NASA Announced Late April 16
It will roll back the Space Launch System from the launch pad for various repairs, further delaying the rocket’s long-anticipated first launch.
NASA Did Not State
When the vehicle would go back from Launch Complex 39B, where it rolled out March 17, to the VAB.
Said it will hold a briefing April 18 about its plans.
The Agency Added
It would use the time in the VAB to repair a faulty helium check valve in the SLS’s upper stage
And A Hydrogen Leak Detected
Shortly after starting to load liquid hydrogen into the rocket’s core stage during the April 14 attempt.
It Was The First Time That...
Controllers had reached that stage of the countdown after technical problems halted two previous attempts before liquid hydrogen could start loading.