Misc

Space Shuttle Endeavour Is Leak Free and Ready for Launch

NASA said the fueling test that was conducted on the shuttle just hours ago, uncovered no 'worrisome' gas leaks. At about 9 a.m., the liquid hydrogen tank was 98 percent full and the "topping" mode began. A vent valve at the top of the hydrogen tank began cycling, as planned, to disperse excess gaseous Hydrogen through a vent system that carries it safely away from the launch pad. At that point during two June launch attempts, a gaseous hydrogen leak was detected outside the Ground Umbilical Carrier Plate, or GUCP, where the vent line is attached.

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