Boeing 737 MAX certification flight test expected soon

A key step to the return to service of the grounded Boeing 737 MAX could take place as soon as early next week, two people briefed on the matter said.Boeing Co'sbest-selling plane has been grounded since March 2019 after two fatal crashes killed 346 people.The Federal Aviation Administration would then need to approve pilot training and complete other steps and would not likely approve plane's ungrounding until September, the sources said.