It took decades for Boeing to build a reputation as one of the most reliable companies on the planet. It’s taken less than six years to undo it all and leave the once-great American company facing an uncertain future.

Regulators, airlines, fliers and even Boeing’s own workers are practically in revolt after a series of mid-flight disasters and a steady erosion of the company’s quality standards. Investors are none too thrilled, either: Boeing’s stock (BA) is down 27% for the year, making it the second-worst performer in the S&P 500, behind Tesla.

The latest headache for Boeing came Monday, when a 787 Dreamliner flying from Australia to New Zealand plunged suddenly mid-flight, injuring several passengers. It’s not clear what, if any, culpability Boeing has here — it said it’s gathering information about what went wrong. But the accounts from passengers are hardly flattering at a moment when Boeing is already under federal investigation for the Jan. 5 door-plug blowout.

Brian Jokat, a passenger on Monday’s Latam Airlines flight, told CNN he was jolted awake when the plane began falling so suddenly that people were tossed into the cabin ceiling. (In a separate interview with The Wall Street Journal, he said: “You know in The Exorcist, when the girl flies from the bed and hits the ceiling? It’s exactly that scene.” )