Nice update today in the main ESA website on the 27 February in-orbit replacement of a faulty water valve in the Columbus lab’s Thermal Control System, which cools all the equipment and scientific payloads in the orbiting research module:

ESA astronaut Paolo Nespoli removes failed valve in Columbus 27 February 2011

ESA astronaut Paolo Nespoli removes failed valve in Columbus 27 February 2011

A joint effort is combining sophisticated engineering analysis on the ground with old-fashioned hands-on work in space after ESA astronaut Paolo Nespoli undertook the complex installation of a replacement water valve in ESA’s Columbus science laboratory.

Full article via ESA