Editing ARTICLE

{{Infobox Aircraft
| name = Boeing 737 Family
| image = [[File:Boeing_737_Series_Comparison.jpg|300px]]
| caption = Comparison of Boeing 737 models (from top: Original, Classic, NG, and MAX)
| manufacturer = [[Boeing Commercial Airplanes]]
| designer = 
| first flight = April 9, 1967 (737-100)
| introduction = February 10, 1968 with [[Lufthansa]]
| status = In service
| primary users = [[Southwest Airlines]]<br>[[Ryanair]]<br>[[United Airlines]]<br>[[American Airlines]]
| produced = 1966–present
| number built = Over 11,000 (as of 2023)
| unit cost = 737-700: $89.1–99.7 million (2023)<br>737 MAX 7: $99.7–110 million (2023)
| variants = [[Boeing Business Jet]]<br>[[Boeing 737 AEW&C]]<br>[[P-8 Poseidon]]
}}

The '''Boeing 737''' is a narrow-body aircraft family produced by [[Boeing]] at its [[Renton, Washington]] factory. First introduced in 1968, it has become the best-selling commercial jetliner in aviation history. The 737 family has undergone four generations of development: the Original (-100/-200), Classic (-300/-400/-500), Next Generation (-600/-700/-800/-900), and MAX (7/8/9/10) series.

== Development History ==

=== Original Series (1967–1988) ===
The 737 was conceived as a shorter, lower-cost twinjet to complement Boeing's 707 and 727. The initial -100 model (first flight April 9, 1967) was followed by the lengthened -200, which became more popular. Key features included:
* Pratt & Whitney JT8D low-bypass turbofan engines
* Capacity for 85–124 passengers
* Mechanical flight controls

=== Classic Series (1984–2000) ===
The 737-300/-400/-500 series introduced:
* CFM International CFM56 high-bypass turbofans
* Glass cockpit with EFIS displays
* Increased passenger capacity (up to 168)
* Improved aerodynamics and fuel efficiency

=== Next Generation (NG, 1997–2020) ===
The 737NG series represented a major redesign:
* New wing with increased span and area
* Modern avionics including LCD displays
* Revised interior with Boeing Sky Interior option
* Winglets as standard on most models
* Variants from 110 seats (-600) to 215 seats (-900ER)

=== MAX Series (2017–present) ===
The current generation features:
* CFM International LEAP-1B engines
* Advanced Technology winglets
* Boeing Sky Interior as standard
* MCAS (Maneuvering Characteristics Augmentation System)
* 12–14% better fuel efficiency than NG

== Design ==

=== Common Features ===
All 737 variants share key design elements:
* Low-wing cantilever monoplane
* Six-abreast economy seating (3+3)
* Two underwing-mounted turbofan engines
* Tricycle landing gear with main gear retracting into fuselage
* Semi-monocoque aluminum fuselage (composite materials in MAX)

=== Flight Deck ===
The 737 flight deck has evolved through generations:
* Original: Analog gauges with three-crew operation
* Classic: Transition to two-crew glass cockpit
* NG: Six LCD displays with integrated avionics
* MAX: Large format displays with optional HUD

== Variants ==
{| class="wikitable"
! Generation !! Model !! Length !! Seats !! Range !! Introduced
|-
| Original || 737-100 || 28.6 m || 85 || 3,440 km || 1968
|-
| Original || 737-200 || 30.5 m || 102 || 4,440 km || 1968
|-
| Classic || 737-300 || 33.4 m || 126 || 4,204 km || 1984
|-
| Classic || 737-400 || 36.5 m || 147 || 4,204 km || 1988
|-
| Classic || 737-500 || 31.0 m || 110 || 4,444 km || 1990
|-
| NG || 737-600 || 31.2 m || 110 || 5,648 km || 1998
|-
| NG || 737-700 || 33.6 m || 126 || 6,230 km || 1998
|-
| NG || 737-800 || 39.5 m || 162 || 5,765 km || 1998
|-
| NG || 737-900ER || 42.1 m || 180 || 5,925 km || 2007
|-
| MAX || 737 MAX 7 || 35.6 m || 138 || 7,130 km || 2019
|-
| MAX || 737 MAX 8 || 39.5 m || 178 || 6,570 km || 2017
|-
| MAX || 737 MAX 9 || 42.2 m || 193 || 6,570 km || 2018
|-
| MAX || 737 MAX 10 || 43.8 m || 204 || 6,110 km || 2023
|}

== Operational History ==
The 737 family has been operated by over 500 airlines worldwide. Notable aspects include:
* Over 30 billion passengers carried
* More than 300 aircraft in the air at any given time
* Average of one 737 taking off or landing every 5 seconds
* Primary workhorse for low-cost carriers globally

== Accidents and Incidents ==
The 737 family has been involved in several notable accidents:
* 737 MAX grounding (2019–2020) following two fatal crashes
* 2006 Gol Transportes Aéreos Flight 1907 mid-air collision
* 2010 Air India Express Flight 812 overshoot accident
* 2018 Southwest Airlines Flight 1380 engine failure

== Specifications (737 MAX 8) ==
{{Aircraft specs
|ref=Boeing specifications
|prime units?=met
|crew=2
|capacity=178 passengers (max)
|length m=39.5
|span m=35.9
|height m=12.3
|wing area sqm=127
|empty weight kg=45,070
|max takeoff weight kg=82,191
|fuel capacity=25,816 L
|engines=2 × CFM International LEAP-1B
|cruise speed kmh=839
|range km=6,570
|ceiling m=12,500
}}

== See Also ==
* [[Airbus A320 family]] - main competitor
* [[Boeing 707]] - predecessor
* [[Boeing 757]] - stretched narrow-body successor
* [[List of Boeing 737 operators]]

== References ==
{{Reflist}}

== External Links ==
* [https://www.boeing.com/commercial/737max/ Boeing 737 MAX official page]
* [https://www.boeing.com/history/products/737.page Boeing 737 history]

[[Category:Boeing aircraft|737]]
[[Category:Narrow-body airliners]]
[[Category:Twinjets]]
[[Category:Aircraft first flown in 1967]]