A top SpaceX official on Thursday confirmed reports that one of the company's Crew Dragon capsules was completely lost during a test failure in Cape Canaveral, Florida, in April.
"Here's what we can confirm ... just prior to when we wanted to fire the SuperDraco, there was an anomaly, and the vehicle was destroyed," SpaceX vice president of mission assurance Hans Koenigsmann said in a press briefing.
The capsule that was destroyed had previously been launched to the International Space Station, on SpaceX's "Demo-1" mission in March. With no astronauts inside during the launch, the capsule spent five days docked with the space station before returning, splashing down in the Atlantic Ocean.
Multiple NASA officials have stated since the test failure on April 20 that the agency is working hand in hand with SpaceX to investigate the incident. Kenny Todd, the leader of space station mission operations, repeated during the briefing that NASA is working "very closely with the SpaceX team."
During the test, and just prior to the loss of the capsule, Koenigsmann said SpaceX "completed tests with the Draco thrusters ... We fired them in two sets, each for five seconds, and that went very well."
"While it is too early to confirm any cause, whether probable or crude, the initial data indicates that the anomaly occurred during the activation of the SuperDraco system," Koenigsmann said.
NASA's involvement in the investigation stems from multiple factors, most notably that SpaceX is developing the capsule with funding from the agency. In 2014, SpaceX won a $2.6 billion contract from NASA to build Crew Dragon, with the promise of future contracts to fly as many as four astronauts at a time to the space station.
Commercial Crew is NASA's solution to once again launch U.S. astronauts from U.S. soil. Since the end of the Space Shuttle program in 2011, astronauts have flown aboard Russian Soyuz, at heavy cost per astronaut. NASA's new program is competitive, with contracts up for grabs for Boeing to win with its Starliner capsules and SpaceX with its Dragon capsules.
The comments from Koenigsmann and Todd came ahead of the next cargo mission to the International Space Station, which will fly on a Falcon 9 rocket with a SpaceX Cargo Dragon capsule. While there are similarities between the Crew Dragon that was lost and the Cargo Dragon, there are a few key differences, such as that Crew Dragon is both taller and heavier than the cargo version. Additionally, the SuperDraco engines that Koenigsmann mentioned are only on the crew capsule, not the cargo one.
Both NASA and SpaceX are confident that Cargo Dragon is safe to fly.
"We feel very comfortable in moving forward with this particular mission," Todd said.
"Please keep in mind that this is still very early in the investigation. The investigation is by both SpaceX and NASA. Both teams are carefully reviewing the telemetry data and all the data that was collected during that test: High speed imagery, telemetry, and it will include eventually analysis of the recovered hardware from the test.
Priority at this moment is to allow the teams conduct their analysis before we come to any conclusions. That said, here's what we can confirm at this point in time.
At the test stand we powered up Dragon and it powered up as expected. We completed tests with the Draco thrusters – the Draco thrusters are the smaller thrusters that are also on Dragon 1, the Cargo Dragon. We fired them in two sets, each for five seconds, and that went very well. And just prior before we wanted to fire the SuperDraco there was an anomaly, and the vehicle was destroyed.
There were no injuries. SpaceX had taken all safety measures prior to this test, as we always do. And because this was a ground test we have a higher amount of data, or a huge amount of data, from the vehicle and the ground sensors.
While it is too early to confirm any cause, whether probable or crude, the initial data indicates that the anomaly occurred during the activation of the SuperDraco system. That said, we're looking at all possible issues and the investigation is ongoing.
We have no reason to believe there is an issue with the SuperDracos themselves. Those have been through about 600 tests at our test facility in Texas and you also know about the pad abort, we did some hover tests, so there was a lot of testing on the SuperDraco and we continue to have high confidence in that particular thruster.
As you mentioned already, Crew Dragon is built upon the heritage of Cargo Dragon but these are different spacecraft. Dragon does not use SuperDraco and its propellant systems. We have looked at all of the common links between the two spacecraft. We viewed that and we approved them for flight by both teams, NASA and SpaceX, in common.
Also want to point out that for CRS-17, that spacecraft has flown as CRS-12 already, which means it has been test very well – like, flight, basically.
Again, I'd like to reiterate the anomaly occurred during a test, not during a flight. That is why we test. If this has to happen, I'd rather it happens on the ground in the development program and I believe what we will learn from this test will make us basically a better company and Dragon 2 at the end a better vehicle, a safer vehicle. And so we will take the lessons learned from this and I'm convinced this will help us to ensure that Crew Dragon is one of the safest human spaceflight vehicles ever built."