NASA to retry Boeing Starliner missions after 2024 failure
Uncrewed test flight planned for December following safety concerns from previous mission.
1Starliner's troubled history
Boeing's CST-100 Starliner hasn't flown since its failed 2024 crewed mission where astronauts spent 286 days unexpectedly stranded on the ISS. The mission revealed multiple failures including thruster malfunctions and helium leaks, compounded by NASA's oversight lapses and Boeing's lack of data transparency. A February 2024 NASA report identified these as primary causes for the mission's extended duration and safety concerns.
2Upcoming uncrewed test
NASA plans an uncrewed Starliner test flight to the ISS as early as December 2024 to validate design fixes. Key modifications include revised seal designs and thruster system upgrades. This represents a technical step back for the program, delaying crewed missions until at least 2028. The test will collect crucial data on whether the remediation efforts have addressed previous failure points.
3Astronaut assignment
NASA astronaut Woody Hoburg is slated to command Starliner's first crewed mission in 2028 if the December test succeeds. NASA administrator Jared Isaacman praised Hoburg's technical expertise and prior experience with critical systems. Hoburg's selection signals NASA's confidence in both the astronaut and the modified spacecraft design after the 2024 setbacks.
4Launch vehicle change
Future Starliner missions will switch from United Launch Alliance's Atlas V to the Vulcan Centaur heavy-lift rocket, as the Atlas V is no longer in production. This introduces new integration challenges but provides greater payload capacity. The rocket transition adds another layer of complexity to Starliner's return-to-flight efforts following the 2024 incident.
5NASA's redundancy needs
With only SpaceX's Crew Dragon currently operational for crew transport, NASA emphasizes the need for Starliner as a backup option. SpaceX's focus on developing Starship means Dragon's long-term availability is uncertain. NASA views having multiple crew capsule options as critical for maintaining consistent ISS access and supporting future space economy growth.
6Limited supplier options
NASA confirms Boeing and SpaceX remain the sole crew capsule providers for ISS missions in the foreseeable future. While SpaceX currently handles all operational flights, NASA remains committed to making Starliner viable. This duopoly situation creates strategic dependencies but aligns with NASA's historical approach to human spaceflight partnerships.
7Design modifications
Post-2024 mission analysis drove numerous Starliner redesigns beyond thruster fixes. Engineers focused on improving component reliability and failure detection systems. These changes aim to prevent recurrence of the issues that stranded astronauts Wilmore and Williams. The December test will specifically evaluate whether the modifications adequately address the root causes identified in NASA's report.
8Program implications
Starliner's struggles highlight the challenges of public-private space partnerships. With $4.2 billion invested, NASA needs Starliner operational to validate its commercial crew strategy. Success could reinforce the model for future missions, while continued problems might prompt reevaluation of Boeing's role in human spaceflight and NASA's oversight processes.