Space Station Malfunction Prompts Shutdowns

One of two coolant systems aboard the International Space Station malfunctioned late Saturday, triggering alarms and extensive power shutdowns to keep critical systems from overheating. The apparent failure of an ammonia pump in coolant loop A forced flight controllers to shut down two of four stabilizing gyroscopes, used to help control the space station’s orientation, one communications channel and several computer control units. The astronauts also installed jumpers between the Russian Zarya propulsion module and the U.S. segment of the lab complex to maintain proper cooling. More

(Source: New York Times - Aug 1)