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Message: <blockquote data-quote="lkdood" data-source="post: 4179873" data-attributes="member: 92282">update:Red Team Checks out MLP Pressure ValveSun, 15 Mar 2009 07:25:23 PM GMTA "red team" has been dispatched to the launch pad to adjust a pressurization valve on the Mobile Launcher Platform, or MLP. The team of technicians and safety personnel are accessing a panel inside the MLP to increase the pressure of helium that feeds to a "gap" area between the external tank and shuttle. This area where liquid hydrogen and liquid oxygen lines run from the tank to the shuttle, is purged with helium to prevent the formation of ice and the accumulation of gaseous hydrogen and oxygen. Helium does not freeze in the presence of super-cold hydrogen.  The helium level was on the lower side of acceptable limits, and the red team will adjust the pressure to create the proper margin.   This issue will not interfere with today's launch attempt.</blockquote>

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