• Does Mac Move The Manual Trim Wheel Move On The 737 Max Review
• Does Mac Move The Manual Trim Wheel Move On The 737 Max Youtube

This is a manual way of trimming and is normally not used. The main electric trim is the second way in which the stabilizer is moved. The main electric trim is operated through two switches that can be moved up and down on the control wheel. The trim switches move the trim wheel and uses the same system as the stabilizer trim. On Sunday I was scheduled to fly on three of the very first Southwest revenue flights utilizing the airline’s brand new 737 MAX 8. Unfortunately only one of the flights took place, as a technical issue prevented the plane from departing Houston Hobby (HOU) on its second flight. Boeing finally presented the 737 MAX 10 at the ISTAT 2017 US conference in San Diego last week. The company put forward several claims in the presentation. The MAX 10 would fly about the same number of passengers farther and cheaper than the Airbus A321neo, officials said (Figure 1).

The Boeing 737 MAX is a narrow-body aircraft series designed and produced by Boeing Commercial Airplanes as the fourth generation of the Boeing 737, succeeding the Boeing 737 Next Generation (NG).

This 737 series was publicly announced on August 30, 2011.^[8] The first 737 MAX airplane, named The Spirit of Renton, performed its first flight on January 29, 2016.^[1] The 737 MAX series gained FAA certification on March 8, 2017.^[9][10] The first delivery was a MAX 8 on May 6, 2017, to Malindo Air,^[11] which placed the aircraft into service on May 22, 2017.^[2] The 737 MAX is based on earlier 737 designs, re-engined with more efficient CFM International LEAP-1B engines, aerodynamic changes (including distinctive split-tip winglets), and airframe modifications.^[10]

The 737 MAX series has been offered in four variants, typically offering 138 to 230 seats and a 3,215 to 3,825 nmi (5,954 to 7,084 km) range. The 737 MAX 7, MAX 8 (including the denser, 200–seat MAX 200), and MAX 9 are intended to replace the 737-700, -800, and -900, respectively.^[10] Additional length is offered with the further stretched 737 MAX 10. As of June 2019, the Boeing 737 MAX has received 4,934 firm orders and delivered 387 aircraft.^[12]

After two fatal crashes of MAX 8 aircraft in October 2018 and March 2019, regulatory authorities around the world grounded the aircraft series until further notice.^[3] On March 19, 2019, the United States Department of Transportation requested an audit of the regulatory process that led to the aircraft's certification in 2017.^[13][14]

• 1Development
• 2Design
• 3Variants
  • 3.2737 MAX 8
• 5Accidents and incidents

Development[edit]

Background[edit]

In 2006, Boeing started considering the replacement of the 737 with a 'clean-sheet' design that could follow the Boeing 787 Dreamliner.^[15] In June 2010, a decision on this replacement was postponed into 2011.^[16]

On December 1, 2010, Boeing's competitor, Airbus, launched the Airbus A320neo family to improve fuel burn and operating efficiency with new engines: the CFM International LEAP and Pratt & Whitney PW1000G.^[17] In February 2011, Boeing's CEO Jim McNerney maintained 'We're going to do a new airplane.'^[18] At the March 2011 ISTAT conference, BCA President James Albaugh was not sure about a 737 re-engine, like Boeing CFO James A. Bell stated at the JP Morgan Aviation, Transportation and Defense conference the same month.^[19] The A320neo gathered 667 commitments at the June 2011 Paris Air Show for a backlog of 1,029 units since its launch, setting an order record for a new commercial airliner.^[20]

On July 20, 2011, American Airlines announced an order for 460 narrowbody jets including 130 A320ceos and 130 A320neos, and intended to order 100 re-engined 737s with CFM LEAPs, pending Boeing confirmation.^[21] The order broke Boeing's monopoly with the airline and forced Boeing into a re-engined 737.^[22] As this sale included a Most-Favoured-Customer Clause, Airbus has to refund any difference to American if it sells to another airline at a lower price, so the European manufacturer cannot give a competitive price to competitor United Airlines, leaving it to a Boeing-skewed fleet.^[23]

Program launch[edit]

On August 30, 2011, Boeing's board of directors approved the launch of the re-engined 737, expecting a fuel burn 4% lower than the A320neo.^[8] Studies for additional drag reduction were performed during 2011, including revised tail cone, natural laminar flow nacelle, and hybrid laminar flow vertical stabilizer.^[24] Boeing abandoned the development of a new design.^[25] Boeing expected the 737 MAX to meet or exceed the range of the Airbus A320neo.^[26] Firm configuration for the 737 MAX was scheduled for 2013.^[27]

In March 2010, the estimated cost to re-engine the 737 according to Mike Bair, Boeing Commercial Airplanes' vice president of business strategy & marketing, would be $2–3 billion including the CFM engine development. During Boeing's Q2 2011 earnings call, former CFO James Bell said the development cost for the airframe only would be 10–15% of the cost of a new program estimated at $10–12 billion at the time. Bernstein Research predicted in January 2012 that this cost would be twice that of the Airbus A320neo.^[6]

Fuel consumption is reduced by 14% from the 737NG.^[28] In November 2014, Boeing Chief Executive Officer Jim McNerney said the 737 will be replaced by a new airplane by 2030, slightly bigger and with new engines but keeping its general configuration, probably a composite airplane.^[29]

Production[edit]

On August 13, 2015, the first 737 MAX fuselage completed assembly at Spirit Aerosystems in Wichita, Kansas, for a test aircraft that would eventually be delivered to launch customer Southwest Airlines.^[30] On December 8, 2015, the first 737 MAX—a MAX 8 named Spirit of Renton—was rolled out at the Boeing Renton Factory.^[31][32]

Because GKN could not produce the titaniumhoneycomb inner walls for the thrust reversers quickly enough, Boeing switched to a composite part produced by Spirit to deliver 47 MAXs per month in 2017. Spirit supplies 69% of the 737 airframe, including the fuselage, thrust reverser, engine pylons, nacelles, and wing leading edges.^[33]

A new spar-assembly line with robotic drilling machines should increase throughput by 33%. The Electroimpact automated panel assembly line sped up the wing lower-skin assembly by 35%.^[34] Boeing planned to increase its 737 MAX monthly production rate from 42 planes in 2017 to 57 planes by 2019.^[35]

The rate increase strained the production and by August 2018, over 40 unfinished jets were parked in Renton, awaiting parts or engine installation, as CFM engines and Spirit fuselages were delivered late.^[36] After parked airplanes peaked at 53 at the beginning of September, Boeing reduced this by nine the following month, as deliveries rose to 61 from 29 in July and 48 in August.^[37]

In collaboration with Commercial Aircraft Corporation of China Ltd., Boeing has built a completion and delivery facility for the 737 MAX in Zhoushan, China.^[38][39] This facility initially handles interior finishing only, but will subsequently be expanded to include paintwork. The first aircraft was delivered from the facility to Air China on December 15, 2018.^[40]

From mid-April 2019, the company announced it was temporarily cutting production of the 737 aircraft from 52 per month to 42 amid the Boeing 737 MAX groundings.^[41]Production of the LEAP-1B engine will continue at an unchanged rate, enabling CFM to catch up its backlog within a few weeks.^[42]

Flight testing and certification[edit]

The first flight took place on January 29, 2016, at Renton Municipal Airport^[43]—nearly 49 years after the maiden flight of the 737, a 737-100, on April 9, 1967.^[1] The first MAX 8, 1A001, was used for aerodynamic trials: flutter testing, stability and control, and takeoff performance-data verification, before it was modified for an operator and delivered. 1A002 was used for performance and engine testing: climb and landing performance, crosswind, noise, cold weather, high altitude, fuel burn and water-ingestion. Aircraft systems including autoland were tested with 1A003. 1A004, with an airliner layout, flew function-and-reliability certification for 300h with a light flight-test instrumentation.^[44]

The 737 MAX gained Federal Aviation Administration (FAA) certification on March 8, 2017.^[9] It was approved by the EASA on March 27, 2017.^[45] After completing 2,000 test flight hours and 180-minute ETOPS testing requiring 3,000 simulated flight cycles in April 2017, CFM International notified Boeing of a possible manufacturing quality issue with low pressure turbine (LPT) discs in LEAP-1B engines.^[46] Boeing suspended 737 MAX flights on May 4,^[11] and resumed flights on May 12.^[47]

During the certification process, the FAA delegated many evaluations to Boeing, allowing the manufacturer to review their own product.^[48][49] It was widely reported that Boeing pushed to expedite approval of the 737 MAX to compete with the Airbus A320neo. That aircraft hit the market nine months ahead of Boeing's model.^[50]

Introduction[edit]

The first delivery was a MAX 8, handed over to Malindo Air (a subsidiary of Lion Air) on May 16, 2017; it entered service on May 22.^[2]Norwegian Air subsidiary Norwegian Air International was the second airline to put a 737 MAX into service, when it performed its first transatlantic flight with a MAX 8 named Sir Freddie Laker on July 15, 2017 between Edinburgh Airport in Scotland and Bradley International Airport in the US state of Connecticut, followed by a second rotation from Edinburgh to Stewart Airport, New York.^[51]

Boeing aimed to match the 99.7% dispatch reliability of the 737 Next Generation (NG).^[52] Southwest Airlines, the launch customer, took delivery of its first 737 MAX on August 29, 2017.^[53] Boeing planned to deliver at least 50 to 75 aircraft in 2017, 10–15% of the more than 500 737s to be delivered in the year.^[11]

After one year of service, 130 MAXs had been delivered to 28 customers, logging over 41,000flights in 118,000hours and flying over 6.5million passengers. flydubai observed 15% more efficiency than the NG, more than the 14% promised, and dependability reached 99.4%. Long routes include 24 over 2,500 nmi (4,630 km), including a daily Aerolineas Argentinas service from Buenos Aires to Punta Cana over 3,252 nmi (6,023 km).^[54]

Worldwide grounding[edit]

By March 2019, the 737 MAX had been involved in two fatal accidents within five months, raising safety concerns and prompting airline users and regulators around the world to ground the aircraft. In both accidents, attention focused on the 737 MAX's new Maneuvering Characteristics Augmentation System (MCAS), which can automatically lower the aircraft nose when a sensor indicates that a stall may be imminent. Satellite tracking data showed that after takeoff, both aircraft experienced extreme fluctuations in vertical speed.^[55] Pilots in both aircraft radioed they had flight control problems and wanted to return to the airport.^[56][57]

After Indonesian investigators of the first 737 MAX 8 crash on October 29, 2018 issued their preliminary report in late November 2018, Boeing began developing and evaluating a software fix to the MCAS that is subject to review by a panel of global aviation regulators.^[58]. Although Boeing was working on a fix, the plane continued to fly, and Boeing and the FAA advocated it continue flying even after the second crash and in the face of worldwide airline groundings, until all data was received. ^[59] Airline users of the 737 MAX announced daily flight cancellations expected to extend through August 2019, later extended to November.^[60] Boeing Chief Executive Dennis Muilenburg said in June 2019 that the planes would get a green light to fly again by the end of the year but declined to provide a timeline.^[61] In late June 2019, the FAA discovered a new issue in the flight control system, resulting in expectations of further delays.^[62]

Design[edit]

In mid-2011, the objective was to match the A320neo's 15% fuel burn advantage, but the initial reduction was 10–12%; it was later enhanced to 14.5%: the fan was widened from 61 in (150 cm) to 69.4 in (176 cm) by raising the nose gear and placing the engine higher and forward, the split winglet added 1–1.5%, a re-lofted tail cone 1% more and electronically controlling the bleed air system improved efficiency. The new engine casings included chevrons similar to the 787 to help reduce engine noise.^[63]

Aerodynamic changes[edit]

The split tip wingtip device is designed to maximize lift while staying in the same ICAO Aerodrome Reference Code letter C gates as current 737s. It traces its design to the McDonnell Douglas MD-12 1990s twin-deck concept, proposed for similar gate restrictions before the Boeing merger.^[64] A MAX 8 with 162 passengers on a 3,000 nmi (5,600 km) mission will have up to a 1.8% better fuel burn than a blended-winglet-equipped aircraft and 1% over 500 nmi (930 km) at Mach 0.79.^[64]

The new winglet is 9 ft 6 in (2.90 m) high.^[34] Other improvements include a re-contoured tail cone, revised auxiliary power unit inlet and exhaust, aft-body vortex generators removal and other small aerodynamic improvements.^[28]Aviation Partners offers a similar 'Split-Tip Scimitar' winglet for previous 737NGs.^[65] It resembles a three-way hybrid between a blended winglet, wingtip fence, and raked wingtip.

Structural and other changes[edit]

The 8 in (20 cm) taller nose-gear strut keeps the same 17-inch (43 cm) ground clearance of the engine nacelles.^[28] New struts and nacelles for the heavier engines add bulk, the main landing gear and supporting structure are beefier, and fuselage skins are thicker in some places for a 6,500 lb (2,900 kg) increase to the MAX 8's empty aircraft weight.^[28] To preserve fuel and payload capacity, its maximum takeoff weight is 7,000 lb (3,200 kg) heavier.^[28]

Rockwell Collins will supply four 15.1-inch (380 mm) landscape liquid crystal displays (LCD), as used on the 787 Dreamliner, to improve pilots' situation awareness and efficiency.^[66] Boeing plans no major modifications for the 737 MAX flight deck, as it wants to maintain commonality with the 737 Next Generation family. Boeing Commercial Airplanes CEO Jim Albaugh said in 2011 that adding more fly-by-wire control systems would be 'very minimal'.^[67] Most of the systems are carried from the 737NG for a short differences-training course to upgrade flight crews.^[28]

The 737 MAX extended spoilers are fly-by-wire controlled.^[34] As production standard, the 737 MAX will feature the Boeing Sky Interior with overhead bins and LED lighting based on the Boeing 787's interior.^[68]

Engines[edit]

In 2011, the Leap-1B was initially 10–12% more efficient than the previous 156 cm (61 in) CFM56-7B of the 737NG.^[69] The 18-blade, woven carbon-fiber fan enables a 9:1 bypass ratio (up from 5.1:1 with the previous 24-blade titanium fan) for a 40% smaller noise footprint.^[28] The CFM56 bypass ranges from 5.1:1 to 5.5:1.^[70] The two-shaft design has a low-pressure section comprising the fan and three booster stages driven by five axial turbine stages and a high-pressure section with a 10-stage axial compressor driven by a two-stage turbine.^[28] The 41:1 overall pressure ratio, increased from 28:1, and advanced hot-section materials enabling higher operating temperatures permit a 15% reduction in thrust specific fuel consumption (TSFC) along with 20% lower carbon emissions, 50% lower nitrogen-oxide emissions, though each engine weighs 849 lb (385 kg) more at 6,129 lb (2,780 kg).^[28]

In August 2011, Boeing had to choose between 66 in (168 cm) or 68 in (173 cm) fan diameters necessitating landing gear changes to maintain a 17-inch (43 cm) ground clearance beneath the new engines; Boeing Commercial Airplanes chief executive officer Jim Albaugh stated 'with a bigger fan you get more efficiency because of the bypass ratio [but also] more weight and more drag', with more airframe changes.^[71] The smaller Leap-1B engine will weigh less and have a lower frontal area but a lower bypass ratio leading to a higher thrust specific fuel consumption than the 78 in (200 cm) Leap-1A of the A320neo.^{[citation needed]}

In November 2011, Boeing selected the larger fan diameter, necessitating a 6–8 in (150–200 mm) longer nose landing gear.^[72][73] In May 2012, Boeing further enlarged the fan to 69.4 in (176 cm), paired with a smaller engine core within minor design changes before the mid-2013 final configuration.^[74][75]

The nacelle features chevrons for noise reduction like the 787.^[76] A new bleed air digital regulator will improve its reliability.^[77] The new nacelles being larger and more forward possess aerodynamic properties which act to further increase the pitch rate.^[78] The larger engine is cantilevered ahead of and slightly above the wing, and the laminar flow engine nacelle lipskin is a GKN Aerospace one-piece, spun-formed aluminum sheet inspired by the 787.^[34]

To mitigate the pitch-up tendency of the new flight geometry from the engines being located further forward and higher than previous engines, Boeing added the new Maneuvering Characteristics Augmentation System.^[79]

Maneuvering Characteristics Augmentation System (MCAS)[edit]

The Maneuvering Characteristics Augmentation System (MCAS) is a flight control software system developed for the Boeing 737 MAX to provide handling qualities similar to the Boeing 737 NG, especially in low-speed and high angle of attack (AoA) flight. It lowers the nose without pilot action when it determines the aircraft is too nose-high, based on input from airspeed, altitude and angle of attack sensors. However, it is susceptible to erroneous activation, as evidenced in the deadly crashes of Lion Air Flight 610 and Ethiopian Airlines Flight 302. The 737 MAX is indefinitely grounded until regulators decide the aircraft is airworthy, pending software and instrumentation updates and revisions to information for flight crews. They may also be required to undergo MCAS training sessions in flight simulators.

Variants[edit]

The 737-700, -800 and -900ER, the most widespread versions of the previous 737NG,^[12] are replaced by the 737 MAX 7, MAX 8 and MAX 9, respectively^[80] (FAA type certificate: 737-7, -8, and -9^[9]). The 737 MAX 8 entered service in May 2017,^[2] and the MAX 9 entered service in March 2018.^[81] The MAX 7 and MAX 200 (a higher density version of the MAX 8) are expected to enter service in 2019,^[82][83] and the MAX 10 in 2020.^[84]

In February 2018, Boeing forecast that 60–65% of demand for the airliner would be for the 737 MAX 8 variant, 20–25% for the MAX 9 and MAX 10, and 10% for the MAX 7.^[85]

737 MAX 7[edit]

Originally based on the 737-700, Boeing announced the redesign of the MAX 7 derived from the MAX 8 at the July 2016 Farnborough Air Show, accommodating two more seat rows than the 737-700 for 138 seats, up 12 seats.^[86][87] The redesign uses the 737-8 wing and landing gear; a pair of over-wing exits rather than the single-door configuration; a 46-inch longer aft fuselage and a 30-inch longer forward fuselage; structural re-gauging and strengthening; and systems and interior modifications to accommodate the longer length.^[88] It is to fly 1,000 nmi (1,900 km) farther than the -700 with 18% lower fuel costs per seat. Boeing predicts the MAX 7 to carry 12 more passengers 400 nmi (740 km) farther than A319neo with 7% lower operating costs per seat.^[89] Boeing plans to improve its range from 3,850 nmi (4,430 mi; 7,130 km) to 3,915 nmi (4,505 mi; 7,251 km) after 2021.^[90]

Production on the first 65-foot-long (20 m) wing spar for the 737-7 began in October 2017.^[84] Assembly of the first flight-test aircraft began on November 22, 2017^[91] and was rolled out of the factory on February 5, 2018.^[92] The MAX 7 took off for its first flight on March 16, 2018 from the factory in Renton, Washington and flew for three hours over Washington state.^[93] It reached 250 kn (460 km/h) and 25,000 ft (7,600 m), performed a low approach, systems checks and an inflight engine restart, and landed in Moses Lake, Washington, Boeing's flight test center.^[94]

Entry into service with launch operator Southwest Airlines was expected in January 2019,^[84] but the airline deferred these orders until 2023-2024.^[95]WestJet also converted its order for MAX 7s, originally due for delivery in 2019, into MAX 8s and is not expected to take any MAX 7s until at least 2021.^[96] Customers for the aircraft include Southwest Airlines (30), WestJet (23), Canada Jetlines (5) and ILFC Aviation (5).^[12] The MAX 7 seems to have fewer than 100 orders among over 4,300 MAX total sales.^[89]

737 MAX 8[edit]

The first variant developed in the 737 MAX series, the MAX 8 replaces the 737-800 with a longer fuselage than the MAX 7. Boeing plans to improve its range from 3,515 nmi (4,045 mi; 6,510 km) to 3,610 nmi (4,150 mi; 6,690 km) after 2021.^[90] On July 23, 2013, Boeing completed the firm configuration for the 737 MAX 8.^[97] The MAX 8 has a lower empty weight and higher maximum takeoff weight than the A320neo and in cruise at 140,500 lb (63,700 kg), it burns 4,460 lb (2,020 kg) per hour at Mach 0.78 (450 kn; 833 km/h) and FL350, at a sub-optimal flight level and forward center of mass.^[28]

The Boeing 737 MAX 8 completed its first flight testing in La Paz, Bolivia. The 13,300-foot altitude at El Alto International Airport tested the MAX's capability to take off and land at high altitudes.^[98] Its first commercial flight was operated by Malindo Air on May 22, 2017 between Kuala Lumpur and Singapore as Flight OD803.^[2]In early 2017, a new -8 was valued at $52.85million, rising to below $54.5million by mid2018.^[99]

737 MAX 200[edit]

In September 2014, Boeing launched a high-density version of the 737 MAX 8, the 737 MAX 200, named for seating for up to 200 passengers in a single-class high-density configuration with slimline seats; an extra pair of exit doors is required because of the higher passenger capacity. Boeing states that this version will be 20% more cost efficient per seat than current 737 models, and will be the most efficient narrow-body on the market when delivered, including 5% lower operating costs than the 737 MAX 8.^[100][101] Three of eight galley trolleys are removed to accommodate more passenger space.^[102] An order with Ryanair for 100 aircraft was finalized in December 2014.^[103] The variant is officially designated 737-8200.^[104]

In mid-November 2018, the first of the 135 ordered by Ryanair rolled out, in a 197-seat configuration.^[105] It was first flown from Renton on January 13, 2019,^[106] and was due to enter service in April 2019, with four further MAX 200s expected later in 2019,^[107] though these deliveries were deferred while the MAX is grounded; Ryanair has stated that it intends to place a further order once flights resume.^[108]

Proposed 737-8ERX[edit]

Airlines have been shown a 737-8ERX concept based on the 737 MAX 8 with a higher 194,700 lb (88.3 t) maximum take-off weight using wings, landing gear and central section from the MAX 9 to provide a longer range of 4,000 nautical miles (4,600 mi; 7,400 km) with seating for 150, closer to the Airbus A321LR.^[109]

737 MAX 9[edit]

The 737 MAX 9 will replace the 737-900 and has a longer fuselage than the MAX 8. Boeing plans to improve its range from 3,510 nmi (4,040 mi; 6,500 km) to 3,605 nmi (4,149 mi; 6,676 km) after 2021.^[90]Lion Air is the launch customer with an order for 201 in February 2012.^[34] It made its roll-out on March 7, 2017, and first flight on April 13, 2017;^[110] it took off from Renton Municipal Airport and landed at Boeing Field after a 2 hr 42 min flight.^[111] It was presented at the 2017 Paris Air Show.^[112]

Boeing 737-9 flight tests were scheduled to run through 2017, with 30% of the -8 tests repeated; aircraft 1D001 was used for auto-land, avionics, flutter, and mostly stability-and-control trials, while 1D002 was used for environment control system testing.^[44] It was certified by February 2018.^[113] Asian low-cost carrier Lion Air Group took delivery of the first on March 21, 2018 before entering service with Thai Lion Air.^[81] As the competing A321neo attracts more orders, the value of 737-9 is the same as a 2018 737-8 at $53million.^[114]

737 MAX 10[edit]

To compete with the Airbus A321neo, loyal customers such as Korean Air and United Airlines pressed Boeing to develop a larger variant than the MAX 9, of which Boeing revealed studies in early 2016.^[115] As the A321neo had outsold the MAX 9 five-to-one, the proposed MAX 10 included a larger engine, stronger wing, and telescoping landing gear in mid-2016.^[116] In September 2016, it was reported that the variant would be simpler and lower-risk with a modest stretch of 6–7 ft (1.83–2.13 m) for a length of 143–144 ft (43.6–43.9 m), seating 12–18 more passengers for 192-198 in a dual-class layout or 226-232 for a single class, needing an uprated 31,000 lbf (140 kN) CFM LEAP-1B that could be available by 2019 or 2020 and would likely require a landing-gear modification to move the rotation point slightly aft.^[117]

In October 2016, Boeing's board of directors granted authority to offer the stretched variant with two extra fuselage sections forward and aft with a 3,100 nautical miles (3,600 mi; 5,700 km) range reduced from 3,300 nautical miles (3,800 mi; 6,100 km) of the -9.^[115] In early 2017, Boeing showed a 66 in (1.7 m) stretch to 143 feet (44 m), enabling seating for 230 in a single class or 189 in two-class capacity, compared to 193 in two-class seating for the A321neo. The modest stretch of the MAX 10 enables the aircraft to retain the existing wing and CFM Leap 1B engine from the MAX 9 with a trailing-link main landing gear as the only major change.^[118] Boeing 737 MAX Vice President and General Manager Keith Leverkuhn says the design has to be frozen in 2018 for a 2020 introduction.^[115]

Boeing hopes that 737-900 operators and 737 MAX 9 customers like United Airlines, Delta Air Lines, Alaska Airlines, Air Canada, Lion Air, and Chinese airlines will be interested in the new variant.^[119] Boeing predicts a 5% lower trip cost and seat cost compared to the A321neo.^[120]Air Lease Corporation wants it a year sooner; its CEO John Pleuger stated 'It would have been better to get the first airplane in March 2019, but I don't think that's possible'.^[121]AerCap CEO Aengus Kelly is cautious and said the -9 and -10 'will cannibalize each other'.^[115]

The MAX 10 was launched on June 19, 2017, with 240 orders and commitments from more than ten customers.^[122][123]United Airlines will be the largest 737 MAX 10 customer, converting 100 of their 161 orders for the MAX 9 into orders for the MAX 10.^[124] Boeing ended the 2017 Paris Air Show with 361 orders and commitments, including 214 conversions, from 16 customers,^[125] including 50 orders from Lion Air.^[126]

The variant configuration was firmed up by February 2018,^[127] and by mid-2018, the critical design review was completed. As of August 2018, assembly was underway with a first flight planned for late 2019. The semi-levered landing gear design has a telescoping oleo-pneumatic strut with a down-swinging lever to permit a 9.5 inches (24 cm) taller gear. Driven by the existing retraction system, a shrink-link mechanical linkage mechanism at the top of the leg, inspired by carrier aircraft designs, allows the gear to be drawn in and shortened while being retracted into the existing wheel well.^[128][129] Entry into service is slated for July 2020.^[130]

Boeing Business Jet[edit]

The BBJ MAX 8 and BBJ MAX 9 are proposed business jet variants of the Boeing 737 MAX 8 and 9 with new CFM LEAP-1B engines and advanced winglets providing 13% better fuel burn than the Boeing Business Jet; the BBJ MAX 8 will have a 6,325 nmi (11,710 km) range and the BBJ MAX 9 a 6,255 nmi (11,580 km) range.^[131] The BBJ MAX 7 was unveiled in October 2016 with a 7,000 nmi (12,960 km) range and 10% lower operating costs than the original BBJ while being larger.^[132] The MAX BBJ 8 first flew on April 16, 2018, before delivery later the same year, and will have a range of 6,640 nmi (12,300 km) with an auxiliary fuel tank.^[133]

Orders and deliveries[edit]

Initially, the customers for the 737 MAX were not disclosed, except for American Airlines. On November 17, 2011, Boeing released the names of two other customers—Lion Air and SMBC Aviation Capital. At that time, Boeing reported 700 commitments from 9 customers for the 737 MAX.^[134][135] On December 13, 2011, Southwest Airlines ordered 150 737 MAX aircraft with 150 options.^[136]

By December 2011, Boeing had 948 commitments and firm orders from 13 customers for the 737 MAX.^[137] On September 8, 2014, Ryanair signed an agreement with Boeing to purchase up to 200 new Boeing 737 MAX 200 'gamechanger' aircraft—comprising 100 firm orders and 100 options.^[138] In January 2017, aircraft leasing company GECAS ordered 75 more 737 MAX 8 airliners.^[139]

As of January 2019, Boeing had 5,011 firm orders from 78 identified customers for the 737 MAX.^[5] The top three identified airline customers for the 737 MAX are Southwest Airlines with 280 orders, flydubai with 251 orders, and Lion Air with 251 orders.^[12] The first new series aircraft, a MAX 8, was delivered to Malindo Air on May 16, 2017.^[11]

Following the groundings in March 2019, Boeing suspended deliveries of 737 MAX aircraft,^[140] and reduced production from 52 to 42 aircraft per month.^[141] The first confirmed cancellation was announced on March 14, 2019, when Indonesian flag carrier Garuda Indonesia announced the cancellation of 49 orders for the aircraft, citing 'concerns on the safety of passengers'.^[142] In July 2019, the Saudi carrier Flyadeal canceled a $6bn order for thirty 737 MAX 8 aircraft, and stated that it would instead purchase A320neo aircraft from Airbus.^[143] On August 19, 2019, Forbes estimated that the MAX would not resume service before 2020.^[144]

As of April 1, 2019^[12]

Cumulative Boeing 737 MAX orders and deliveries

Orders

Deliveries

As of April 1, 2019^[12]

Accidents and incidents[edit]

In the two years of the 737 MAX's commercial service prior to its grounding, the global fleet of nearly 400 aircraft flew 500,000 flights and suffered two hull loss incidents. According to a statistical metric gathered on March 11, 2019, the 737 MAX's accident rate was second behind the Concorde, with four accidents per million flights, compared to the 737 Next Generation's 0.2 accidents per million flights.^[145]

On April 29, Boeing CEO Dennis Muilenburg stated that the aircraft involved were 'properly designed' and that the crashes were caused in part by flight crew not fully following procedures that they were provided. On April 4, Muilenburg had said 'It's our responsibility to eliminate this risk. We own it and we know how to do it.”^[146]

On May 14, reports surfaced of meetings between American Airlines pilots and Boeing executives before the Ethiopian Airlines crash, where the pilots asked Boeing to work urgently on a fix of the MCAS software. The FAA had already issued one directive after the Lion Air crash, instructing airlines to revise their flight manuals to include information on how to respond to a malfunction of the anti-stall system known as MCAS. In a closed-door meeting pilots and pilot union representatives argued that Boeing should push authorities to take an emergency measure that would likely had resulted in the grounding of the Max, including changes to the MCAS, while Boeing executives resisted. Mike Sinnet, Boeing Vice President present at the meeting, said he felt confident that pilots had adequate training to deal with a problem, especially now that pilots — who were not initially informed about existence of the new MCAS system — were aware of it. The pilots expressed frustration that Boeing did not inform them about the new software on the plane until after the Lion Air crash. 'These guys didn’t even know the damn system was on the airplane, nor did anybody else,' said Michael Michaelis, the union’s head of safety at the meeting. Mr. Sinnett said in the meeting. 'The worst thing that can ever happen is a tragedy like this, and the even worse thing would be another one.'^[147]

On May 18, 2019, Boeing admitted that flaws in 737 MAX simulator software made the system unable to reproduce flight conditions that contributed to the crashes in Ethiopia and Indonesia.^[148]

Lion Air Flight 610 crash[edit]

On October 29, 2018, Lion Air Flight 610, 737 MAX 8 registration PK-LQP, plunged into the Java Sea 13 minutes after take off from Soekarno–Hatta International Airport, Jakarta, Indonesia. The flight was a scheduled domestic flight to Depati Amir Airport, Pangkal Pinang, Indonesia. All 189 on board died. This was the first fatal aviation accident and first hull loss of a 737 MAX. The aircraft had been delivered to Lion Air two months earlier.^[149][150] People familiar with the investigation reported that during a flight piloted by a different crew on the day before the crash, the same aircraft experienced a similar malfunction but an extra pilot sitting in the cockpit jumpseat correctly diagnosed the problem and told the crew how to disable the flight-control system.^[151] Following the Lion Air crash, Boeing issued an operational manual guidance, advising airlines on how to address erroneous cockpit readings. The accident is under investigation,^[152] with the final report expected to be released between August and September 2019.^[153]

Ethiopian Airlines Flight 302 crash[edit]

On March 10, 2019, Ethiopian Airlines Flight 302, 737 MAX 8 registration ET-AVJ, crashed approximately six minutes after takeoff from Addis Ababa, Ethiopia,^[154] on a scheduled flight to Nairobi, Kenya,^[155] killing all 149 passengers and 8 crew members on board. The aircraft was four months old at the time.^[156] The cause of the crash is unclear as of March 19, 2019, though the aircraft's vertical speed after takeoff was reported to be unstable.^[157] Evidence retrieved on the crash site suggests that, at the time of the crash, the aircraft was configured to dive, similar to Lion Air Flight 610.^[158] According to Ethiopian transport minister Dagmawit Moges, on April 4, the crew 'performed all the procedures repeatedly provided by the manufacturer but was not able to control the aircraft'.^[159] On May 21, CNBC reported that according to a person familiar with the matter, U.S. aviation officials believe a bird strike may have led to the crash of ET302. Boeing's shares rose in response to this information.^[160] The subsequent findings in the Ethiopian Airlines crash and the Lion Air crash led to the Boeing 737 MAX groundings across the world.

Specifications[edit]

See also[edit]

Related development

Aircraft of comparable role, configuration and era

• Airbus A220-300 (originally developed as Bombardier CSeries)

Notes[edit]

1. ^with 7 ACT: 10,394 USgal / 39,345 L - 69,640 lb / 31,594 kg
2. ^MAX 200: 2,700 nmi (5,000 km)^[168]
3. ^ ^abWith one auxiliary tank^[167]

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Further reading[edit]

• Wise, Jeff (March 11, 2019). 'Where did Boeing go wrong?'. Slate.
• 'Countdown to Launch: The Boeing 737 MAX Timeline'. Airways. January 27, 2016.

External links[edit]

• Smith, Paul (May 12, 2017). 'Flight test: Boeing's 737 Max – the same but different'. FlightGlobal.

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On Sunday I was scheduled to fly on three of the very first Southwest revenue flights utilizing the airline’s brand new 737 MAX 8. Unfortunately only one of the flights took place, as a technical issue prevented the plane from departing Houston Hobby (HOU) on its second flight. But before the aircraft (N8707P) cut our journey short (along with its own), WN1 from Dallas Love Field (DAL) to Houston Hobby went off without a hitch, and passengers got an idea just how comfortable the hard product is.

I arrived at the gate for WN1 around 5:15am and, to my surprise, there were already a good number of people sitting at the gate area. You could tell they weren’t on this flight by chance, with many people sporting Boeing or 737 MAX 8 shirts and hats.

At the gate was also a photo booth, complete with a green screen.

Southwest employees encouraged passengers to get their photo taken with the 737 MAX. Options for a backdrop included the cockpit, the fuselage or the engine. All photos could either be printed or emailed, and each was captioned “To the MAX.” Both passengers and Southwest employees lined up for their pictures up until boarding time.

Employees also set up a booth with some Southwest-branded trinkets — luggage tags, sunglasses, a pen and headphones. A gate agent informed passengers that the trinkets weren’t a free-for-all, but instead prizes for giveaways. However, the giveaways never happened and people ended up taking whatever they wanted.

Boarding was set to begin at 6:30am, and there was much excitement around the gate area as the time approached.

There was word that Southwest CEO Gary Kelly would be on the flight, and just about 5 minutes before boarding was set to begin, Kelly made his way to the desk. Kelly welcomed and thanked everyone for being on board the inaugural flight. He gave some facts about the MAX and what it meant for the company — especially how the fuel efficiency of the MAX could take Southwest to new destinations. Of course, someone mentioned Hawaii, a long-awaited announcement from the carrier.

There was certainly plenty of excitement from both the passengers and employees. However, while there was certainly a buzz in the air, there was a feeling there could have been more celebration. I talked to one gentleman who asked where the Champagne was. That being said, the above-and-beyond friendly nature of the gate agents, AvGeeks and employees was enough to keep up the level of excitement — even at 6:30am.

Whereas I normally use my phone to board, this process turned out to be a bit different. A Southwest employee came up to me and gave me a paper boarding pass to remember the flight by. It had “737 MAX 8 inaugural flight” written in the bottom left corner.

Gary Kelly stood at the forward of the cabin and personally greeted every passenger as they entered the plane — a handshake, the opportunity to take a selfie and discuss the new aircraft.

That hospitality from Kelly didn’t end at all during the flight. Kelly made his presence known, welcoming everyone on board when we reached a cruising altitude. He’s a very likable figure, having full conversations with passengers and posing for countless pictures. Kelly took a seat in row 22 — an aisle seat.

Just before takeoff, flight attendants randomly drew two winners who walked away with 25,000 Rapid Rewards points each. Then, while we were in the air, Kelly made his way to the front of the cabin and gave away an Apple Watch.

The flight itself was noticeably different and more pleasant than on the 737 MAX 8’s predecessors. Specifically, I noticed how quiet the ride was — it’s much more enjoyable than on other aircraft.

Like the new 737-800s, this aircraft features 175 seats in a 3-3 configuration. Each of the seats has a spacious 32 inches of pitch and a generous 17.6 inches of width.

I’ll go into more detail on the flight experience and cabin itself in a separate post, but overall, it was a great experience, and will be much more comfortable for new routes as Southwest (hopefully) expands to longer-haul routes. *cough, Hawaii, cough*

Stay tuned for a full review of the experience, as well as a post that goes more into the hard product itself.

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Does Mac Move The Manual Trim Wheel Move On The 737 Max Review

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Does Mac Move The Manual Trim Wheel Move On The 737 Max Youtube

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