Starliner launch attempt scrubbed – SpaceNews

Up to date 5:45 p.m. Jap after announcement of the extra launch delay.

KENNEDY SPACE CENTER, Fla. — A final-minute downside scrubbed the Atlas 5 launch of Boeing’s CST-100 Starliner on its first crewed flight June 1, delaying the mission by no less than 4 days.

A floor laptop halted the countdown 3 minutes and 50 seconds earlier than the scheduled 12:25 p.m. Jap launch of the Crew Flight Take a look at (CFT) mission with NASA astronauts Butch Wilmore and Suni Williams on board. As a result of Starliner has an instantaneous launch window, the maintain scrubbed the launch try.

At a briefing just a few hours after the scrub, Tory Bruno, chief govt of United Launch Alliance, stated a card often known as the launch sequencer in one among three redundant floor management computer systems got here up slower than the opposite two when popping out of the T-4 minute maintain. “That tripped a crimson line and triggered an automated maintain,” he stated.

He stated technicians had not but been in a position to entry the computer systems, situated close to the launch pad, whereas automobile propellants are offloaded. He estimates it could take no less than just a few hours to verify the computer systems and see if any playing cards or different {hardware} malfunctioned and wanted to get replaced.

“If it’s so simple as changing a card, we’ve spares for every little thing,” he stated. That work could be simple sufficient to be accomplished in time for a June 2 launch try, he concluded then. “If it’s extra concerned than that or simply takes longer to get by way of all of that, then we might transfer to the backup date of the fifth.” There may be one other launch alternative June 6 as properly.

In an announcement about two hours after the briefing, NASA stated there wouldn’t be a June 2 launch try to present groups extra time to review the issue. An replace on the following launch try is anticipated on June 2.

NASA, Boeing and United Launch Alliance labored by way of different minor points throughout the countdown. About two hours earlier than the scheduled liftoff, launch controllers reported an issue with valves that management the move of liquid oxygen and liquid hydrogen into the Centaur higher stage to high off its tanks.

Bruno stated on the briefing that one of many three laptop racks was not commanding the valves to open, so controllers switched to a distinct rack. He stated it was the identical rack that later triggered the maintain, however concerned a distinct card. These playing cards typically have been dependable, he famous, though he stated it was “not unprecedented” to have to interchange a card.

Lower than 20 minutes earlier than liftoff, spacecraft controllers famous an issue with followers that flow into air within the strain fits Wilmore and Williams had been sporting. The followers had been working once more a couple of minutes later. Mark Nappi, Boeing vice chairman and industrial crew program supervisor, stated on the briefing {that a} voltage change because the spacecraft switched to inside energy triggered the followers to show off, and spacecraft controllers turned them again on.

The helium leak discovered after the earlier scrubbed launch try Could 6 was not a problem with this launch try. Controllers reported that the leak price was acceptable and, the truth is, had appeared to lower.

The last-minute scrub was a disappointment, officers acknowledged. “It’s human to be a bit disillusioned,” Steve Stich, NASA industrial crew program supervisor. “What kicks in, and what I noticed over within the management room and listening to the loops in Houston, is that everyone could be very skilled and so they’re used to it.”

A slip past June 6 might result in a considerably longer delay. Stich stated at a Could 31 prelaunch briefing that ULA would wish time to interchange batteries within the rocket if the automobile doesn’t launch by June 6. Gary Wentz, vice chairman of presidency and industrial packages at ULA, stated that battery substitute work would take about 10 days.

NASA officers stated earlier this 12 months that they wanted to finish the certification of Starliner by November or December in order that the primary operational mission, Starliner-1, can launch in early 2025 as at present deliberate. On the prelaunch briefing Could 31, Stich declined to say if that schedule will maintain even with the delay in launching CFT.

“That can be one thing that we’ll work on after the flight,” he stated of certification. “The trail to Starliner-1 clearly is thru Crew Flight Take a look at. That’s a very powerful factor we’ve in the direction of certification.”

Nappi stated Could 31 that 80% of the certification plan is already in place and is scheduled to be completed by November, however the the rest will depend on what occurs throughout the CFT mission, together with what in-flight anomalies happen that must be resolved.

“The longer it takes to fly CFT, the shorter that interval turns into for us to assessment that information,” he stated. “Getting the certification assessment completed as quickly as we will is essential no matter after we fly.”

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