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NASA Considers Space Walk to Fix Discovery Heat Insulation
U.S. space agency officials are considering whether astronauts aboard the space shuttle Discovery need an extra space walk to make repairs to the craft.
Mission controllers say they are comfortable that Discovery's protective heat tiles are in good shape for landing.
But they remain concerned about the gap filler - a material between and underneath the tiles that seals them and reduces friction, protecting the orbiter from the searing heat of re-entry into Earth's atmosphere.
The gap filler is ________ in some areas, and shuttle lead flight director Paul Hill says engineers are trying to come up with some answers.
"We have a team of folks that are working aggressively at options to go and make that gap filler safe if we decide it is an issue," he said. "And we have a separate team of folks that are off looking at aero-heating and the effects of leaving those gap fillers in place and protruding. We expect to have final results on aero-heating and the decision on whether or not to do anything about the gap fillers on Monday."
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