Space Shuttle Endeavour has been grounded yet again by the same gremlin that kept it sitting on the launch pad last week: a leaking gaseous hydrogen venting system on the external fuel tank. That system is a line carrying vented hydrogen away from the shuttle to a flare where the hydrogen can be burned off safely. When the problem initially occurred during tank-filling operations June 13, NASA tried using a fix similar to the one that solved a hydrogen line…
Space Shuttle Endeavour Sidelined For Weeks By Persistent Hydrogen Leak In Vent Line From Fuel Tank
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