Boeing's Starliner spacecraft was recalled by the manufacturer because of sticky valves.
Starliner was designed to transport NASA astronauts to the International Space Station. It was years behind schedule. Boeing has suffered financial losses due to problems with earlier spacecraft.
Friday's announcement signifies that the capsule will be lifted off the Atlas 5 rocket at Cape Canaveral Space Force Station, Florida, and then returned to Boeings Kennedy Space Center factory nearby. It is possible that the crewless demonstration flight, which was scheduled to take place in June, will be delayed by at least two more months. Boeing's first flight without astronauts will be delayed even further.
This is a sad day, NASAs assistant administrator for human exploration, operations Kathy Lueders said in a telephone conference. This is yet another reason why demo missions are so important to us, I want to stress.
Crew Dragon, a similar spacecraft built by SpaceX for NASA, has carried astronauts to the station three times already. It may also carry two additional crews to orbit before 2021 ends.