, 24 tweets, 12 min read Read on Twitter
SpaceX updating media on test fire anomaly right now. Updates to follow in thread... #SpaceX #CrewDragon
Key findings on cause of accident. #SpaceX #CrewDragon
Other key findings on forward work... #SpaceX #CrewDragon
Good overview of the two thruster systems on Crew Dragon. Issue was on the SuperDraco high-pressure system. #SpaceX #CrewDragon
Video and telemetry supports findings in the data or a NTO leak into the fuel lines at pressurization. Tests at McGregor and with NASA also support this finding. #SpaceX #CrewDragon
Still not done with testing, but enough already found to begin forward work. NOT SuperDraco or COPV. It was the pressurization system that caused this. 80% done with faulty tree and investigation. "Want to make sure we've learned everything" -Hans, SpaceX. #SpaceX #CrewDragon
Have already replaced valve with burst disc. #SpaceX #CrewDragon
"Have really worked closely with NASA", Hans adds. Hans points out it was ground test, not a flight test. "We learned a lot." #SpaceX #CrewDragon
NASA rep on call: "My folks were on console when failure occurred and followed along and participated while SpX identified what went wrong." Kathy Leuders, Commercial Crew Program manager.
"SpaceX has done a lot of work and this is a great time share all that work." Kathy Leuders, NASA.
Mitigation might be small from component standpoint. Can fix issue in parellel with getting Crew Dragon ready for its first human carrying flight. - Hans, SpX. #SpaceX #CrewDragon
Great questions from @lorengrush about design. Hans confirms it is a design issue but also a feature of the check valves. Burst Disc they have now is safer going forward. Didn't expect it to be an issue, so why they went with valve v. burst disc. - Hans. #SpaceX #CrewDragon
High pressure system is 2400 psi for SuperDraco abort engines v. 300 psi for thrusters. Four valves have to be replaced. #SpaceX #CrewDragon
Hans confirms that issue - had it happened during an In Flight Abort - would have had same results of complete loss of Crew Dragon. #SpaceX #CrewDragon
"We fly when we're ready." -Hans. Not comment on schedule. #SpaceX #CrewDragon
Kathy from NASA not ruling out DM-2 happening this year, but lots to get through on the milestone list aside from this Crew Dragon SuperDraco thruster issue. #SpaceX #CrewDragon
Hans optimistic in possibility of flying DM-2 this year, but also acknowledges that it's difficult. #SpaceX #CrewDragon
Kathy from NASA touching on Boeing and Starliner. Notes they're still getting ready for uncrewed Orbital Flight Test. Defers talking about schedules for both providers. #SpaceX #CrewDragon
Great question from @EmreKelly about the difficulty of this investigation. Hans confirms that a lot of this understanding came together recently as they worked their way through the fault tree.
#SpaceX #CrewDragon
Hans says that while difficult, it has been fairly straight forward. #SpaceX #CrewDragon
Hans stated point blank that THIS is the right time to start talking publicly about issue. Says had they done this early, it would have solely been speculation. @SpaceX #SpaceX #CrewDragon
Hans: This isn't something the components (check valve) should have done. But it did. So we learned. And Crew Dragon is now safer. #SpaceX #CrewDragon
Kathy hammering home how open SpaceX has been throughout this entire process with NASA and the Astronaut Office. #SpaceX #CrewDragon
Update complete. Now to run to airport to catch a flight! #SpaceX #CrewDragon
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