The Boeing 737 MAX is the fourth generation of the Boeing 737, a narrow-body airliner manufactured by Boeing Commercial Airplanes (BCA). It succeeds the Boeing 737 Next Generation (NG). It 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.[9] The new series was publicly announced on August 30, 2011.[10] It took its maiden flight on January 29, 2016[1] and gained FAA certification in March 2017.[11][9] The first delivery was a MAX 8 in May 2017, to Malindo Air,[12] with whom it commenced service on May 22, 2017.[2]Boeing 737 MAXA WestJet Boeing 737 MAX 8 on final approachThe 737 MAX is a fourth-generation Boeing 737, re-engined with CFM LEAP-1B turbofans.RoleNarrow-body twin-engine jet airlinerNational originUnited StatesManufacturerBoeing Commercial AirplanesFirst flightJanuary 29, 2016[1]IntroductionMay 22, 2017 with Malindo Air[2]StatusCleared for commercial service by FAA (separate approvals in other nations)Primary usersSouthwest AirlinesAmerican Airlines Air Canada China Southern AirlinesProduced2014[3]-present[a]Number built387 delivered to customers as of March 2019[5] approx. 450 produced and stored as of October 2020[6]Program costAirframe only: $1–1.8 billion; including engine development: $2–3B[7]Unit costMAX 7: US$99.7 million MAX 8: US$121.6M MAX 200: US$124.8M MAX 9: US$128.9M MAX 10: US$134.9M as of 2019[8]Developed fromBoeing 737 Next GenerationThe 737 MAX series has been offered in four variants, offering 138 to 204 seats in typical two-class configuration[13] 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.[9] Additional length is offered with the further stretched 737 MAX 10. As of December 2019, the Boeing 737 MAX had received 4,932 firm orders and delivered 387 aircraft.[5]In