SpaceX has finally successfully completed the static test fire on the Crew Dragon spacecraft, following an explosive failure earlier this year.
The drone is intended to fly astronauts to the International Space Station, but a "series of engine tests" at Cape Canaveral, Florida, earlier this year threatened these ambitions.
"Initial tests were successful, but the final test resulted in a test-holder anomaly," the company said at the time, after a leaked video appeared show the spacecraft exploding in flames.
Subsequent joint investigation between SpaceX and NASA found that titanium fire was the likely cause of the explosion.
It was a frightening moment for the engineers involved in the design of the capsule, designed to safely carry human passengers into space.
The problem was not repeated during Wednesday's test, which comes before another test of the spacecraft's escape systems.
Engine tests started with two burns, lasting one second, for two of Draco's six Drag crews, used to maneuver and control the direction.
Following the tests of Draco's attackers, the team then completed a nine-second test fire on Crew Dragon's SuperDraco engines, designed to accelerate the spacecraft beyond its rocket boost in the event of a shutdown.
"In April, during a similar set of engine tests, the aircraft suffered an anomaly that led to the explosion and loss of the vehicle," NASA said.
"In the coming months, an anomaly investigation team comprised of SpaceX and NASA personnel determined that a sip of liquid fuel in the high-flow helium pressure system unexpectedly triggered a titanium ignition event, resulting in an explosion.
"Based on the findings of that investigation and months of testing, SpaceX redesigned system components to eliminate the possibility of entry into the high-flow pressure system."