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Turn on NASA TV and watch the shuttle landing. The shuttle had some minor technical details before landing. It is looking good.
Turn on NASA TV and watch the shuttle landing. The shuttle had some minor technical details before landing. It is looking good.
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There was one small glitch in the pre-landing check out. One of three Auxiliary Power Units (APUs) in Discovery's rear compartment has a small leak - about six drops per hour. The APUs power the hydraulic pump, which controls some of the systems needed for landing, such as the rudder/speed brake and the elevon. Flight controllers are not sure whether the leak is hydrazine fuel or the nitrogen that is used to pressurise the fuel tank. A hydrazine leak would be more serious than a nitrogen leak. Before the de-orbit engine firing, Discovery turned on that APU and it appeared to be working fine.