In October 2018, a Lion Air Boeing 737 MAX plunged into the Java Sea, killing all 189 people onboard. It is caused by a possible sensor problem, and that has been enough for Boeing to issue safety warnings to all the airlines that operate those planes, telling pilots to brush up on how to deal with confusing readings or erratic actions from the flight control computer, which could cause the planes to dive, hard.
Any issue with the 737 MAX is concerning because it’s proving to be a popular model around the world for Boeing, which has delivered 219 of the fourth generation of the 737 narrow-body jet plane and is sitting on orders for more than 4,700 more, making it the fastest-selling plane in Boeing’s history. It’s an upgrade to previous 737s, with more efficient engines and distinctive split wingtips for better aerodynamics. Boeing started deliveries in May 2017. The biggest customers Internationally, Ethiopian Airlines, Air Canada, Lion, and Norwegian all have them in their fleets, as do several Chinese regional airlines.