NASA says Boeing Starliner decision may come Saturday
NASA said a decision could come as early as Saturday on when Boeing’s Starliner will come home from the International Space Station and whether its two astronauts will be on board.
In a post to NASA’s website, it said the decision would come at the end of an agency-level review that will be chaired by Ken Bowersox, associate administrator of NASA’s Space Operations Mission Directorate.
Plans are for that review to occur Saturday, and it will be the meeting during which “any formal dissents are presented and reconciled,” according to NASA. That could include NASA Administrator Bill Nelson and other top officials. NASA says it will host a televised press conference after the meeting to discuss the decision.
Starliner arrived to the ISS on June 6, one day after launching from Cape Canaveral with NASA astronauts Butch Wilmore and Suni Williams on board for what was supposed to be about an eight-day stay.
The spacecraft’s propulsion system, though, had five of 28 reaction control system thrusters fail on approach to the ISS while also suffering from several helium leaks. That led to delays in a decision to return home while Boeing and NASA worked to figure out the source of the problem — including running a series of tests on the ground and hot firing Starliner while still attached to the ISS.
While four of the five thrusters came back online and ground tests revealed the likely cause, there is nothing that can be done to fix the source problem now in space. So a flight home would have questions about a repeat of thruster failures, which are needed for the spacecraft’s departure from the ISS and during its reentry burn to return to Earth.
Data from all the tests is still being considered ahead of the review.
“NASA and Boeing are working to finalize and present flight rationale to various teams across the community and to the program control board,” NASA posted on its site. “Engineering teams have been working to evaluate a new model that represents the thruster mechanics and is designed to more accurately predict performance during the return phase of flight.”
NASA said the data includes new modeling and could refine risk assessment.
“After the agency-level decision, program and flight control teams will continue preparing for Starliner’s return, including training sessions and other actions as appropriate,” NASA stated.
While Boeing has been stumping for a crewed return of the spacecraft to complete the Crew Flight Test mission as planned, Bowersox this month revealed there has been dissent among NASA officials worried about the risk involved to the astronauts.
NASA revealed details about the prime backup plan to get Wilmore and Williams home on a SpaceX Crew Dragon next February instead while Starliner would undock without crew and complete its landing without them.
In that scenario, the upcoming SpaceX Crew-9 mission slated to fly to the ISS no earlier than Sept. 24, would go up with two instead of four astronauts so that Wilmore and Williams could take the remaining seats when that mission concludes.
That would stretch the Starliner astronauts’ stay on board the ISS to around 10 months.
Boeing is trying to get Starliner certified to join SpaceX as part of NASA’s Commercial Crew Program, with the two trading off duties to ferry astronauts to and from the ISS.
The CFT mission for Starliner was delayed several times as Boeing worked through a series of issues. Its launch came more than four years after SpaceX successfully launched its first crewed test flight of Crew Dragon.
Since that launch, SpaceX has flown an additional 12 times among its fleet of four Crew Dragons, including eight operational missions to the ISS for NASA.