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ULA scrubbed its Atlas 5 commercial launch today after detecting “a small ground side LH2 leak.”
Friday’s launch was proceeding to the final minutes of the countdown, prior to a decision to standdown due to a small ground side LH2 leak resulting in an ice ball forming on an umbilical. ULA CEO Tory Bruno noted this was outside of ULA’s historic experience, thus resulting in a scrub – for at least 24 hours – to resolve.
Later, a ULA source noted the next attempt would be Sunday, in order to allow time to replace a Fill and Drain (F&D) valve that was deemed to be the problem during Friday’s attempt.
I must say I am intrigued by the language used by Bruno here, especially coming so soon after SpaceX’s somewhat unprecedented launchpad explosion September 1st.