![]() ![]() Officials said they're still not certain why the valve cracked on the last flight. NASA wants to make sure if another valve breaks, Discovery and its seven-man crew will be safe. He said more tests will likely be needed. "There was just a sense of unease that we did not quite have the rigor that we typically expect for a question like this," Shannon told reporters late Friday night. But some of the test data were not available until late in the week and did not allow for full scrutiny, and a few small mistakes were found in the data. Shuttle program manager John Shannon said "we were really, really close" to approving the launch. One of those valves broke during the last shuttle launch in November. ![]() But extra tests were ordered for the valves that control the flow of hydrogen gas into the external fuel tank during liftoff. NASA originally hoped to send Discovery to the space station, with one final set of solar wings, on Feb. After that, the shuttle would have to get in line behind a Russian Soyuz launch with a new space station crew, and the next opportunity for Discovery would be after April 6. Officials said they believe they have a realistic shot at launching Discovery to the international space station before mid-March. The launch had been targeted for no sooner than Feb. NASA delayed the launch of space shuttle Discovery for a fourth time on Friday amid valve concerns, and managers are uncertain when the flight will take place.įollowing a 13-hour meeting at Kennedy Space Center, shuttle managers decided against launching next week.
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