Boeing’s 737 MAX fleet has been grounded by airlines around the world for the last three weeks. First flown commercially in 2017, the 737 MAX is the fourth generation of Boeing’s 737 series and it is actually not unusual for new aircraft to go through technical issues in the early years of operation. Both Airbus’ A380 airliner and Boeing’s Dreamliner were grounded in the past due to technical problems (the A380 had engine trouble in 2010 and the Dreamliner had battery issues in 2014). But the current situation is different on several fronts and could prove costly for Boeing.