Service Module Cooling Loop Fails

NASA Space Station On-Orbit Status 26 March 2005

"In a late change to their schedule, Sharipov and Chiao today replaced the #1 pump panel (4SPN1) of the Service Module (SM)'s internal cooling loop 2 (KOV-2). The panel failed early yesterday morning, causing a switchover to pump panel #2. Rather than isolating the failed pump, the entire 4SPN1 panel was replaced, to mitigate any contingencies from the thermal loop during EVA-13."

NASA Space Station Status Report 25 March 2005

"Early today, a thermal control loop panel in Zvezda that provides cooling to the Pirs airlock failed, and its backup system was activated to provide the necessary cooling. There are two circulating pumps associated with each panel. Both pump panels are needed to provide adequate backup capability for the spacewalk. The crew will troubleshoot the pump panel early Saturday, and replace one or both of the pumps in the degraded panel."

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This page contains a single entry by Keith Cowing published on March 26, 2005 7:01 PM.

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