NASA and Boeing Outline Starliner's Future Crew Missions
Plans include additional flights and Vulcan rocket certification for ISS transport.
1Extended Starliner mission plans
NASA plans to exercise options for fifth and sixth crewed Starliner flights to the ISS, alongside certifying United Launch Alliance's Vulcan rocket as a successor to Atlas V. The agency emphasizes maintaining multiple crew transportation options through its Commercial Crew Program. Current timeline targets Starliner-2 crewed return by 2028, following an uncrewed Starliner-1 validation mission to test spacecraft improvements.
2Critical design modifications
Boeing implemented thermal modifications to Starliner's service module after investigation revealed thruster performance issues during Crew Flight Test. The problems stemmed from thermal environment factors and inherent design features affecting reaction control thrusters. NASA will evaluate these changes during Starliner-1 mission, with additional thruster valve modifications planned for future crewed flights to address poppet seal extrusion issues.
3Uncrewed test flight objectives
The Starliner-1 mission, potentially launching December 2026 or January 2027, will verify thermal environment improvements and gather system qualification data. This engineering evaluation aims to identify residual risks before crewed missions. NASA's Low Earth Orbit Program manager emphasizes these tests as critical for validating thermal performance - a key certification requirement for sustained human presence in low Earth orbit.
4Comprehensive safety overhaul
Following 2024's Crew Flight Test issues, NASA's Program Investigation Team made 61 recommendations for human spaceflight standards. Beyond thruster modifications, Boeing will install new crew module thrusters, batteries, and parachute system upgrades. These changes aim to address all identified failure modes from the first crewed flight while improving overall system reliability for certification.
5Commercial space transition
NASA frames these developments as essential for transitioning from ISS operations to commercial space stations. The agency highlights growing demand for diverse space transportation infrastructure including launch vehicles, transfer stages, and landers. Maintaining US crew transport capability supports this expansion while ensuring continued access to space during the transition period.
6Certification pathway challenges
Starliner's certification process involves rigorous testing of modified systems under operational conditions. NASA will implement disciplined operational controls during propulsion system tests, prioritizing crew and public safety. The phased approach allows for incremental validation of improvements, with crewed flights only proceeding after comprehensive uncrewed mission data review.
7Industry collaboration dynamics
The update demonstrates NASA's continued partnership approach with commercial entities like Boeing and United Launch Alliance. This model combines agency oversight with private sector innovation to develop next-generation space transportation systems. The collaboration addresses technical challenges while maintaining schedule pressures for ISS operations and future commercial destinations.
8Strategic implications for LEO access
These developments position Starliner as a critical component in maintaining US crew transportation redundancy alongside SpaceX's Dragon. Successful certification would provide NASA with two operational crew systems, enhancing mission flexibility and risk mitigation for ISS operations and future commercial station partnerships in low Earth orbit.
Original article: NASA — NASA and Boeing Outline Starliner's Future Crew Missions