NASA and Boeing have confirmed major Starliner delays, pushing the next mission to 2026. The decision follows serious technical problems during the spacecraft’s first crewed mission. While the space capsule successfully reached the International Space Station (ISS) in June 2024, critical thruster failures and helium leaks forced NASA to halt further flights for repairs and testing.
ISS Traffic Rises Without Starliner
The ISS remains a busy hub for space traffic. In recent weeks, private Ax-4 astronauts undocked, a SpaceX Cargo Dragon departed, and a Russian Progress ship arrived. More missions are scheduled throughout the year, keeping the orbital lab bustling. However, Starliner is now absent from these plans, likely sidelined until early 2026.
NASA and Boeing had originally aimed for a faster turnaround, hoping to complete tests at White Sands this summer. But troubleshooting proved more complex than expected. The revised timeline reflects the seriousness of the spacecraft’s technical challenges.
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What Went Wrong with Starliner
Starliner launched its first crewed mission, Crew Flight Test (CFT), in June 2024. The capsule carried NASA astronauts Sunita Williams and Butch Wilmore for what was supposed to be a short visit to the ISS. Before this mission, Starliner flew two uncrewed tests: one in 2019 that failed to reach the ISS due to a software error, and a second in 2022 that succeeded.
During the 2024 mission, Starliner performed a series of planned maneuvers as it approached the ISS. But engineers soon discovered that four helium leaks had developed in flight. Five of its 28 reaction control system (RCS) thrusters also failed.
The problems were traced to Starliner’s service module, which houses systems inside structures known as “doghouses.” These enclosures contain both RCS and Orbital Maneuvering and Attitude Control (OMAC) thrusters, which share helium pressurization and complex piping. The faults in this interconnected network have proven difficult to fix.
Crew Stay Extended Due to Risks
Because of the failures, Williams and Wilmore’s stay aboard the ISS was extended multiple times. NASA and Boeing engineers worked from the ground to investigate and monitor the situation. Out of caution, they ultimately decided to return the spacecraft without astronauts on board.
NASA emphasized safety in every step of the decision-making process. Despite the return of the capsule, the spacecraft will not fly again until all systems are revalidated and safety concerns are resolved.
Doghouses Become a Major Engineering Focus
Starliner’s doghouses—now central to its design problems—are being redesigned and retested. Engineers believe fixing these units is key to preventing further helium leaks and thruster issues.
Upcoming tests at White Sands Test Facility in New Mexico will focus on these components. If successful, the spacecraft might be cleared for future flights with crew. However, NASA officials now say no flight will occur before early 2026.
Boeing Faces Mounting Pressure
The delay places additional pressure on Boeing, which has already fallen years behind schedule in NASA’s Commercial Crew Program. Meanwhile, SpaceX continues to deliver regular and successful missions with its Crew Dragon capsule.
Boeing had hoped the 2024 flight would restore confidence in Starliner’s reliability. Instead, it raised more questions about the capsule’s readiness for sustained crew operations.
Next Steps for Starliner
NASA says it remains committed to having two reliable crew transport providers. However, until Boeing demonstrates Starliner can fly safely, the agency will rely solely on SpaceX.
While the pause in flights is frustrating for all involved, NASA maintains that safety must come first. Engineers will now take the time needed to fix what went wrong and ensure future Starliner flights are safe and successful.
Looking Ahead
As Starliner delays extend into 2026, the spotlight remains on Boeing’s ability to deliver. The upcoming test results will be critical in determining the spacecraft’s future role in U.S. spaceflight. Until then, the ISS will continue to rely on other vehicles to support its growing needs.
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