Cape Canaveral, Florida – A technical issue with a valve on Boeing’s CST-100 Starliner led to the scrubbing of a planned launch of NASA astronauts on Monday night. The United Launch Alliance Atlas V rocket, with astronauts Butch Wilmore and Suni Williams on board, was set for liftoff when the launch attempt was called off due to unexpected sounds from the rocket. NASA’s Commercial Crew Program manager, Steve Stich, explained that a self-regulating valve on the liquid oxygen tank was exhibiting abnormal behavior, prompting the decision to scrub the launch.
The issue with the valve, which regulates pressure on the liquid oxygen tank, was not considered a major concern by ULA President and CEO Tory Bruno. He stated that had there been no crew on board, the fix would have been straightforward. However, ULA’s rules required not changing the fueling state of the rocket when astronauts are present, leading to the decision to scrub the launch.
After assessing the situation, NASA decided to replace the valve, necessitating the rocket to be rolled back to Boeing’s Vertical Integration Facility. The new launch target is set for Friday, May 17 at 6:16 p.m. Despite the setback, NASA has ample time to reschedule the launch as the International Space Station has no imminent cargo or crew missions planned.
Once the valve issue is resolved, the Starliner spacecraft will undergo a final qualification flight, ensuring its readiness for regular missions to the ISS alongside SpaceX’s Crew Dragon. The astronauts on board, Wilmore and Williams, will conduct manual operations during their approach to the ISS and will spend eight days on board before returning to Earth.
Boeing’s Commercial Crew Program manager, Mark Nappi, expressed confidence in the crew and their understanding of the complexities involved in space missions. Looking ahead, if the upcoming mission goes smoothly, Boeing could potentially launch its first regular mission, Starliner-1, as early as February 2025, with plans for multiple flights to the ISS through 2030.
Overall, the decision to delay the launch showcases the meticulous approach taken by NASA and its partners to ensure the safety and success of crewed missions to space. Through strategic planning and effective problem-solving, the mission is expected to proceed once the valve issue is resolved, paving the way for future collaborations in space exploration.