NASA's latest attempt to fuel its huge moon rocket for a countdown test was thwarted Thursday by a hazardous hydrogen leak, the latest in a series of vexing equipment trouble.
The launch team had just begun loading fuel into the core stage of the rocket when the leak cropped up. This was NASA's third shot at a dress rehearsal, a required step ahead of a test flight to the moon.and oxygen into the core stage of the 30-story Space Launch System rocket, but fell far short of the full amount. Liquid hydrogen is extremely hazardous, with officials noting that the systems had been checked for leaks prior to the test.
Technicians deliberately left the smaller upper stage empty, after discovering a bad valve last week. The helium valve inside theTwo previous countdown attempts were marred by balky fans and a large hand-operated valve that workers mistakenly left closed at the pad last week.NASA had been targeting June for the launch debut of the 322-foot SLS rocket. The empty Orion capsule on top will be sent on a four- to six-week mission around the moon and back.around the moon, planned for 2024.
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