Emergency spacewalk News
The failed relay box was installed in the space station truss March 30 during a spacewalk by Whitson and Expedition 50 commander Shane Kimbrough.
Expedition 51 Commander Whitson and Flight Engineer Fischer will replace a critical computer relay box that failed May 20.
The multiplexer-demultiplexer (MDM) data relay box on the S0 truss failed on Saturday morning.
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