Boeing's CST-100 Starliner spacecraft docked to the International Space Station during the Crew Flight Test mission. Credit: NASA

WASHINGTON — NASA’s safety advisers say that while the agency and Boeing continue to make progress in addressing problems with the CST-100 Starliner commercial crew vehicle, it could be up to a year before it flies again.

Members of the Aerospace Safety Advisory Panel, or ASAP, said at a June 22 meeting that although Boeing was committed to fixing problems with Starliner, there was no clear timetable for flying the vehicle on an uncrewed test flight, called Starliner-1.

“Teams continue to work through technical issues from CFT and address actions from the PIT report,” said Kent Rominger, a former astronaut and member of the panel.

Starliner last launched in June 2024 on the Crew Flight Test, or CFT, mission with NASA astronauts Suni Williams and Butch Wilmore on board. The spacecraft experienced thruster failures on its approach to the International Space Station and, after months of analysis, NASA concluded it was not safe for Starliner to return with people on board. The spacecraft made an uncrewed return in September, while Williams and Wilmore remained on the ISS until March 2025, returning on a Crew Dragon.