NASA declares SLS tanking test a success

NASA says it completed all the objectives of a Space Launch System tanking test Sept. 21. The day-long test at Kennedy Space Center’s Launch Complex 39B involved filling the SLS core stage and upper stage with liquid hydrogen and liquid oxygen propellants. The test was designed to confirm that changes such as replacement of seals and a new loading procedure would prevent hydrogen leaks seen in the previous launch attempt Sept. 3. Another hydrogen leak took place during the pre-press test on a second, smaller liquid hydrogen line, with concentrations as high as 5%.

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