Boeing’s Starliner Launch Could Face Delay of Several Months

Boeing Co. ’s Starliner space capsule launch could be delayed several months as the company will likely need to remove it from atop a rocket for repairs, people familiar with the matter said.

Such a delay would be a setback for Boeing’s space program. The company has spent years developing the Starliner and was supposed to launch it late last month to dock with the International Space Station, without crew on board—after a failed attempt a year and a half ago. Ultimately, the capsule is supposed to ferry astronauts to the International Space Station.

Boeing engineers have been working to repair a problem with some of the valves in a propulsion system on the Starliner that was discovered earlier this month while the vehicle sat on a launchpad. The company first said it was investigating the valve issues last week, and on Monday disclosed that 13 valves had failed to open as expected during preflight checks.

Seven of the valves are working, the company has said, and engineers have continued to try to fix the others. The issue led the company and the National Aeronautics and Space Administration to postpone two potential launch dates for the Starliner last week.

As teams continued to work on the valve problem, separating the Starliner from the rocket appeared increasingly necessary, according to people familiar with the matter.