News
Second Discovery tanking test Following Space Shuttle Program management discussions this week, a plan was laid out today reflecting how the program will move toward the STS-114 Return to Flight launch.Preparations are under way for a tanking test no earlier than the week of May 15 to continue troubleshooting two issues that arose during another tanking test on April 14. Engineers are evaluating the liquid hydrogen sensors in the tank that gave intermittent readings during last month`s test. These sensors serve as fuel gauges to notify the Space Shuttle Main Engines to shut down when propellants reach a certain level in the tank. This is critical in the safe operation of the main engines. Engineers are continuing to evaluate a liquid hydrogen pressurization relief valve that cycled more times during the tanking test than is standard. This valve opens and closes to ensure the liquid hydrogen stays at the correct temperature.
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