Boeing’s Starliner has two more chances this week to make its first crewed flight

After yesterday’s launch of the first crewed Starliner mission was scrubbed, NASA, Boeing and ULA made the decision to wait a few days before making another attempt. Starliner was scheduled to finally lift off on Saturday afternoon after a series of delays, but this attempt was aborted due to a last-minute issue with a ground computer system that plays a key role in launching the rocket. While NASA and partners discussed possibly flying today following their assessment of the issue, they’ve decided to hold off until the next opportunities, either on June 5 or 6.

Saturday’s launch wasn’t scrubbed due to a problem with the Starliner craft itself, but because an automatic hold was issued by the ground launch sequencer for a then-unknown reason. In a press conference later on Saturday, Tory Bruno, president and CEO of ULA explained that it came down to a problem in verifying the launch sequencer’s redundancy. There are three large computers in this system, all of which are the same so it’s “triple redundant,” Bruno said. During the system health check in the minutes before launch, one of the computers came up slow, triggering an automatic hold.

NASA said the decision to forgo today’s launch attempt was made in order to “give the team additional time to assess a ground support equipment issue.” The launch window opens again on June 5, but no target liftoff time has been announced just yet. If Starliner doesn’t fly by June 6, it’ll be set back by at least another 10 days, ArsTechnica reports, as the ULA team will need to swap out the Atlas V rocket’s batteries.

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