Completing a three-month test flight aboard the International Space Station, NASA and Boeing have returned the Starliner spacecraft safely to Earth — but without its crew, NASA astronauts Butch Willmore and Sonny Williams.

The Starliner undocked from the ISS late Friday night and after a 6-hour journey, landed at the White Sands Spaceport in New Mexico.

The capsule, which experienced technical problems after launch, was deemed too dangerous to carry the crew back to Earth.

Their eight-day mission will eventually last at least eight months, as the astronauts will return in a SpaceX vehicle no earlier than February 2025.

This is another blow to the prestige of Boeing, which already faces repeated failures in its aircraft.

According to the Daily Mail, Wilmore raised concerns about a “strange” noise last Saturday at the Johnson Space Center in Houston, just days before the capsule began its unmanned return trip to Earth.