The two test pilots launched to the International Space Space in early June where they were due to stay for a week. They will now return in February.
ADVERTISEMENTNASA decided on Saturday that it’s too risky to bring two astronauts back from the International Space Station (ISS) in Boeing’s troubled new capsule, and they'll have to wait until next year to travel home with SpaceX.
What should have been a week-long test flight for the pair will now last more than eight months, the space agency has determined.
The seasoned pilots have been stuck in space since the beginning of June.
A cascade of vexing thruster failures and helium leaks in the new capsule marred their trip to the space station, and they ended up in a holding pattern as engineers conducted tests and debated what to do about the trip back.
After almost three months, the decision finally came down from NASA’s highest ranks on Saturday. Butch Wilmore and Suni Williams will come back in a SpaceX spacecraft in February.
Their empty Starliner capsule will undock in early September and attempt to return on autopilot and touch down in the New Mexico desert.
As Starliner’s test pilots, the pair should have overseen this critical last leg of the journey.
"A test flight by nature is neither safe nor routine," said NASA Administrator Bill Nelson. "And so the decision... is a commitment to safety".
"This has not been an easy decision, but it is absolutely the right one," added Jim Free, NASA's associate administrator.
Boeing 'continues to focus on safety'
It was a blow to Boeing, adding to the safety concerns plaguing the company on its airplane side. Boeing had counted on Starliner’s first crew trip to revive the troubled programme after years of delays and ballooning costs.
The company had insisted Starliner was safe based on all the recent thruster tests both in space and on the ground.
Boeing did not participate in Saturday's news conference by NASA but released a statement: "Boeing continues to focus, first and foremost, on the safety of the crew and spacecraft. We are executing the mission as determined by NASA, and we are preparing the spacecraft for a safe and successful uncrewed return".
Retired Navy captains with previous long-duration spaceflight experience, Wilmore, 61, and Williams, 58, anticipated surprises when they accepted the shakedown cruise of a new spacecraft, although not quite to this extent.
Before their June 5 launch from Cape Canaveral, Florida, they said their families bought into the uncertainty and stress of their professional careers decades ago.
During their lone orbital news conference last month, they said they had trust in the thruster testing being conducted. They had no complaints, they added, and enjoyed pitching in with space station work.
ADVERTISEMENTSoyuz is not an option
NASA's Norm Knight said he talked to the astronauts on Saturday and they fully support the decision to delay their return. There were very few options.
The SpaceX capsule currently parked at the ISS is reserved for the four residents who have been there since March. They will return in late September, their stay extended a month by the Starliner dilemma.
NASA said it would be unsafe to squeeze two more into the capsule, except in an emergency.
The docked Russian Soyuz capsule is even tighter, capable of flying only three - two of them Russians wrapping up a yearlong stint.
ADVERTISEMENTSo Wilmore and Williams will wait for SpaceX's next taxi flight.
It’s due to launch in late September with two astronauts instead of the usual four for a routine six-month stay. NASA yanked two to make room for Wilmore and Williams on the return flight in late February.
NASA said no serious consideration was given to asking SpaceX for a quick stand-alone rescue. Last year, the Russian Space Agency had to rush up a replacement Soyuz capsule for three men whose original craft was damaged by space junk.
The switch pushed their mission beyond a year, a US space endurance record still held by Frank Rubio.
ADVERTISEMENTStarliner plagued with issues
Starliner’s woes began long before its latest flight.
Bad software fouled the first test flight without a crew in 2019, prompting a do-over in 2022. Then parachute and other issues cropped up, including a helium leak in the capsule’s propellant system that nixed a launch attempt in May.
The leak eventually was deemed to be isolated and small enough to pose no concern. But more leaks sprouted following liftoff, and five thrusters also failed.
All but one of those small thrusters restarted in flight. But engineers remain perplexed as to why some thruster seals appear to swell, obstructing the propellant lines, then revert to their normal size.
ADVERTISEMENTThese 28 thrusters are vital. Besides needed for space station rendezvous, they keep the capsule pointed in the right direction at flight’s end as bigger engines steer the craft out of orbit. Coming in crooked could result in catastrophe.
With the Columbia disaster still fresh in many minds - the shuttle broke apart during reentry in 2003, killing all seven aboard - NASA embraced open debate over Starliner’s return capability.
'100%' certain Starliner will fly again
Dissenting views were stifled during Columbia’s doomed flight, just as they were during Challenger’s in 1986.
Despite Saturday's decision, NASA isn’t giving up on Boeing. Nelson said he is "100 per cent" certain that Starliner will fly again.
ADVERTISEMENTNASA went into its commercial crew program a decade ago wanting two competing US companies ferrying astronauts in the post-shuttle era. Boeing won the bigger contract: more than $4 billion (€3.56 billion), compared with SpaceX’s $2.6 billion (€3.19 billion).
With station supply runs already under its belt, SpaceX aced its first of now nine astronaut flights in 2020, while Boeing got bogged down in design flaws that set the company back more than $1 billion (€892 million).
NASA officials still hold out hope that Starliner’s problems can be corrected in time for another crew flight in another year or so.
