The Federal Aviation Administration on Saturday ordered U.S. airlines to stop using some Boeing 737 Max 9 planes until they are inspected, less than a day after one of those planes lost a chunk of its body in midair “with an extremely loud pop,” terrifying passengers before the jet safely returned to ground.

Those on board Alaska Airlines Flight 1282 described an unnerving experience during the 20 minutes of the flight, which was destined for Ontario, Calif., but returned to Portland International Airport in Oregon on Friday night. As yellow oxygen masks dangled above their heads, a powerful wind tore through a gaping hole that showed the night sky and the city lights below.