NASA is facing a critical decision on how to return two astronauts from the International Space Station (ISS) after technical issues with Boeing's Starliner spacecraft. The agency is now considering using SpaceX's Crew Dragon as a potential rescue option.
Starliner's Troubled Mission
Boeing's CST-100 Starliner, carrying astronauts Barry Wilmore and Sunita Williams, experienced several problems during its mission:
- Helium leaks
- Multiple thruster failures
- Concerns about the reliability of reaction control system thrusters
These issues have raised doubts about Starliner's ability to safely return the crew to Earth.
NASA's Contingency Plan
NASA is now working with SpaceX on a potential rescue plan:
- Astronauts could return on SpaceX's Crew-9 mission in February 2025
- Crew-9 launch delayed to September 24, 2023, to accommodate this possibility
- Decision must be made by mid-August 2023
Technical Challenges
The root cause of Starliner's thruster problems remains unclear:
- Ground tests suggest issues with Teflon seals in oxidizer valves
- Engineers still don't fully understand the physics behind the problem
- Disagreements exist between NASA and Boeing on flight readiness
Additionally, Starliner's software would require updates for an uncrewed return, potentially taking up to four weeks to implement and test.
Implications for Boeing and NASA
If NASA opts for the SpaceX rescue:
- It would be another setback for Boeing's troubled Starliner program
- Highlights NASA's increasing reliance on SpaceX for crewed missions
- Boeing has already incurred $1.6 billion in cost overruns since 2016
As the mid-August deadline approaches, NASA faces a challenging decision balancing crew safety, program goals, and the future of commercial spaceflight partnerships.