He did not provide further details.
Ferguson, an engineer and veteran of three Space Shuttle missions, left the NASA astronaut corps in 2011 to help Boeing design and build a next-generation spacecraft that could take over the task of transporting astronauts to and from the International Space Station.
In 2018, Boeing announced Ferguson would command the Starliner’s first-ever crewed test flight, and he was expected to become the first-ever NASA astronaut to travel to space after retiring from NASA. He was also seen as the first corporate astronaut — his flight suit bares a Boeing logo where others have the NASA emblem.
Ferguson was supposed to be the only Boeing employee onboard the Starliner test flight, and he was to be joined by two NASA astronauts inside the capsule on its maiden flight.
But now the flight will be all NASA astronauts.
NASA’s Barry “Butch” Wilmore, who’s served two prior stints on the International Space Station, will replace Ferguson as commander of the mission, joining NASA’s Mike Fincke and Nicole Mann, who were previously assigned.
Boeing now plans to repeat the uncrewed test flight in December or January. Starliner is not expected to be ready for its first crewed flight before June 2021.
Ferguson said via Twitter that he remains “deeply committed to human spaceflight” and “dedicated to the Starliner program.”
“I’m not going anywhere, I’m just not going into space next year,” he said, confirming he’ll continue to work with Boeing on the Starliner.
Boeing’s Starliner spacecraft is being developed under NASA’s Commercial Crew program, which allocated $4.2 billion to Boeing and $2.6 billion to SpaceX in 2014. Both companies were expected to develop spacecraft that would remain privately owned but that NASA could use to ferry astronauts to the ISS — a capability the space agency lost with the retirement of the Space Shuttle program in 2011.
SpaceX won the race to the launch pad with its May launch of a Crew Dragon capsule.
The first fully operational mission of the Crew Dragon, which will take four astronauts to the ISS for a six month stay, is expected to take off October 31.