A launch attempt by the Boeing Starliner crew was scrapped just before the final countdown

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Two NASA astronauts reached the final hours of their long-awaited launch attempt aboard Boeing’s Starliner capsule, marking the first crewed mission of the new spacecraft.

But the mission was scrapped about two hours before the countdown clock hit zero due to a problem with a valve on the Atlas V rocket, a workhorse vehicle built by Alabama-based United Launch Alliance that will send the Starliner capsule into space.

“We call it a rocket business 10 million details are business — and your rocket will only fly if 10 million details are correct,” ULA launch commentator Dillon Rice said during the webcast.

Starliner — designed to compete with Boeing SpaceX’s resourceful Crew Dragon capsule – It was scheduled to lift off from the Cape Canaveral Space Force Station in Florida at 10:34 p.m. Monday for its inaugural crewed test flight.

Launch controllers may make a second attempt at liftoff Tuesday night.

Weather or technical issues can always force a rocket launch to scrub all the way until the countdown clock hits zero, but the forecast for Tuesday’s launch attempt is as good as it gets. Meteorological officials have said that there is only A 5% chance Clouds, wind or storms get in the way.

Dubbed the Crew Flight Test, the mission could be the final major milestone before NASA deems Boeing’s spacecraft ready for routine operations as part of the federal agency’s Commercial Crew program. Starliner will join SpaceX’s Crew Dragon in NASA’s push to collaborate with private industry partners, expanding America’s options for carrying astronauts to the International Space Station.

Mission crew members are veteran astronauts Suni Williams and Butch Wilmore, who have each been to space on two previous missions aboard a NASA space shuttle and a Russian Soyuz mission.

“They’re checking multiple systems: life support, manual control,” NASA Administrator Bill Nelson said during a news conference Friday. “That’s why we put two test pilots on board — certainly Butch and Suni’s resumes are extensive.”

It will mark the sixth first mission of the sixth space shuttle in US history, Nelson noted: “It started with Mercury, then Gemini, then Apollo, then the Space Shuttle, then (SpaceX) Dragon – now Starliner.”

Williams is also the first woman to join such a mission.

If all goes to plan after launch, the spacecraft carrying the astronauts will separate from the Atlas V rocket after reaching orbit and begin firing its own engines. Starliner will gradually make its way to the space station over 24 hours.

Williams and Willmore will spend a week in the orbiting lab Seven astronauts and astronauts Already on board, while the Starliner is parked outside.

The two will then return home in the same Starliner capsule, which is expected to land by parachute at one of several designated locations in the American Southwest.

The soft test travels a lot on the plane. NASA has been waiting half a decade to launch a crew of Starliner flights, and Starliner’s development has been plagued by years of delays, setbacks and mistakes. More broadly, Boeing has been plagued by scandals in its aircraft division for years, tarnishing its traditional aerospace company brand.

Mark Nappi, Boeing’s vice president and Starliner project manager, spoke about the development process during Friday’s briefing. “Really my source of hope is going through that process.”

If the crewed test flight is successful, Boeing could be lined up to begin routine missions to the space station on behalf of NASA.

After the Space Shuttle program was retired in 2011, in 2014, the US space agency selected Boeing to develop the Starliner alongside SpaceX and its Crew Dragon capsule.

SpaceX finally beat Boeing to the launch pad in May 2020 with a crewed flight test of the Crew Dragon capsule. NASA’s personnel transportation needs since then.