Boeing 737 MAX begins key certification test flights

A Boeing Co737 MAX took off on Monday just before 1 p.m. EDT (1000 PDT/1700 GMT) from a Seattle-area airport on the first day of certification flight testing with U.S. Federal Aviation Administration test pilots, a crucial moment in its worst-ever crisis.Boeing Flight 701 departed King County International Airport, which is also known as Boeing Field, a Reuters witness confirmed.The plane is scheduled to land two hours later at Moses Lake airport, according to flight tracking website FlightAware