Boeing Co. engineers were nearly done redesigning software on the grounded 737 Max last June when some pilots hopped into a simulator to test a few things. It didn’t go well. A simulated computer glitch caused it to to dive aggressively in a way that resembled the problem that had caused deadly crashes off Indonesia and in Ethiopia months earlier.
That led to an extensive redesign of the plane’s flight computers that has dragged on for months and repeatedly pushed back the date of its return to service, according to people briefed on the work. The company — which initially expressed confidence it could complete its application to recertify the plane with the Federal Aviation Administration within months — now says it hopes to do that before the end of the year. Read More