Travel FAA certifies troubled Boeing 737 Max to fly again, but critics fear jetliner’s ‘basic aerodynamic problem’ November 18, 2020November 18, 2020Chris Woodyard, USA TODAYComments Off on FAA certifies troubled Boeing 737 Max to fly again, but critics fear jetliner’s ‘basic aerodynamic problem’ The popular Boeing jetliner has been grounded for 20 months after two international crashes that killed 346 passengers and crew.