Boeing 737 Classic
|Boeing 737 Classic
|British Airways 737-400|
|Role||Narrow-body jet airliner and Business jet|
|Manufacturer||Boeing Commercial Airplanes|
|First flight||February 24, 1984|
|Introduction||November 28, 1984 with USAir|
|Primary users||Southwest Airlines
|Developed from||Boeing 737|
|Developed into||Boeing 737 Next Generation|
The Boeing 737 Classic is the -300/-400/-500 series of the Boeing 737, so named following the introduction of the -600/-700/-800/-900 series. They are short- to medium-range, narrow-body jet airliners produced by Boeing Commercial Airplanes. The Classic series was introduced as the 'new generation' of the 737. Produced from 1984 to 2000, 1,988 aircraft were delivered.
Development and design
This section requires expansion with: more information about the aircraft's history. (November 2010)
Following the success of the Boeing 737-200 Advanced, Boeing wanted to increase capacity and range, incorporating improvements to upgrade the plane to modern specifications, while also retaining commonality with previous 737 variants. Development began in 1979, and in 1980 preliminary aircraft specifications were released at the Farnborough Airshow. In March 1981, USAir and Southwest Airlines each ordered 10 aircraft, with an option for 20 more.
The new series featured CFM56 turbofan engines, yielding significant gains in fuel economy and a reduction in noise, but also posing an engineering challenge given the low ground clearance of the 737. Boeing and engine supplier CFMI solved the problem by placing the engine ahead of (rather than below) the wing, and by moving engine accessories to the sides (rather than the bottom) of the engine pod, giving the 737 a distinctive non-circular air intake.
The wing incorporated a number of changes for improved aerodynamics. The wing tip was extended 9 inches (23 cm). The leading-edge slats and trailing-edge flaps were adjusted. The flight deck was improved with the optional EFIS (Electronic Flight Instrumentation System), and the passenger cabin incorporated improvements similar to those on the Boeing 757.
The prototype of the -300 rolled out of the Renton plant on January 17, 1984, and first flew on February 24, 1984. After it received its flight certification on November 14, 1984, USAir received the first aircraft on November 28. A very popular aircraft, Boeing received 252 orders for it in 1985, and over 1,000 throughout its production. The 300 series remained in production until 1999 when the last aircraft was delivered to Air New Zealand on December 17, 1999, registration ZK-NGJ.
In December 2008, Southwest Airlines selected Boeing to retrofit the 737-300 with a new set of instruments, hardware and software, to improve commonality with the 737-700, as well as to support the Required Navigation Performance initiative.
The 737-300 can be retrofitted with Aviation Partners Boeing winglets. The 737-300 retrofitted with winglets is designated the -300SP (Special Performance). Used passenger -300 aircraft have also been converted to freighter versions. The 737-300 has been replaced by the 737-700 in the Boeing 737 Next Generation family.
The 737-400 design was launched in 1985 to fill the gap between the 737-300 and the 757-200, and competed with the Airbus A320 and McDonnell Douglas MD-80. It stretched the 737-300 another 10 ft (3.45 m) to carry up to 188 passengers. It included a tail bumper to prevent tailscrapes during take-off (an early issue with the 757), and a strengthened wing spar. The prototype rolled out on January 26, 1988, and flew for the first time on 19 February 1988.
The 737-400F was not a model delivered by Boeing, but a 737-400 converted to freighter. The Boeing 737-400 never included winglets as an option, just like the Boeing 737-600. Alaska Airlines was the first to convert one of their 400s from regular service to an aircraft with the ability to handle ten pallets. The airline has also converted five more into fixed combi aircraft for half passenger and freight. These 737-400 Combi aircraft are now in service.
The 737-400 was replaced by the 737-800 in the Boeing 737 Next Generation family.
The -500 series was offered, due to customer demand, as a modern and direct replacement of the 737-200, incorporating the improvements of the 737 Classic series in a model that allowed longer routes with fewer passengers to be more economical than with the 737-300. The fuselage length of the -500 is 1 ft 7 in (47 cm) longer than the 737-200, accommodating up to 140 passengers. Both glass and older style mechanical cockpits arrangements were available. Using the CFM56-3 engine also gave a 25% increase in fuel efficiency over the older -200s P&W engines.
The 737-500 was launched in 1987, by Southwest Airlines, with an order for 20 aircraft, and flew for the first time on 30 June 1989. A single prototype flew 375 hours for the certification process, and on February 28, 1990 Southwest Airlines received the first delivery. The 737-500 has become a favorite of some Russian airlines, with Nordavia, Rossiya Airlines, S7 Airlines, Sky Express, Transaero, UTair and Yamal Airlines all buying second-hand models of the aircraft to replace aging Soviet-built aircraft and/or expand their fleets. Aerolíneas Argentinas replaced its 737-200s with second-hand 737-500s. The 737-500 is now replaced by the 737-600 in the Boeing 737 Next Generation family. However, unlike the 737-500, the 737-600 has been a slow seller for Boeing since its introduction, with only 69 aircraft delivered.
As the retirement of all 737 Classic models has accelerated, with retirement of 300s and -500s climbing 40% in 2012, the 737-500 has fared worse because of its smaller size. Aircraft older than 21 years old are being retired (vs. at least 24 years old for the 737-300). While a few 737-300s are slated for freighter conversion, there is no demand at all for a -500 freighter conversion.
As of July 2015, 934 Boeing 737 Classic aircraft were in commercial service. This includes 483 -300s, 259 -400s, and 192 -500s.
Many countries operate the 737 passenger and cargo variants in government or military applications.
- Brazil, Chile, Colombia, India (Indian Air Force), Indonesia, Kuwait, Mexico, Niger, Peru, Philippines (Philippine Air Force), South Korea, Republic of China on Taiwan (ROC's Air Force One), Thailand (Royal Thai Air Force), United Arab Emirates, Venezuela.
- The People's Liberation Army Air Force (PLAAF) of the People's Republic of China operates a 737-300 (registered B-4052) as an airborne command post.
- Source: Boeing
Aircraft on display
- N759BA, an ex-China Southern Airlines 737-300 formerly registered B-2921, is on display at the Pima Air & Space Museum in Tucson, Arizona.
- N300SW, Southwest Airlines' first 737-300 delivered in November 1984, is displayed at the Frontiers of Flight Museum at Love Field in Dallas, Texas.
Accidents and incidents
As of September 2015[update], 50 hull losses of Boeing 737 Classic series aircraft have occurred, with a total of 1,174 fatalities. Notable accidents and incidents involving the 737 Classics (-300/-400/-500) include:
- May 24, 1988: TACA Flight 110, en route to New Orleans, suffered double engine failure due to a severe hail storm. The pilot conducted a successful forced landing on a grass levee with no injuries. The aircraft was repaired and returned to service. As a result of this incident, further engine development was carried out to prevent flame-out in severe weather conditions.
- January 8, 1989: Kegworth air disaster: British Midland Flight 92, using a 737-400, crashed outside of East Midlands Airport. Of the eight crew and 118 passengers, 47 passengers died. The left engine had suffered a fan blade fracture and the crew, unfamiliar with the 737-400, shut down the still-functional right engine, causing the aircraft to lose power.
- May 11, 1990: Philippine Airlines Flight 143, using a 737-300 and registered as EI-BZG en route from Ninoy Aquino International Airport in Metro Manila to Iloilo Mandurriao Airport in Iloilo City, the aircraft assigned to the route, suffered an explosion in the central fuel tank while being towed to the runway before take-off and was consumed by fire in about four minutes. Eight passenger fatalities occurred among the 120 passengers and crew on board. The remaining 112 survived.
- February 1, 1991: USAir Flight 1493, operated by a 737-300, collided with a SkyWest Airlines Fairchild Metro III while landing at Los Angeles. All 12 people on the Fairchild Metro died, while 20 passengers and two crew members out of six crew members and 83 passengers died on the 737.
- November 24, 1992: China Southern Airlines Flight 3943, using a 737-300, crashed on descent to Guilin Liangjiang International Airport in Guilin, China, killing 141 occupants on board.
- July 26, 1993: Asiana Airlines Flight 733, using a 737-500, crashed into a mountain, killing 68 of 110 occupants.
- September 8, 1994: USAir Flight 427, using a 737-300 with 127 passengers and five crew members, lost control after a rudder malfunction and crashed outside of Pittsburgh International Airport, killing everyone on board. The cause was determined to be the same as that which caused the crash of United Airlines Flight 585, a 737-291 that crashed on March 3, 1991.
- December 29, 1994: Turkish Airlines Flight 278, using a 737-400, registration TC-JES and named Mersin en route from Esenboğa International Airport in Ankara, Turkey, crashed while attempting to land at Van Ferit Melen Airport in Van, in eastern Turkey. Five of the seven crew and 52 of the 69 passengers lost their lives, while two crew members and 17 passengers survived with serious injuries.
- May 8, 1997: China Southern Airlines Flight 3456, using a 737-300, crashed while landing at Shenzhen, killing 35 of 65 passengers and two of nine crew members.
- December 19, 1997: SilkAir Flight 185, using a 737-300 with 97 passengers and seven crew members, crashed into a river in Indonesia, killing everyone on board. The exact cause of the crash could not be determined.
- September 16, 1998: Continental Airlines Flight 475, using a 737-500, received wind-shear while landing at Guadalajara, Mexico. None of the passengers and crew received injuries. The aircraft was written off.
- April 7, 1999: Turkish Airlines Flight 5904, using a 737-400 with six crew members, crashed in Turkey. All of the crew on board died; no passengers flew on that flight.
- March 5, 2000: Southwest Airlines Flight 1455, using a 737-300, overran the runway upon landing at Burbank, California, narrowly missing a gas station. All of the passengers and crew survived.
- March 3, 2001: Thai Airways International Flight 114, a 737-400 bound for Chiang Mai from Bangkok, was destroyed by an explosion of the center wing tank resulting from ignition of the flammable fuel/air mixture in the tank. The source of the ignition energy for the explosion could not be determined with certainty, but the most likely source was an explosion originating at the center wing tank pump as a result of running the pump in the presence of metal shavings and a fuel/air mixture. One flight attendant died.
- May 7, 2002: EgyptAir Flight 843, using a 737-500, crashed during approach to Tunis, Tunisia. Three of six crew members and 11 of 56 passengers died.
- January 3, 2004: Flash Airlines Flight 604, using a 737-300 with 135 passengers and 13 crew members, crashed into the Red Sea, killing everyone on board, making it the deadliest involving the Boeing 737 Classic.
- June 9, 2005: 2005 Logan Airport runway incursion – A 737-300 operated by US Airways as US Airways Flight 1170 avoided collision with an Aer Lingus Airbus A330 at Logan Airport in Boston, Massachusetts.
- August 14, 2005: Helios Airways Flight 522, using a 737-300, suffered a gradual decompression which incapacitated five of the six crew members and all 115 passengers. The plane circled in the vicinity of Athens International Airport on its pre-programmed flight plan before running out of fuel and crashing near Grammatiko, killing everyone on board.
- January 23, 2006: A Boeing 737-500 operated by Continental Airlines was set to depart from El Paso International Airport for George Bush Intercontinental Airport, when one of the engines suffered an oil leak. The plane's captain accidentally spun up the affected engine while a mechanic was still inspecting it, resulting in the engine ingesting and killing the man instantly.
- June 15, 2006: TNT Airways Flight 352, using a 737-300 Freighter and operating from Liège Airport in Belgium to London Stansted Airport in the UK had to divert to East Midlands Airport due to bad weather. On final approach, the autopilot was disengaged for a short period. The aircraft touched down off the runway to the left, resulting in the right main landing gear being detached and the right wing tip and engine scraping the ground. The pilots managed to lift off again and subsequently made an emergency diversion to Birmingham International Airport, where a landing was performed on the remaining two landing gear, during which the aircraft scraped on its nose and right engine. There were no injuries. The cause of the crash was determined to be a poorly timed message from local air traffic control which the pilot misinterpreted, causing him to descend too quickly. The team of pilots were said by the airline to have managed the situation with skill once the error had been detected, but were dismissed from service with the company as a result of the incident.
- October 3, 2006: Turkish Airlines Flight 1476, using a 737-400, was hijacked by Hakan Ekinci in Greek airspace. All 107 passengers and six crew members on board survived. The aircraft landed safely at Brindisi Airport in Italy.
- January 1, 2007: Adam Air Flight 574, using a 737-400 with 96 passengers and six crew members, crashed off the coast of Sulawesi. The occupants were never found, and were presumed dead.
- February 21, 2007: Adam Air Flight 172, using a 737-300, suffered a structural failure when landing at Juanda International Airport. All of the passengers and crew survived.
- March 7, 2007: Garuda Indonesia Flight 200, using a 737-400, crashed upon landing at Adisucipto International Airport. Of 133 passengers and seven crew members, 20 passengers and one crew member died.
- September 14, 2008: Aeroflot Flight 821, using an Aeroflot-Nord-operated 737-500, crashed shortly before its scheduled arrival at Perm, Russia. All 82 passengers and six crew members were killed.
- December 20, 2008: Continental Airlines Flight 1404, a 737-500, veered off the runway and caught fire at Denver International Airport during an attempted departure. There were no casualties.
- July 13, 2009: Southwest Airlines Flight 2294, while airborne, had an American football-shaped hole appear and made an emergency landing at Charleston, WV. All 131 onboard survived.
- January 16, 2010: A UTair Aviation Boeing 737-500, VQ-BAC, departed the runway on landing at Vnukovo International Airport and was substantially damaged when the nosewheel collapsed.
- April 13, 2010: Merpati Nusantara Airlines Flight 836, using 737-300 PK-MDE, overran the runway at Rendani Airport, Manokwari, Indonesia and broke into two pieces. All 103 passengers and six crew escaped alive.
- November 2, 2010: Lion Air Flight 712, using Boeing 737-400 PK-LIQ, overran the runway on landing at Supadio Airport, Pontianak, coming to rest on its belly. All 174 passengers and crew evacuated by the emergency chutes, with few injuries reported.
- April 1, 2011: Southwest Airlines Flight 812 had a six-foot tear in the upper fuselage on a flight from Phoenix Sky Harbor Airport to Sacramento International Airport, and diverted to Yuma after an emergency descent. One minor injury was reported.
- November 17, 2013: Tatarstan Airlines Flight 363, a 737-500, crashed near Kazan International Airport, Russia, en route from Moscow, killing all 44 passengers and six crew on board.
- May 8, 2014: Ariana Afghan Airlines Flight FG-312, a 737-400, overran the runway at Kabul International Airport after a flight from Delhi. None of the five crew or 125 passengers was injured. The aircraft was substantially damaged.
- June 5, 2015: Aero contractors Boeing 737-500 En Route from the Domestic wing of Murtala Mohammed Airport, Ikeja, Lagos to Kaduna. 20 minutes after takeoff the aircraft lost altitude, depressurization in the aircraft cabin leading to the dropping of the oxygen masks. After an hour of wobbling in the air the Boeing 737 was diverted to Abuja, despite the landing gear failing initially the aircraft landed safely at Abuja.
- November 22, 2015: Avia Traffic Company Flight 768, a Boeing 737-300 registration EX-37005, touched down hard at Osh Airport injuring 8, and causing all the landing gear to be ripped off. The aircraft skidded off the runway and the left engine was torn from its mounting.
|Seating capacity||149 (1-class, dense)
140 (1-class, typical)
128 (2-class, typical)
|188 (1-class, maximum)
159 (1-class, typical)
146 (2-class, typical)
|140 (1-class, max)
122 (1-class, typical)
108 (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)
|Seat width||17.2 in (44 cm) (1-class, 6 abreast seating)|
|Overall length||33.4 m
(109 ft 7 in)
(119 ft 6 in)
(101 ft 8 in)
(94 ft 9 in)
|Overall height||11.13 m
(36 ft 6 in)
(36 ft 5 in)
|Fuselage width||3.76 m (12 ft 4 in)|
|Fuselage height||4.01 m (13' 2")|
|Cabin width||3.54 m (11 ft 7 in)|
|Cabin height||2.20 m (7 ft 3 in)|
|Operating empty weight, typical||32,700 kg
|Maximum Takeoff Weight||62,820 kg
|Maximum landing weight||51,700 kg
|Maximum zero-fuel weight||48,410 kg
|Cargo capacity||23.3 m³
|Takeoff field length (MTOW, SL, ISA)||2,300 m (7,546 ft)||2,540 m (8,483 ft)||2,470 m (8,249 ft)|
|Service ceiling||37,000 ft|
|Cruising speed (Mach)||0.74|
|Maximum speed (Mach)||0.82|
|Range fully loaded||4,204 km (2,270 NM)||4,204 km (2,270 NM)||4,444 km (2,402 NM)|
|Maximum fuel capacity||23,170 L
|Engine manufacturer||CFM International|
|Engine type (x2)||CFM56-3B-1||CFM56-3B-2||CFM56-3B-1|
|Takeoff thrust||90 kN (20,000 lbf)||98 kN (22,000 lbf)||90 kN (20,000 lbf)|
|Cruising thrust||21,810 N (4,902 lbf)||21,900 N (4,930 lbf)||21,810 N (4,902 lbf)|
|Fan tip diameter||1.52 m (60 in)|
|Engine bypass ratio||5.0:1||4.9:1||5.0:1|
|Engine length||2.36 m (93 in)|
|Engine weight (dry)||1,950 kg (4,301 lb)|
|Engine ground clearance||46 cm (18 in)|
- Related development
- Aircraft of comparable role, configuration and era
- Related lists
- Endres, 2001, p. 129.
- Shaw, 1999, pg. 7.
- Endres, 2001, p.126.
- Endres, 2001, p.128.
- Shaw, 1999, p. 10.
- Shaw, 1999, p.7.
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- FAA Type Certificate Data Sheet http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/9dd07e4b4293722e86257dfc006774ca/$FILE/A16WE_Rev_54.pdf
- Shaw, 1999, pg. 13.
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- "ASN Aircraft accident Boeing 737-566 SU-GBI Tunis-Carthage Airport (TUN)". Aviation-safety.net. Retrieved 2011-03-20.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
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|Boeing 737 Original||Boeing 737 Classic||Boeing 737 NG||Boeing 737 MAX|
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