The test flight of Boeing’s Starliner capsule — which turned into a monthslong stay in space for two astronauts — was a debacle in the same league as shuttle disasters, NASA said.

Astronauts Barry "Butch" Wilmore and Sunita Williams were expecting to spend eight to 10 days in space. They ended up​ remaining in orbit for 286 days.

A review of the troubled Starliner mission in 2024 has classified the spacecraft’s first-ever crewed flight as a “Type A mishap,” a category encompassing the most severe unplanned events that pose a threat to life.