The Boeing 737 MAX 8 is the current-production successor to the 737-800 and the best-selling member of the MAX family. Launched in 2011 and entering commercial service in 2017 with Malindo Air, the MAX 8 offers around 14 percent better fuel efficiency than the -800 it replaces, driven by larger CFM LEAP engines and redesigned winglets. The type was grounded worldwide from March 2019 to December 2020 following two fatal accidents involving the MCAS flight control software, and the aftermath reshaped how the aviation industry approaches software certification on commercial aircraft. Since returning to service, the MAX 8 has become a central aircraft for Southwest, Ryanair, American, United, and a long list of international carriers. You can identify it by its split-scimitar winglets, which curve upward and downward from a single point, and by its enlarged engine nacelles compared to earlier 737 variants.