Boeing 737 Max Jets Has New Flaw, This Time Over Flight Control Computer

Boeing Co will take until at least September to fix a newly identified problem on its grounded 737 MAX, a company official told Reuters, meaning the workhorse jet's return to service will be delayed until October at the earliest, significantly longer than most airlines had expected.

Boeing shares closed 3% lower on Thursday, after the Chicago-based company told air carriers that it would complete the latest software update for the 737 MAX by September after a new issue arose last week during a simulator test.

That is later than most airlines had expected: American Airlines Chief Executive Doug Parker said on June 12 it was "highly likely" flights would resume by mid-August. Most airlines have taken the MAX off their schedules until early September.