Aerospace manufacturing giant Boeing’s stock has regained some altitude after the COVID-19 travel industry plummet, but it continues to face significant market turbulence. Regulators from multiple countries and agencies are subjecting the company to unusually close scrutiny, for good reason.

This year alone, one Boeing 737 Max had to make an emergency landing after a “plug door” came off at 16,000 feet. Terrified passengers flying out of Portland, Oregon, on Alaska Airlines flight 1282 got to know the meaning of “explosive decompression” up close.