft have been delivered by the end of December 2013, with more than 6,600 ordered. Currently, only the -700, -800, and -900ER are produced, as the -600 was not popular, and neither was the -900. Its primary competition is with the Airbus A320 family. Upgraded and re-engined models in development as the 737 MAX series will eventually supplant the 737NG.
- 1 Design and development
- 2 Variants
- 3 Operators
- 4 Orders and deliveries
- 5 Accidents and incidents
- 6 Specifications
- 7 See also
- 8 References
- 9 External links
Design and development
Prompted by the development of the Airbus A320, which incorporated ground-breaking technologies such as fly-by-wire, in 1991 Boeing initiated development of an updated series of aircraft. After working with potential customers, the 737 Next Generation (NG) program was announced on November 17, 1993. The 737NG encompasses the −600, −700, −800 and −900 variants, and is to date the most significant upgrade of the airframe. The performance of the 737NG is essentially that of a new airplane, but important commonality is retained from previous 737 generations. The wing was modified, increasing its area by 25% and span by 16 ft (4.88 m), which increased the total fuel capacity by 30%. New quieter and more fuel-efficient CFM56-7B engines were used. These improvements combine to increase the 737's range by 900 nmi, permitting transcontinental service. A flight test program was operated by 10 aircraft; 3 -600s, 4 -700s, and 3 -800s.
In terms of the passenger cabin, the interior on the 737 Next Generation improved on the previous style interior used on the Boeing 757-200 and the Boeing 737 Classic by incorporating select features of the 777-style interior, most noticeably larger, more rounded overhead bins and curved ceiling panels. The interior of the 737 Next Generation also became the standard interior on the Boeing 757-300, and subsequently became optional on the 757-200.
In 2010, the interior of the 737 Next Generation was updated to look similar to that of the Boeing 787. Known as the Boeing Sky Interior, it introduces new pivoting overhead bins (a first for a Boeing narrowbody aircraft), new sidewalls, new passenger service units, and LED mood lighting. The Sky Interior cannot be retrofitted onto existing aircraft; however, similar aftermarket packages to simulate the look of the Sky Interior, including similar pivoting overhead bins for existing 737 and 757 aircraft are available from components provider Heath Tecna.
Production and testing
The first NG to roll out was a −700, on December 8, 1996. This aircraft, the 2,843rd 737 built, first flew on February 9, 1997 with pilots Mike Hewett and Ken Higgins. The prototype −800 rolled out on June 30, 1997 and first flew on July 31, 1997, piloted by Jim McRoberts and again by Hewett. The smallest of the new variants, the −600 series, is identical in size to the −500, launching in December 1997 with an initial flight occurring January 22, 1998; it was granted FAA certification on August 18, 1998.
In 2004, Boeing offered a Short Field Performance package in response to the needs of Gol Transportes Aéreos, who frequently operate from restricted airports. The enhancements improve takeoff and landing performance. The optional package is available for the 737NG models and standard equipment for the 737-900ER.
In July 2008, Boeing offered Messier-Bugatti-Dowty's new carbon brakes for the Next-Gen 737s, which are intended to replace steel brakes and will reduce the weight of the brake package by 550–700 pounds (250–320 kg) depending on whether standard or high-capacity steel brakes were fitted. A weight reduction of 700 pounds (320 kg) on a Boeing 737-800 results in 0.5% reduction in fuel burn. Delta Air Lines received the first Next-Gen 737 model with this brake package, a 737-700, at the end of July 2008.
On August 21, 2006, Sky News alleged that Boeing's Next Generation 737s built from 1994 to 2002 contained defective parts. The report stated that various parts of the airframe produced by Ducommun were found to be defective by Boeing employees but that Boeing refused to take action. Boeing said that the allegations were "without merit". However, a one year investigation by Al Jazeera's People & Power series in 2010 questions the safety of some structural parts in 737s.
Replacement and re-engining
Since 2006, Boeing has discussed replacing the 737 with a "clean sheet" design (internally named "Boeing Y1") that could follow the Boeing 787 Dreamliner. A decision on this replacement was postponed, and delayed into 2011.
On July 20, 2011, Boeing announced plans for a new 737 version to be powered by the CFM International LEAP-X engine, with American Airlines intending to order 100 of these aircraft. Internally, a minimum change version of the Leap-X is the probable final configuration for the proposed re-engined 737, and is expected to give a 10–12% improvement in fuel burn. A service entry in 2016 or 2017 is expected, with the new models probably being designated 737-7/-8/-9, being based on the 737-700/-800/-900ER respectively.
On August 30, 2011, Boeing confirmed the launch of the 737 new engine variant, called the 737 MAX, with 496 order commitments from five airlines. Its new CFM International LEAP-1B engines are expected to provide a 16% lower fuel burn than the current Airbus A320. The 737 MAX is to compete with the Airbus A320neo.
The 737-600 is the direct replacement of the 737-500 and competes with the Airbus A318. The Boeing 737-600 did not include winglets as an option. WestJet was to be the Boeing launch customer for the 737-600 winglets, but announced in their Q2 2006 results that they were not going to move ahead with those plans. The 737-600 was launched by Scandinavian Airlines (SAS) in 1995 with the first aircraft delivered on September 18, 1998. A total of 69 -600s have been delivered.
As of 2012, Boeing has removed the 737-600 from their list of aircraft prices, presumably indicating the variant is now out of production.
The 737-700 was the first of the Next Generation series when launch customer Southwest Airlines ordered the variant in November 1993. The variant was based on the 737-300 and entered service in 1998. It replaced the 737-300 in Boeing's lineup, and its direct competitor is the A319. It typically seats 137 passengers in a two-class cabin or 149 in all-economy configuration. The primary user of the 737-700 series is Southwest Airlines. They operate close to 400 of these aircraft and have more on order.
The 737-700C is a convertible version where the seats can be removed to carry cargo instead. There is a large door on the left side of the aircraft. The United States Navy was the launch customer for the 737-700C under the military designation C-40 Clipper.
Boeing launched the 737-700ER (ER for extended range) on January 31, 2006. All Nippon Airways is the launch customer, with the first one of five 737-700ERs delivered on February 16, 2007. The 737-700ER is a mainline passenger version of the BBJ1 and 737-700IGW. It combines the 737-700 fuselage with the wings and landing gear of a 737-800. It offers a range of 5,510 nautical miles (10,200 km), with seating for 126 passengers in a traditional two-class configuration. A competitor to this model would be the A319LR. The 737-700ER has the second longest range for a 737 after the BBJ2. The 737-700ER is inspired by the Boeing Business Jet and is designed for long-range commercial applications.
All Nippon Airways, Japan's second biggest carrier, pioneered the model in Asia with a daily service between Tokyo and Mumbai. ANA's service, believed to be the first all-business class route connecting to a developing country, was to start in September 2007 and use Boeing 737-700ERs outfitted with 38 (38 Club ANA) and 48 (24 Club ANA/24 Economy) in four-across seats configuration and an extra fuel tank. A total of 1,048 -700, 106 -700 BBJ, and 14 -700C aircraft have been delivered as of January 2011.
The 737-800 is a stretched version of the 737-700, and replaces the 737-400. It also filled the gap left by the decision to discontinue the McDonnell Douglas MD-80 and MD-90 following Boeing's merger with McDonnell Douglas. The −800 was launched by Hapag-Lloyd Flug (now TUIfly) in 1994 and entered service in 1998. The 737-800 seats 162 passengers in a two-class layout, or 189 in one class, and competes with the A320. For many airlines in the U.S., the 737-800 replaced aging Boeing 727-200 trijets.
The 737-800 is also among the models replacing the McDonnell Douglas MD-80 series aircraft in airline service; it burns 850 US gallons (3,200 L) of jet fuel per hour, or about 80 percent of the fuel needed by an MD-80 on a comparable flight, even while carrying more passengers than the latter. According to the Airline Monitor, an industry publication, a 737-800 burns 4.88 US gallons (18.5 L) of fuel per seat per hour. Alaska Airlines replaced the MD-80 with the 737-800, saving $2,000 per flight, assuming jet fuel prices of $4 per gallon. The fuel cost of each such flight (2008 prices) on a 737-800 is about $8,500.
On August 14, 2008, American Airlines announced 26 orders for the 737-800 (20 are exercised options from previously signed contracts and six are new incremental orders) as well as accelerated deliveries. A total of 2,135 -800, and 16 -800 BBJ aircraft have been delivered with 1,521 unfilled orders as of January 2011. Ryanair, an Irish low-cost airline is among the largest operators of the Boeing 737-800, with a fleet of over 300 aircraft serving routes across Europe and North Africa.
Boeing later introduced the 737-900, the longest variant to date. Because the −900 retains the same exit configuration of the −800, seating capacity is limited to 177 seats in two classes, or 189 in a single-class layout. Alaska Airlines launched the 737-900 in 1997 and accepted delivery on May 15, 2001. The 737-900 also retains the MTOW and fuel capacity of the −800, trading range for payload. These shortcomings until recently prevented the 737-900 from effectively competing with the Airbus A321.
The 737-900ER (ER for extended range), which was called the 737-900X prior to launch, is the newest addition and the largest variant of the Boeing 737 line and was introduced to meet the range and passenger capacity of the discontinued 757-200 and to directly compete with the Airbus A321.
An additional pair of exit doors and a flat rear pressure bulkhead increase seating capacity to 180 passengers in a 2-class configuration or 215 passengers in a single-class layout. Additional fuel capacity and standard winglets improve range to that of other 737NG variants.
The first 737-900ER was rolled out of the Renton, Washington factory on August 8, 2006 for its launch customer, Lion Air. Lion Air received this aircraft on April 27, 2007 in a special dual paint scheme combining the Lion Air's logo on the vertical stabilizer and the Boeing's livery colors on the fuselage. Lion Air has orders for 166 737-900ERs as of August 2011.
A total of 52 -900s, 162 -900ERs, and 6 -900 BBJs have been delivered with 366 unfilled orders for the -900ER and one unfilled order for the -900 BBJ as of March 2013.
- Boeing 737 AEW&C – The Boeing 737 AEW&C is a 737-700IGW roughly similar to the 737-700ER. This is an Airborne Early Warning and Control (AEW&C) version of the 737NG. Australia is the first customer (as Project Wedgetail), followed by Turkey and South Korea.
- C-40 Clipper – The C-40A Clipper is a 737-700C used by the U.S. Navy as a replacement for the C-9B Skytrain II. The C-40B and C-40C are used by the US Air Force for transport of generals and other senior leaders.
- P-8 Poseidon – The P-8 is a 737-800ERX ("Extended Range") that was selected on June 14, 2004 to replace the Lockheed P-3 Orion maritime patrol aircraft. The P-8 is unique in that it has 767-400ER-style raked wingtips, instead of the blended winglets available on 737NG variants. The P-8 is designated 737-800A by Boeing.
Boeing Business Jet
Plans for a business jet version of the 737 are not new. In the late 1980s, Boeing marketed the Boeing 77–33 jet, a business jet version of the 737-300. The name was short-lived. After the introduction of the next generation series, Boeing introduced the Boeing Business Jet (BBJ) series. The BBJ1 was similar in dimensions to the 737-700 but had additional features, including stronger wings and landing gear from the 737-800, and has increased range (through the use of extra fuel tanks) over the other 737 models. The first BBJ rolled out on August 11, 1998 and flew for the first time on September 4.
On October 11, 1999 Boeing launched the BBJ2. Based on the 737-800, it is 5.84 m (19 ft 2 in) longer than the BBJ1, with 25% more cabin space and twice the baggage space, but has slightly reduced range. It is also fitted with auxiliary belly fuel tanks and winglets. The first BBJ2 was delivered on February 28, 2001.
As of July 2013, 4236 Boeing 737 Next Generation aircraft were in commercial service. This includes 53 -600s, 1053 -700s, 2903 -800s and 227 -900s.
Orders and deliveries
Data through December 31, 2013. Updated on January 10, 2014.
Accidents and incidents
- Notable accidents and incidents
- December 8, 2005Southwest Airlines Flight 1248, a 737-700, skidded off a runway upon landing at Chicago Midway International Airport in heavy snow conditions. A six-year-old boy died in a car struck by the airliner after it skidded into a street. People on board the aircraft and on the ground reported several minor injuries. The aircraft involved, N471WN, became N286WN after repairs. –
- September 29, 2006Gol Transportes Aéreos Flight 1907, a 737-800 Brazilian airliner with 154 people on board crashed following a midair collision with an Embraer Legacy 600. All on board the 737-800 were killed. The Legacy landed safely at a Brazilian Air Force Base. –
- May 5, 2007Kenya Airways Flight 507, a 737-800 carrying 105 passengers and nine crew lost contact and crashed into a swamp on a flight to Nairobi, Kenya from Abidjan, Côte d'Ivoire, after making a scheduled stop at Douala, Cameroon. There were no survivors. –
- August 20, 2007China Airlines Flight 120, a Boeing 737-800 inbound from Taipei, caught fire shortly after landing at Naha Airport in Okinawa Prefecture, Japan. There were no fatalities. Following this incident, the FAA issued an Emergency Airworthiness Directive (EAD) on August 25 ordering inspection of all Boeing 737NG series aircraft for loose components in the wing leading edge slats within 24 days. On August 28, after initial reports from these inspections, the FAA issued a further EAD requiring a detailed or borescope inspection within 10 days, and an explicit tightening of a nut-and-bolt assembly within 24 days. –
- November 10, 2008Ryanair Flight 4102, a Boeing 737-800 from Frankfurt-Hahn suffered substantial damage in an emergency landing at Rome Ciampino Airport. The cause of the accident was stated to be birdstrikes affecting both engines. The port undercarriage of the 737 collapsed. The aircraft involved was Boeing 737-8AS EI-DYG (c/n33639, msn 2557). Of the six crew and 166 passengers on board, two crew and eight passengers were taken to hospital with minor injuries. As well as damage to the engines and undercarriage, the rear fuselage was also damaged by contact with the runway. –
- February 25, 2009Turkish Airlines Flight 1951, a Boeing 737-800 coming from Istanbul, crashed during landing into a field near the Polderbaan at Schiphol airport, Amsterdam. The fuselage broke into three pieces after the crash and the engine pylons separated. Of the 135 passengers and crew, there were nine fatalities: five passengers and four crew members (including both pilots and a pilot-in-training), and 84 people suffered injuries. Crash investigations initially focused on a malfunctioning left radio altimeter, which may have resulted in false altitude information causing the autothrottle to reduce power. –
- December 22, 2009American Airlines Flight 331, a 737-800 (registration N977AN) overran the runway at Norman Manley International Airport in Kingston, Jamaica. The aircraft, registration N977AN, overran the runway during a landing hampered by poor weather. The plane continued on the ground outside the airport perimeter and broke apart causing injuries. All 154 persons on board survived. –
- January 25, 2010Ethiopian Airlines Flight 409, a 737-800, crashed into the Mediterranean Sea shortly after take-off from Beirut Rafic Hariri International Airport. The flight had 90 passengers and 8 crew, 50 passengers of which were Lebanese, and was bound for the Ethiopian capital of Addis Ababa. There were no survivors. –
- May 22, 2010Air India Express Flight 812, a 737-800, overran the runway on landing at Mangalore International Airport, killing 158 passengers including six crew on board. There were eight survivors. The airliner overran beyond the middle of the runway hitting the antenna and crashed through the fence at the end of the runway going into the valley 200 feet below. Although the 8,000 ft runway is sufficient for landing there was no bare land at the end of the runway on the table top airport to account for mistakes. –
- August 16, 2010AIRES Flight 8250, a 737-700, crashed and split into three pieces on the Colombian island of San Andres. There was no fire and two fatalities reported. –
- January 5, 2011an attempt was made to hijack Turkish Airlines Flight 1754 from Gardermoen Airport, Oslo to Ataturk International Airport, Istanbul. The hijacker was overpowered by other passengers on the flight and was arrested when the aircraft landed. The flight was being operated by Boeing 737-800 TC-JGZ. –
- July 30, 2011Caribbean Airlines Flight 523, a 737-800, overran the runway in rainy weather and crashed through the perimeter fence while landing at the Cheddi Jagan International Airport in Guyana. The aircraft broke into two at around the first class area. There were no fatalities, but several passengers were injured with at least two passengers suffering broken legs. Caribbean Airlines confirmed 157 passengers and 6 crew members were on board. –
- April 13, 2013Lion Air Flight 904, a 737-800 (registration PK-LKS) from Bandung to Denpasar (Indonesia) with 108 people onboard, undershot runway 09 and crashed into the sea while landing at Ngurah Rai International Airport. The aircraft’s fuselage ruptured slightly near the wings. All passengers and crew were safely evacuated with only minor injuries. –
|Seating capacity||130 (1-class, dense)
123 (1-class, typical)
108 (2-class, typical)
|148 (1-class, dense)
140 (1-class, typical)
128 (2-class, typical)
|189 (1-class, dense)
175 (1-class, typical)
160 (2-class, typical)
|215 (1-class, high density)
204 (1-class, dense)
174 (2-class, typical)
|Seat pitch||30 in (76 cm) (1-class, dense)
32 in (81 cm) (1-class, typical)
36 in (91 cm) & 32 in (81 cm) (2-class, typical)
|28 in (71 cm) (1-class, high density)
30 in (76 cm) (1-class, dense)
36 in (91 cm) & 32 in (81 cm) (2-class, typical)
|Seat width||17.2 in (1-class, 6 abreast seating)|
|Overall length||102 ft 6 in (31.2 m)||110 ft 4 in (33.6 m)||129 ft 6 in (39.5 m)||138 ft 2 in (42.1 m)||110 ft 4 in (33.6 m)|
|Wingspan||117 ft 5 in (35.7 m)||112 ft 7 in (34.3 m)|
|Overall height||41 ft 3 in (12.6 m)||41 ft 2 in (12.5 m)|
|Wing sweepback||25.02° (437 mrad)|
|Wing aspect ratio||9.45|
|Fuselage width||12 ft 4 in (3.76 m)|
|Fuselage Height||13 ft 2 in (4.01 m)|
|Maximum cabin width||11 ft 7 in (3.54 m)|
|Cabin height||7 ft 3 in (2.20 m)|
|Operating empty weight||80,031 lb (36,378 kg)||84,100 lb (38,147 kg)||91,108 lb (41,413 kg)||98,495 lb (44,676 kg)||83,000 lb (37,648 kg)|
|Maximum landing weight||121,500 lb (55,112 kg)||128,928 lb (58,604 kg)||146,300 lb (66,361 kg)||129,200 lb (58,604 kg)|
|Maximum take-off weight||145,500 lb (66,000 kg)||Basic: 154,500 lb (70,080 kg)
ER: 171,000 lb (77,565 kg)
|174,200 lb (79,010 kg)||187,700 lb (85,130 kg)||171,000 lb (77,560 kg)|
|Cargo capacity||756 ft³ (21.4 m³)||966 ft³ (27.3 m³)||1,591 ft³ (45.1 m³)||1,852 ft³ (52.5 m³)||3,800 ft³ (107.6 m³)
40,000 lb (18,200 kg)
|Takeoff run at MTOW
(sea level, ISA)
|5,741 ft (1,750 m)||Basic: 5,249 ft (1,600 m)
ER: 6,890 ft (2,100 m)
|7,874 ft (2,400 m)||9,843 ft (3,000 m)|
|Service ceiling||41,000 ft (12,500 m)|
|Cruising speed||Mach 0.785 (447 kn, 514 mph, 828 km/h)||Mach 0.78 (444 kn, 511 mph, 823 km/h)||Mach 0.78|
|Maximum speed||Mach 0.82 (475 kn, 544 mph, 876 km/h)|
|Range fully loaded||Basic: 3,050 nmi (5,648 km)
WL: 3,225 nmi (5,970 km)
|Basic: 3,365 nmi (6,230 km)
WL: 3,440 nmi (6,370 km)
ER: 5,775 nmi (10,695 km) in 1 class
layout with 9 aux. tanks
|Basic: 3,060 nmi (5,665 km)
WL: 3,115 nmi (5,765 km)
|Basic: 2,700 nmi (4,996 km) in 1 class layout
Basic: 3,200 nmi (5,925 km) in 2 class layout
with 2 aux. tanks
WL: 3,265 NM (6,045 km) in 2 class layout
with 2 aux. tanks
|3,000 nmi (5,555 km)|
|Max. fuel capacity||Non-ER: 6,875 US gal (26,020 L)
ER: 10,707 US gal (40,530 L)
|7,837 US gal (29,660 L)||6,875 US gal (26,020 L)|
|Engine (× 2)||CFM 56-7B20||CFM 56-7B26||CFM 56-7B27||CFM56-7|
|Max. thrust (× 2)||22,700 lbf (101.0 kN)||26,300 lbf (117.0 kN)||27,300 lbf (121.4 kN)||27,300 lb|
|Cruising thrust (× 2)||5,210 lbf (23.18 kN)||5,480 lbf (24.38 kN)|
|Fan tip diameter||61 in (1.55 m)|
|Engine length||98.7 in (2.51 m)|
|Engine ground clearance||18 in (46 cm)||19 in (48 cm)|
- Related development
- Boeing 737
- Boeing 737 Classic
- Boeing 737 MAX
- Boeing T-43
- Boeing Business Jet
- Boeing 737 AEW&C
- C-40 Clipper
- P-8 Poseidon
- Aircraft of comparable role, configuration and era
- Airbus A320 family
- Boeing 717
- Bombardier CSeries
- Comac C919
- Embraer 195
- Irkut MS-21
- McDonnell Douglas MD-90
- Tupolev Tu-204
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- Shaw, Robbie. Boeing 737–300 to 800. St. Paul, Minnesota: MBI Publishing Company, 1999. ISBN 0-7603-0699-0.
|Wikimedia Commons has media related to Boeing 737.|
|Boeing 737NG cutaways|
|Boeing 737-300 cutaway from Flight Global|
|Boeing 737-400 cutaway from Flightglobal.com|
|Boeing 737-500 cutaway from Flight Global|
- 737 page on Boeing.com
- Boeing 737-600/700/800/900 on Aerospace-Technology.com
- Boeing 737NG operator list[dead link]
- Boeing 737NG on Smartcockpit.com[dead link]