Boeing 737 Next Generation

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Boeing 737 Next Generation
Delta Air Lines Boeing 737-832; N3747D@LAX;10.10.2011 622in (6482376485).jpg
The 737-800 is the most common 737NG variant.
Role Narrow-body jet airliner
National origin United States
Manufacturer Boeing Commercial Airplanes
First flightFebruary 9, 1997
IntroductionDecember 17, 1997 with Southwest Airlines [1]
StatusIn service
Primary users Southwest Airlines
United Airlines
American Airlines
Produced1996–present [N 1]
Number built7,074 as of May 2021 [3]
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 737NG, or 737 Next Gen, is a narrow-body aircraft powered by two jet engines and produced by Boeing Commercial Airplanes. Launched in 1993 as the third generation derivative of the Boeing 737, it has been produced since 1997 [4] and is an upgrade of the 737 Classic (−300/-400/-500) series.


It features a redesigned wing with a larger area, a wider wingspan, greater fuel capacity, and higher maximum takeoff weights (MTOW). It is equipped with CFM International CFM56-7 series engines and a glass cockpit and features upgraded and redesigned interior configurations. It has a longer range and larger variants than its predecessor: The series includes four models, the −600/-700/-800/-900, seating between 108 and 215 passengers. The 737NG's primary competition is with the Airbus A320 family.

As of May 2021, a total of 7,121 737NG aircraft had been ordered, of which 7,074 had been delivered, with remaining orders for the -700W, -800, and -800A variants. The most common variant was the 737-800, with 4,991 commercial, 186 military, and 23 corporate jets ordered, of which 4,989, 145, and 21, respectively, had been delivered. [5] Boeing stopped assembling commercial 737NGs in 2019 and made the final deliveries in January 2020. [2] The 737NG is superseded by the fourth generation 737 MAX, introduced in 2017.


The first 737NG, a 737-700, was rolled out on December 8, 1996, and first flew on February 9, 1997, it was later delivered to Southwest Airlines N707SA Southwest Airlines 1998 Boeing 737-7H4 (cn 27841-1) (5289274531).jpg
The first 737NG, a 737-700, was rolled out on December 8, 1996, and first flew on February 9, 1997, it was later delivered to Southwest Airlines


When regular Boeing customer United Airlines bought the more technologically advanced Airbus A320 with fly-by-wire controls, this prompted Boeing to update the slower, shorter-range 737 Classic variants into the more efficient, longer New Generation variants. [6] In 1991, Boeing initiated development of an updated series of aircraft. [7] After working with potential customers, the 737 Next Generation (NG) program was announced on November 17, 1993. [8]


The first NG to roll out was a 737−700, 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 737−800 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. [8] [9] The flight test program used 10 aircraft: 3 -600s, 4 -700s, and 3 -800s. [8]


In 2004, Boeing offered a Short Field Performance package in response to the needs of Gol Transportes Aéreos, which frequently operates 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 737-800 results in 0.5% reduction in fuel burn. [10] Delta Air Lines received the first Next-Gen 737 model with this brake package, a 737-700, at the end of July 2008. [11]

The CFM56-7B Evolution nacelle began testing in August 2009 to be used on the new 737 PIP (Performance Improvement Package) due to enter service mid-2011. This new improvement is said to shave at least 1% off the overall drag and have some weight benefits. Overall, it is claimed to have a 2% improvement on fuel burn on longer stages. [12]

Enhanced Short Runway Package

This short-field design package is an option on the 737-600, -700 and -800 and is standard equipment for the new 737-900ER. These enhanced short runway versions could increase pay or fuel loads when operating on runways under 5,000 feet (1,500 m). Landing payloads were increased by up to 8,000 lb on the 737-800 and 737-900ER and up to 4,000 lb on the 737-600 and 737-700. Takeoff payloads were increased by up to 2,000 lb on the 737-800 and 737-900ER and up to 400 lb on the 737-600 and 737-700. The package includes: [13]

  • A winglet lift credit, achieved through additional winglet testing, that reduces the minimum landing-approach speeds.
  • Takeoff performance improvements such as the use of sealed leading-edge slats on all takeoff flap positions, allowing the airplane to climb more rapidly on shorter runways.
  • A reduced idle thrust transition delay between approach and ground-idle speeds, which improves stopping distances and increases field-length-limited landing weight
  • Increased flight-spoiler deflection from 30o to 60o, improving aerodynamic braking on landing.
  • A two-position tail skid at the rear of the aircraft to protect against inadvertent tailstrikes during landing, which allows higher aircraft approach attitudes and lower landing speeds

The first enhanced version was delivered to Gol Transportes Aéreos (GOL) on July 31, 2006. At that time, twelve customers had ordered the package for more than 250 airframes. Customers include: GOL, Alaska Airlines, Air Europa, Air India, Egyptair, GE Commercial Aviation Services (GECAS), Hapagfly, Japan Airlines, Pegasus Airlines, Ryanair, Sky Airlines and Turkish Airlines. [14]

Structural problems

In 2005, three ex-Boeing employees filed a lawsuit on behalf of the U.S. government, claiming that dozens of 737NG contained defective structural elements supplied by airframe manufacturer Ducommun, allegations denied by Boeing. [15] [16] The federal judge presiding the case sided with Boeing, and a subsequent court of appeal also ruled in favor of the company. [17] A 2010 documentary by Al Jazeera alleged that in three crashes involving 737NGs – Turkish Airlines Flight 1951, American Airlines Flight 331, and AIRES Flight 8250 – the fuselage broke up following impact with the ground because of the defective structural components that were the subject of the 2005 lawsuit. [18] However, the accident investigations in all three cases did not highlight any link between post-impact structural failures and manufacturing issues.

During an inspection of a 737NG in 2019 that had 35,000 flights, fatigue cracks were found on a fuselage to wing attachment known as a "pickle fork", designed to last a lifetime of 90,000 flights. Boeing reported the issue to the FAA at the end of September 2019, and more planes showed similar cracking after inspection. [19] The cracks were found in an airliner with more than 33,500 flights, when it was stripped down for conversion to freighter. Aircraft with more than 30,000 flights (15 years at 2,000 flights per year) should be inspected within one week, while those with over 22,600 flights (11 years) should be inspected within one year. [20] The FAA Airworthiness Directive (AD) was issued on October 3, 2019. [21]

Of the 500 first inspected aircraft, 5% (25) had cracks and were grounded; Boeing expects to repair the first aircraft in three weeks, serving as the template for the resulting Service bulletin. [22] Of the 810 examined aircraft over 30,000 cycles, 38 had structural cracks (4.7%), leaving 1,911 737NGs over 22,600 cycles to be inspected within their next 1,000 cycles, most of the US in-service fleet of 1,930. [23] By early November, 1,200 aircraft were inspected, with cracks on about 60 (5%). Cracks were discovered near fasteners outside the original area in four airplanes. On November 5, Boeing recommended to expand the checks to include them, to be mandated in a November 13 FAA AD. Aircraft below 30,000 cycles have to be reinspected within 1,000 cycles, within 60 days above. About one quarter of the global NG fleet of 6,300 aircraft have to be inspected. [24]

Following the uncontained engine failure of the Southwest Airlines Flight 1380 on April 17, 2018, the NTSB recommended on November 19, 2019, to redesign and retrofit its nacelle for the 6,800 airplanes in service. [25]


The production rate of the Boeing Renton Factory went from 31.5 to 52 per month Boeing Plant in Renton, 5-18-2010 (4622746048).jpg
The production rate of the Boeing Renton Factory went from 31.5 to 52 per month

Boeing was to increase 737 production from 31.5 units per month in September 2010 to 35 in January 2012 and to 38 units per month in 2013. [26] Production rate was 42 units per month in 2014, and was planned to reach rates of 47 units per month in 2017 and 52 units per month in 2018. [27] [28] [29]

In 2016, the monthly production rate was targeted to reach 57 units per month in 2019, even to the factory limit of 63 units later. A single airplane was then produced in the Boeing Renton Factory in 10 days, less than half what it was a few years before. The empty fuselage from Spirit AeroSystems in Wichita, Kansas, enters the plant on Day 1.Electrical wiring is installed on Day 2 and hydraulic machinery on Day 3. On Day 4 the fuselage is crane-lifted and rotated 90 degrees, wings are mated to the airplane in a six-hour process, along with landing gear, and the airplane is again rotated 90°. The final assembly process begins on Day 6 with the installation of airline seats, galleys, lavatories, overhead bins, etc. Engines are attached on Day 8 and it rolls out of the factory for test flights on Day 10. [30]

Boeing stopped assembling passenger 737NGs in 2019. The last aircraft assembled was delivered to KLM in December 2019; the last two deliveries were to China Eastern Airlines on January 5, 2020. Production of the P-8 Poseidon variant continues. [2]

The FAA has proposed a fine of approximately $3.9 million for Boeing's alleged installation of the same faulty components of the 737 MAX on some one hundred and thirty-three 737 NGs. [31]

Further developments

The Boeing 737 MAX first flew on January 29, 2016 Boeing 737-8 MAX N8704Q rotated.jpg
The Boeing 737 MAX first flew on January 29, 2016

From 2006, Boeing discussed replacing the 737 with a "clean sheet" design (internally named "Boeing Y1") that could follow the Boeing 787 Dreamliner. [32] A decision on this replacement was postponed, and delayed into 2011. [33]

In 2011, Boeing launched the 737 MAX, an updated and re-engined version of the 737NG with more efficient CFM International LEAP-1B engines, and aerodynamic changes with distinctive split-tip winglets. [34] The first 737 MAX performed its first flight in January 2016. [35] The fourth generation 737 MAX supersedes the third generation 737NG.


Planform view of 737NG showing the 25% larger and 16 ft (4.9 m) wider wing compared to the 737 Classic Boeing 737-79P, China Eastern Airlines JP6128143.jpg
Planform view of 737NG showing the 25% larger and 16 ft (4.9 m) wider wing compared to the 737 Classic

The wing was redesigned with a new thinner airfoil section, and a greater chord and increased wing span (by 16 ft (4.9 m)) increased the wing area by 25%, which also increased total fuel capacity by 30%. New quieter and more fuel-efficient CFM56-7B engines are used. [36] Higher MTOWs are offered. The 737NG includes redesigned vertical stabilizers, and winglets are available on most models. [37]

The 737NG encompasses the -600, -700, -800, and -900 with improved performance and commonality retained from previous 737 models. The wing, engine, and fuel capacity improvements combined increase the 737's range by 900 nmi (1,700 km) to over 3,000 nmi (5,600 km), [38] permitting transcontinental service. [39]

The Speed Trim System, introduced on the 737 Classic, has been updated for the 737NG to include a stall identification function. Originally inhibited in high alpha scenarios, STS operates at any speed on the 737NG. STS is triggered by airspeed sensor and commands Airplane Nose Down as the airplane slows down. [40]


The flight deck was upgraded with modern avionics, and passenger cabin improvements similar to those on the Boeing 777, including more curved surfaces and larger overhead bins than previous-generation 737s. The Next Generation 737 interior was also adopted on the Boeing 757-300. [41] [42] This improved on the previous interior of the Boeing 757-200 and the Boeing 737 Classic variants, the new interior became optional on the 757-200.

In 2010, new interior options for the 737NG included the 787-style Boeing Sky Interior. [12] It introduced new pivoting overhead bins (a first for a Boeing narrow-body aircraft), new sidewalls, new passenger service units, and LED mood lighting. Boeing's newer "Space Bins" can carry 50 percent more than the pivoting bins, thus allowing a 737-800 to hold 174 carry-on bags. [43] Boeing also offered it as a retrofit for older 737NG aircraft. [44]



The 737-600 is the shortest at 102 ft 6 in (31.24 m), SAS received the first in September 1998 Sas b737-600 ln-rcw arp.jpg
The 737-600 is the shortest at 102 ft 6 in (31.24 m), SAS received the first in September 1998

The 737-600 was launched by SAS in March 1995, with the first aircraft delivered in September 1998. [45] A total of 69 have been produced, with the last aircraft delivered to WestJet in 2006. [5] Boeing displayed the 737-600 in its price list until August 2012. [46] The smallest model offered was then the 737-700. The 737-600 replaces the 737-500 and is similar to the Airbus A318.

Winglets were not an option. [47] WestJet was to launch the -600 with winglets, but dropped them in 2006.


The 737-700 is 110 ft 4 in (33.63 m) long and has a single overwing exit per side, Southwest Airlines took delivery of the first one in December 1997 N785SW BWI MD1.jpg
The 737-700 is 110 ft 4 in (33.63 m) long and has a single overwing exit per side, Southwest Airlines took delivery of the first one in December 1997

In November 1993, Southwest Airlines launched the Next-Generation program with an order for 63 737-700s and took delivery of the first one in December 1997. [1] It replaced the 737-300, typically seating 126 passengers in two classes to 149 in all-economy configuration, similar to the Airbus A319.

In long-range cruise, it burns 4,440 lb (2,010 kg) per hour at Mach 0.785 (450 kn; 834 km/h) and FL410, increasing to 4,620–4,752 lb (2,096–2,155 kg) at Mach 0.80–Mach 0.82 (459–470 kn; 850–871 km/h). [48] As of July 2018, all -700 series on order, 1,128 -700, 120 -700 BBJ, 20 -700C, and 14 -700W aircraft, have been delivered. [5] By June 2018, around one thousand were in service: half of them with Southwest Airlines, followed by Westjet with 56 and United Airlines with 39. The value of a new -700 stayed around $35 million from 2008 to 2018. A 2003 aircraft was valued for $15.5 million in 2016 and $12 million in 2018 and will be scrapped for $6 million by 2023. [49] [ unreliable source? ]

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. [50]


Boeing launched the 737-700ER (Extended Range) on January 31, 2006, with All Nippon Airways as the launch customer. Inspired by the Boeing Business Jet, it features the fuselage of the 737-700 and the wings and landing gear of the 737-800. When outfitted with nine auxiliary fuel tanks, it can hold 10,707 gallons (40,530 L) of fuel, and with a 171,000 lb (77,565 kg) MTOW it has a 5,775 nmi (10,695 km) range with 48 premium seats in one class. This also significantly decreases cargo payload capacity from 966 to 165 cu ft (27.4 to 4.7 m3), trading payload for increased range. [51] The first was delivered on February 16, 2007, to ANA with 24 business class and 24 premium economy seats only. A 737-700 can typically accommodate 126 passengers in two classes. [52] It is similar to the Airbus A319LR.


The 129 ft 6 in (39.47 m) long 737-800 has two overwing exits on each side, Hapag-Lloyd received the first in April 1998 D-ATUF B737-8K5W TUIfly-Hapag retro PMI 26SEP10 (6341092368).jpg
The 129 ft 6 in (39.47 m) long 737-800 has two overwing exits on each side, Hapag-Lloyd received the first in April 1998

The Boeing 737-800 is a stretched version of the 737-700. It replaced the 737-400. The Boeing 737-800 competes primarily with the Airbus A320. The 737-800 seats 162 passengers in a two-class layout or 189 passengers in a one-class layout. The 737−800 was launched on September 5, 1994. [4] Launch customer Hapag-Lloyd Flug (now TUIfly) received the first one in April 1998. [53]

Following Boeing's merger with McDonnell Douglas, the 737-800 also filled the gap left by Boeing's decision to discontinue the McDonnell Douglas MD-80 and MD-90 aircraft. For many airlines in the U.S., the 737-800 replaced aging Boeing 727-200 trijets.

The 737-800 burns 850 US gallons (3,200 L) of jet fuel per hour—about 80 percent of the fuel used by an MD-80 on a comparable flight, while carrying more passengers. [54] The Airline Monitor, an industry publication, quotes a 737-800 fuel burn of 4.88 US gal (18.5 L) per seat per hour, compared to 5.13 US gal (19.4 L) for the A320. [55] In 2011, United Airlines— flying a Boeing 737-800 from Houston to Chicago—operated the first U.S. commercial flight powered by a blend of algae-derived biofuel and traditional jet fuel to reduce its carbon footprint. [56]

In early 2017, a new 737-800 was valued at $48.3 million, falling to below $47 million by mid-2018. [57] [ unreliable source? ] By 2025, a 17-year-old 737-800W will be worth $9.5 million and leased for $140,000 per month. [58] [ unreliable source? ]

As of May 2019, Boeing had delivered 4,979 737-800s, 116 737-800As, and 21 737-800 BBJ2s, and has twelve 737-800 unfilled orders. [5] The 737-800 is the most common variant of the 737NG and is the most widely used narrow-body aircraft. [59] Ryanair, an Irish low-cost airline, is among the largest operators of the Boeing 737-800, with a fleet of over 400 737-800 aircraft serving routes across Europe, Middle East, and North Africa. [60]


The first 737-800BCF Boeing Converted Freighter was delivered to West Atlantic in April 2018 G-NPTA Boeing 737-86N BCF (West Atlantic UK) at East Midlands Airport.jpg
The first 737-800BCF Boeing Converted Freighter was delivered to West Atlantic in April 2018

In February 2016, Boeing launched a passenger-to-freighter conversion program, with converted aircraft designated as 737-800BCF (for Boeing Converted Freighter). Boeing started the program with orders for 55 conversions, with the first converted aircraft due for late 2017 delivery. [61] The first converted aircraft was delivered to West Atlantic in April 2018. [62]

At the 2018 Farnborough Airshow, GECAS announced an agreement for 20 firm orders and 15 option orders for the 737-800BCF, raising the commitment to 50 aircraft. Total orders and commitments include 80 aircraft to over half a dozen customers. [63] Since early 737NG aircraft become available on the market, they have been actively marketed to be converted to cargo planes via the Boeing Converted Freighter design because the operational economics are attractive due to the low operating costs and availability of certified pilots on a robust airframe.[ citation needed ]

Modifications to the 737-800 airframe include installing a large cargo door, a cargo handling system, and additional accommodations for non-flying crew or passengers. [63] The aircraft is designed to fly up to 1,995 nmi (3,695 km) at a MTOW of 174,100 lb (79,000 kg). [64]


In 2015, Boeing launched the 737-800SF passenger to freighter conversion program with Aeronautical Engineers Inc (AEI). The conversion can be completed by AEI or third-parties such as HAECO. GECAS was the initial customer. It has a 52,800 lb (23.9 tonnes) payload capacity, and a range of 2,000 nmi (3,750 km). [65] It received its supplemental type certificate from the FAA in early 2019. [66] In March 2019, the first AEI converted aircraft was delivered to Ethiopian Airlines on lease from GECAS. [67] The Civil Aviation Administration of China cleared it in January 2020. [68] Aircraft lessor Macquarie AirFinance ordered four 737-800SFs in March 2021. [69]


Stretched to 138 ft 2 in (42.11 m) and keeping the double overwing exits, the first 737-900 was delivered to Alaska Airlines on May 15, 2001 EM N323AS (2896342517).jpg
Stretched to 138 ft 2 in (42.11 m) and keeping the double overwing exits, the first 737-900 was delivered to Alaska Airlines on May 15, 2001

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 189 in a high-density 1-class layout, although the 2-class number is lower at approximately 177. Alaska Airlines launched the 737-900 in 1997 and accepted the delivery on May 15, 2001. The 737-900 also retains the MTOW and fuel capacity of the −800, trading range for payload.


The 737-900ER features an extra door aft of the wing, Lion Air received the first one on April 27, 2007 Lionair 737-900 ER first flight.jpg
The 737-900ER features an extra door aft of the wing, Lion Air received the first one on April 27, 2007

The 737-900ER (ER for extended range), which was called the 737-900X before launch, is the newest addition and the largest variant of the Boeing 737 NG line. It 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 increased seating capacity to 180 passengers in a two-class configuration.[ citation needed ] It can accommodate up to 220 passengers. [70]

Some airlines seal the additional exit. Additional fuel capacity and standard winglets improved its 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, an Indonesian low-cost airline. The airline received this aircraft on April 27, 2007, in a special dual paint scheme combining Lion Air's logo on the vertical stabilizer and Boeing's livery colors on the fuselage. Lion Air has orders for 103 Boeing 737-900ERs as of September 2017. [5] Its operators are primarily US carriers and Lion Air.

As of May 2019, 52 -900s, 504 -900ERs, and 7 -900 BBJ3s have been delivered with 1 unfilled order. [5] With a smaller operator base, the -900ER is not as liquid as other variants; in October 2018, a ten-year-old -900ER was worth $19.4 million and leased for $180,000 per month over eight years, below the -800, while there is a premium for the A321 over the A320. By 2025, a seventeen-year-old -900ER will reach $8.5 million with a $120,000 lease, $1 million and $20,000 less per month than a -800W of the same age and could be parted out[ clarification needed ] or converted to a freighter. [58] [ unreliable source? ]

Military models

Airborne early warning and control with a Boeing 737 AEW&C gongjungjogigyeongbotongjegi (7445565660).jpg
Airborne early warning and control with a Boeing 737 AEW&C

Boeing Business Jet

A typical BBJ cabin Boeing 737-75V BBJ AN1425895.jpg
A typical BBJ cabin

In the late 1980s, Boeing marketed the Boeing 77-33 jet, a business jet version of the 737-300. [73] 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 than the 737-800, and has increased range (through the use of extra fuel tanks) over the other various 737 models. The first BBJ rolled out on August 11, 1998, and flew for the first time on September 4. [74]

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. [74]

The BBJ3 aircraft is based on the 737-900ER aircraft. [75] In January 2014, three 737-900ER aircraft had been configured as BBJ3 business jets for Saudi Arabian customers. The BBJ3 is approximately 16 feet longer than the 737-800/BBJ2 and has a slightly shorter range. [76]


As of July 2018, 6,343 Boeing 737 Next Generation aircraft were in commercial service. This comprised 39 -600s, 1,027 -700s, 4,764 -800s and 513 -900s. [77]

Orders and deliveries

Boeing 737 Next Generation orders and deliveries
Model seriesTotalUnfilledTotal202020192018201720162015201420132012201120102009200820072006200520042003200220012000199919981997
(Commercial Jets)6,76726,7652523054384904764694264023603633622823242862061981662122812692531583
737-700W 173142252111
737-800A 1753613913171817181513895132
(Military Jets)192391531317181718151389535252111
BBJ 737-70012112111315274446933381311258
BBJ 737-800232212122121325
BBJ 737-900771411
(Business jets)151214911436471056611436101811258
(737 NextGen)7,110437,06715703244554904954854404153723763722903303022122021732232992802781663

Data through October 31, 2020 [5]

Accidents and incidents

According to the Aviation Safety Network, the Boeing 737 Next Generation series has been involved in 22hull-loss accidents and 13 hijackings, for a total of 767 fatalities. [78] [ as of? ]

An analysis by Boeing of commercial jet airplane accidents in the period 1959–2017 showed that the Next Generation series had a hull loss rate of 0.17 per million departures compared to 0.71 for the classic series and 1.75 for the original series. [79]


Boeing 737 Characteristics [80]
Cockpit crewTwo
2-class:56–62108 (8F @36" 100Y @32")128 (8F @36" 120Y @32")160 (12F @36" 148Y @32")177 (12F @36" 165Y @32")
1-class:56–62123 @32" - 130 @30"140 @32" - 148 @30"175 @32" - 184 @30"177 @32" - 215 @28"
Exit Limit [81] 149189220
Seat width:67First: 22 in / 56 cm; Economy: 17 in / 43 cm
Length:34–41102 ft 6 in / 31.24 m110 ft 4 in / 33.63 m129 ft 6 in / 39.47 m138 ft 2 in / 42.11 m
Height:34–4141 ft 3 in / 12.57 m41 ft 2 in / 12.55 m
Wing [82] Span: 112 ft 7 in / 34.32 m, with winglets: 117 ft 5 in / 35.79 m;:34–41 Area: 124.60 m2 (1,341.2 sq ft); Sweepback: 25°; AR: 9.44
Fuselage:67Width: 12 ft 4 in (3.76 m); Cabin width: 11 ft 7 in (3.53 m); Cabin height: 86.6 in (2.20 m)
OEW :21–2480,200 lb / 36,378 kg83,000 lb / 37,648 kg91,300 lb / 41,413 kg98,495 lb / 44,677 kg
MLW :21–24121,500 lb / 55,111 kg129,200 lb / 58,604 kg146,300 lb / 66,361 kg157,300 lb / 71,350 kg
MTOW :21–24144,500 lb / 65,544 kg154,500 lb / 70,080 kg174,200 lb / 79,016 kg187,700 lb / 85,139 kg
Fuel capacity:21–246,875 US gal / 26,022 L7,837 US gal / 29,666 L [lower-alpha 1]
Lower deck cargo:21–24720 ft³ / 20.4 966 ft³ / 27.4 1,555 ft³ / 44.1 1,826 ft³ / 51.7 
Takeoff run [lower-alpha 2] [82] 6,161 ft (1,878 m)6,699 ft (2,042 m)7,598 ft (2,316 m)9,800 ft (3,000 m):159
Flight envelope [81] 41,000 feet (12,497 m) Ceiling, Mach 0.82 (470 kn; 871 km/h) MMo
Cruise [83] Mach 0.785 (453 kn; 838 km/h)Mach 0.781 (450 kn; 834 km/h)Mach 0.789 (455 kn; 842 km/h)Mach 0.79 (455 kn; 844 km/h)
Range [84] 3,235 nmi (5,991 km) [lower-alpha 3] [83] 3,010 nmi (5,570 km) [lower-alpha 4] 2,935 nmi (5,436 km) [lower-alpha 5] 2,950 nmi (5,460 km) [lower-alpha 6]
Engines (× 2) CFM56-7B18/20/22:126–133CFM56-7B20/22/24/26/27:134–149CFM56-7B24/26/27:150–161
Thrust (× 2)20,000–22,000 lbf
89–98 kN:126–133
20,000–26,000 lbf
89–116 kN:134–149
24,000–27,000 lbf
110–120 kN:150–153
24,000–27,000 lbf
110–120 kN:154–161
Cruise max. thrust [lower-alpha 7] [85] 5,960 lbf (26.5 kN) (climb)
Engine dimensions [85] Fan tip diameter: 61 in (155 cm), length: 103.50 in (263 cm)
Engine ground clearance18 in / 46 cm:4419 in / 48 cm:45
ICAO Type Designator [86] B736B737B738B739
  1. two auxiliary tanks
  2. MTOW, sea level, ISA+20°C
  3. 110 passengers
  4. 126 passengers
  5. 162 passengers
  6. 178 passengers
  7. 35,000 ft – Mach 0.8 – ISA

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The Boeing 767 is a wide-body airliner developed and manufactured by Boeing Commercial Airplanes. The airliner was launched as the 7X7 project on July 14, 1978, the prototype first flew on September 26, 1981, and it was certified on July 30, 1982. The original 767-200 entered service on September 8, 1982 with United Airlines, and the extended-range 767-200ER in 1984. It was stretched into the 767-300 in October 1986, followed by the 767-300ER in 1988, the most popular variant. The 767-300F, a production freighter version, debuted in October 1995. It was stretched again into the 767-400ER from September 2000.

Boeing 777 Wide-body, long-range, twin-engine jet airliner family

The Boeing 777, commonly referred to as the Triple Seven, is an American wide-body airliner developed and manufactured by Boeing Commercial Airplanes. It is the world's largest twinjet. The 777 was designed to bridge the gap between Boeing's 767 and 747, and to replace older DC-10s and L-1011s. Developed in consultation with eight major airlines, with a first meeting in January 1990, the program was launched on October 14, 1990, with an order from United Airlines. The prototype was rolled out on April 9, 1994, and first flew on June 12, 1994. The 777 entered service with the launch customer, United Airlines, on June 7, 1995. Longer range variants were launched on February 29, 2000, and were first delivered on April 29, 2004.

Boeing 737 Single aisle airliner family by Boeing

The Boeing 737 is a narrow-body airliner produced by Boeing at its Renton Factory in Washington. Developed to supplement the Boeing 727 on short and thin routes, the twinjet retains the 707 fuselage cross-section and nose with two underwing turbofans. Envisioned in 1964, the initial 737-100 made its first flight in April 1967 and entered service in February 1968 with Lufthansa. The lengthened 737-200 entered service in April 1968. It evolved through four generations, offering several variants for 85 to 215 passengers.

Airbus A319 Airliner, shortened variant of the A320 family

The Airbus A319 is a member of the Airbus A320 family of short- to medium-range, narrow-body, commercial passenger twin-engine jet airliners manufactured by Airbus. The A319 carries 124 to 156 passengers and has a maximum range of 3,700 nmi. Final assembly of the aircraft takes place in Hamburg, Germany and Tianjin, China.

Airbus A320 family Airliner family by Airbus

The Airbus A320 family are narrow-body airliners designed and produced by Airbus. The A320 was launched in March 1984, first flew on 22 February 1987, and was introduced in April 1988 by Air France. The first member of the family was followed by the longer A321, the shorter A319, and the even shorter A318 . Final assembly takes place in Toulouse in France; Hamburg in Germany; Tianjin in China since 2009; and in Mobile, Alabama in the United States since April 2016.

Wingtip device Aircraft component fixed to the end of the wings to improve performance

Wingtip devices are intended to improve the efficiency of fixed-wing aircraft by reducing drag. Although there are several types of wing tip devices which function in different manners, their intended effect is always to reduce an aircraft's drag by partial recovery of the tip vortex energy. Wingtip devices can also improve aircraft handling characteristics and enhance safety for following aircraft. Such devices increase the effective aspect ratio of a wing without greatly increasing the wingspan. Extending the span would lower lift-induced drag, but would increase parasitic drag and would require boosting the strength and weight of the wing. At some point, there is no net benefit from further increased span. There may also be operational considerations that limit the allowable wingspan.

Boeing 747-400 Wide-body airliner, improved production series of the 747

The Boeing 747-400 is a wide-body airliner produced by Boeing Commercial Airplanes, an advanced variant of the initial Boeing 747. The "Advanced Series 300" was announced at the September 1984 Farnborough Airshow, targeting a 10% cost reduction with more efficient engines and 1,000 nmi (1,850 km) more range. Northwest Airlines (NWA) became the first customer with an order for 10 aircraft on October 22, 1985. The first 747-400 was rolled out on January 26, 1988, and made its maiden flight on April 29, 1988. Type certification was received on January 9, 1989, and it entered service with NWA on February 9, 1989.

Boeing Business Jet Executive transport variants of several Boeing airliners

The Boeing Business Jet series are variants of Boeing jet airliners for the corporate jet market.

Boeing Commercial Airplanes Division of the Boeing Company that builds commercial jet airplanes

Boeing Commercial Airplanes (BCA) is a division of the Boeing Company. It designs, assembles, markets, and sells jet airliners and business jets, and also provides product-related maintenance and training to customers worldwide. BCA operates out of its division headquarters in Renton, Washington, and has more than a dozen engineering, manufacturing, and assembly facilities located throughout the U.S. and internationally. It includes the assets of the Douglas Aircraft division of the former McDonnell Douglas Corporation, which merged with Boeing in 1997. As of the beginning of 2020, BCA employed almost 65,000 people.

Singapore Airlines operates a predominantly widebody fleet, until the re-introduction of the Boeing 737 in March 2021 following the merger with SilkAir. The airline also operates Boeing 747-400 freighters. As of 1 June 2021, there were 150 passenger aircraft and seven freighters registered in the Singapore Airlines fleet.

SpiceJet is an Indian low-cost airline headquartered in Gurgaon, Haryana. It is the second largest airline in the country by number of domestic passengers carried, with a market share of 13.6% as of March 2019. The airline operates 630 daily flights to 64 destinations, including 54 Indian and 15 international destinations from its hubs at Delhi and Hyderabad.

Precision Manuals Development Group is a commercial add-on aircraft developer for the Microsoft Flight Simulator, Lockheed Martin Prepar3D, and X-Plane series. The company was founded by airline pilot Robert S. Randazzo, who stated that his ultimate goal was to develop the software to the point where it could be used by airlines and manufacturers to supplement pilot training. The company is based out of Virginia but has several employees in countries such as Belgium, South Africa, and Canada. It has eight employees as of 2018, with a collection of beta testers which include multiple aviation professionals.

Air transports for heads of state and government are, in many countries, provided by the air force in specially equipped airliners or business jets. One such aircraft in particular has become part of popular culture: Air Force One, used by the President of the United States and operated by the United States Air Force. Other well known official aircraft include the Russian presidential aircraft, the British Royal Air Force VIP aircraft, the French "Cotam 001" operated by the ETEC 65, the Royal Canadian Air Force VIP aircraft, the German Konrad Adenauer, the Royal Australian Airforce VIP aircraft, the Japanese Air Force One, the South Korean Code One, Air India One, and the Brazilian Air Force One.

Aviation Partners

Aviation Partners Inc. (API) is a Seattle-based private corporation that specializes in performance-enhancing winglet systems. The corporation was founded in 1991 and is owned by The Washington Companies.

Competition between Airbus and Boeing

The competition between Airbus and Boeing has been characterised as a duopoly in the large jet airliner market since the 1990s. This resulted from a series of mergers within the global aerospace industry, with Airbus beginning as a pan-European consortium while the American Boeing absorbed its former arch-rival, McDonnell Douglas, in 1997. Other manufacturers, such as Lockheed Martin and Convair in the United States, and British Aerospace and Fokker in Europe, were no longer able to compete and effectively withdrew from this market.

Boeing 737 Classic Airliner family by Boeing

The Boeing 737 Classic are narrow-body airliners produced by Boeing Commercial Airplanes, the second generation of the original Boeing 737-100/-200. Development began in 1979 and the first variant, the 737-300, first flew in February 1984 and entered service in December of that year. The stretched 737-400 first flew in February 1988 and entered service later that year. The shortest variant, the 737-500, first flew in June 1989 and entered service in 1990.

Boeing 737 MAX Airliner family by Boeing

The Boeing 737 MAX is the fourth generation of Boeing 737, a narrow-body airliner manufactured by Boeing Commercial Airplanes (BCA). It succeeds the Boeing 737 Next Generation (NG) and competes with the Airbus A320neo family. The 737 MAX is based on earlier 737 designs, with more efficient CFM International LEAP-1B engines, aerodynamic changes, including its distinctive split-tip winglets, and airframe modifications. The new series was publicly announced on August 30, 2011. It took its maiden flight on January 29, 2016 and was certified by the U.S. Federal Aviation Administration (FAA) in March 2017. The first delivery was a MAX 8 in May 2017 to Malindo Air, with whom it commenced service on May 22, 2017.

Boeing 777X Next generation of the Boeing 777

The Boeing 777X is the latest series of the long-range, wide-body, twin-engine Boeing 777 family from Boeing Commercial Airplanes. The 777X features new GE9X engines, new composite wings with folding wingtips, greater cabin width and seating capacity, and technologies from the Boeing 787. The 777X was launched in November 2013 with two variants: the 777-8 and the 777-9. The 777-8 provides seating for 384 passengers and has a range of 8,730 nmi (16,170 km) while the 777-9 has seating for 426 passengers and a range of over 7,285 nmi (13,500 km). The 777-9 first flew on January 25, 2020, with deliveries expected to commence in late 2023.

Airbus A330neo Wide-body jet airliner developed from Airbus A330

The Airbus A330neo is a wide-body jet airliner developed by Airbus from the Airbus A330. A new version with modern engines comparable to those developed for the Boeing 787 was called for by operators of the original A330 series. It was launched on 14 July 2014 at the Farnborough Airshow, promising 14% better fuel economy per seat. It is exclusively powered by the Rolls-Royce Trent 7000 with double bypass ratio, as opposed to its predecessor.

Alaska Airlines fleet

Alaska Airlines operates a mainline fleet consisting primarily of Boeing 737 series aircraft, with some Airbus A320 family aircraft formerly operated by Virgin America. Regional flights are operated with Alaska branded Bombardier Q400 and Embraer 175 planes by the Alaska-owned regional airline Horizon Air and contractor SkyWest Airlines.



  1. Production of passenger 737NGs ended in December 2019, but 737NGs for military derivatives remain in production. [2]


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