NASA and SLS program managers have developed part of a forward plan for addressing the significant liquid hydrogen (LH2) leak that was observed during the Saturday, September 3rd attempt to launch the SLS rocket and the Artemis I mission from LC-39B at the Kennedy Space Center.
Under the current plan, teams will repair the liquid hydrogen umbilicals and perform a tanking test no earlier than September 17th with the Core Stage and Interim Cryogenic Propulsion Stage (ICPS) to verify fixes to the umbilical seals under cryogenic conditions before an absolutely no earlier than (and unapproved at this time) launch attempt on September 23rd.