The red crew has departed the launch pad and is now outside the designated danger area surrounding the pad. The technicians entered the zero deck, or base, of the mobile launcher and tightened several bolts to troubleshoot a valve used to replenish the core stage with liquid hydrogen which showed a leak with readings above limits. The launch team will check the valves to determine if the leak has been fixed and resume launch countdown operations.

Red Crew Departs Pad