Boeing in Crisis After Second 737 Max Crash in Months

Boeing Co. Chief Executive Officer Dennis Muilenburg faces his biggest crisis yet following the second deadly crash of a 737 Max jetliner, as some airlines grounded the best-selling plane and the shares logged their biggest loss since the 9/11 attacks.

China ordered its carriers to ground all 96 of Boeing’s newest 737 model, while Indonesia said it would also halt flights after Ethiopian Airlines Flight 302 went down in a field shortly after takeoff Sunday, killing all 157 people on board. While the flight recorders have now been recovered and...