It’s unclear if NASA got what it needed to proceed with launch
After three previous aborted attempts, NASA successfully fueled its new massive deep-space rocket, the Space Launch System, for the first time on Monday — completing a critical milestone ahead of the vehicle’s first flight. However, there was a shadow over the achievement. The fueling was part of an elaborate dress rehearsal that ended 20 seconds earlier than NASA had planned, and it’s unclear if the agency got all the data and practice it needed to proceed with the rocket’s debut launch.
With the SLS standing upright on its launchpad in Kennedy Space Center in Florida, NASA engineers and flight controllers filled the vehicle with its ultra-cold propellants on Monday, just as they would on a launch day. With all the SLS tanks full, the flight team counted down to a simulated liftoff time, with the plan to stop the countdown at roughly T-minus 9 seconds. Instead, the team stopped the countdown short at T-minus 29 seconds due to a hydrogen leak.
Plans changed during the test. The simulated liftoff was delayed by hours due to a number of issues that flight controllers worked on throughout the day, including a hydrogen leak. Ultimately, flight controllers opted to skip the stop and turnaround at T-minus 33 seconds and just proceed down to T-minus 9.3 seconds,
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