The move came after numerous congressional hearings on the crashes that led to criticism of the FAA for lax oversight and Boeing for rushing to implement a new software system that put profits over safety and ultimately led to the firing of its CEO.
Investigators focused on anti-stall software that Boeing had devised to counter the plane’s tendency to tilt nose-up because of the size and placement of the engines. That software pushed the nose down repeatedly on both planes that crashed, overcoming the pilots' struggles to regain control. In each case, a single faulty sensor triggered the nose-down pitch.
The FAA required Boeing to change the software so it doesn’t repeatedly point the nose of the plane down to counteract possible aerodynamic stalling. Boeing said the software also does not override the pilot’s controls like it did in the past. Boeing also must install new display systems for pilots and change the way wires are routed to a tail stabilizer bar.
Boeing’s redemption comes in the middle of a pandemic that has scared away passengers and decimated the aviation industry, limiting the company’s ability to make a comeback. Air travel in the U.S. alone is down about 65% from a year ago.
Boeing sales of new planes have plunged because of the Max crisis and the coronavirus pandemic. Orders for more than 1,000 Max jets have been canceled or removed from Boeing’s backlog this year. Each plane carries a sticker price between $99 million and $135 million, although airlines routinely pay far less than list price.
John Hansman, an aeronautics professor at MIT, said people typically avoid airplanes for a few months after there are problems. But the Max case is unusual, and were it not for the novel coronavirus, Hansman said he would feel safe flying on a Max.
“This whole thing has had more scrutiny than any airplane in the world,” he said. “It’s probably the safest airplane to be on.”
American is the only U.S. airline to put the Max back in its schedule so far, starting with one round trip daily between New York and Miami beginning Dec. 29.