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.

NASA Television will air a news conference at 1 p.m. with Space Shuttle Program Launch Integration Manager Mike Moses and STS-127 Launch Director Pete Nickolenko. Watch it live at NASA TV.

After having successfully testing for leaks, the road has been paved for a shuttle launch in 10 days, weather permitting.

The shuttle was delayed twice last month due to the hydrogen leaks but Engineers at NASA believe this time they have the problem corrected and the test performed today verifies that.