Status Report

Space Station Module Cooling Failure Forces ISS into “survival mode” power-down

By SpaceRef Editor
August 6, 2003
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NASA Space Station On-Orbit Status 6 Aug 2003, NASA HQ

“By late last night, all systems affected by yesterday’s transition into “survival mode” power-down were fully recovered, and final cleanup steps are completed.  ISS is operating nominally on RS (Russian segment) primary thermal loop KOB-1, as investigation of the anomaly continues.  [The full recovery includes payloads such as EXPRESS Rack 1 (ER1), ER4, MSG (Microgravity Science Glovebox), MAMS (Microgravity Accelerations Measurement System), PCG-STES (Protein Crystal Growth-Single Locker Thermal Enclosure System) and the Ku-band receiver.]”

NASA Space Station On-Orbit Status 5 Aug 2003, NASA HQ

“Early this morning (3:14am EDT), during troubleshooting of the Service Module’s KOB thermal loops by MCC-Moscow, both KOB-1 & KOB-2 cooling loops went down.  The loss of cooling triggered an automatic load shed routine which powers off systems.  By 6:00am, cooling had been restored and all critical equipment repowered.  ISS is operating nominally on KOB-1.  [Communication with the crew, attitude contro, and pointing were never lost during the event.  KOB-1 was recovered almost immediately after it went down.  Status of KOB-2 is under investigation.  Suspected: KOB pump panel.]”

References

SpaceRef staff editor.