Starliner Valve Investigation Continues to Focus on Moisture Interaction With Propellant - SpaceNews

HUNTSVILLE, Ala. — Boeing’s CST-100 Starliner was within hours of launch on its second uncrewed test flight in early August when stuck valves in the spacecraft’s propulsion system forced a launch scrub that has turned into a delay that will extend well into next year (View Highlight)

We’ve developed an extensive fault tree to go through and look at every possibility of what it could be,” he said. “We’re 75% through that fault tree. We’re clicking off the boxes.” (View Highlight)

Note: Wtf - compared to SpaceX this attitude and timing is laughable You have to iterate to get the learnings But also do enough prep to make the physical learnings better