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Sat, May 21, 2005

Shuttle Fueling Test Provides Data

Should Be Go For Launch On Schedule

NASA's Kennedy Space Center launch team conducted a fueling test Friday that produced good data for the engineers. Shuttle managers are confident that any issues can be worked out in time for the scheduled July launch. The team pumped more than 500,000 gallons of liquid oxygen and liquid hydrogen into the tank for the test before simulating most of the countdown checks.

"We got enough information from this test to come to some conclusions, and my feeling is this team will be able to work its way through this data and determine what the issues are," said shuttle program manager Bill Parsons, according to Florida Today. "Nothing I've seen so far" indicates a need to delay the launch, he said.

The test goal was to solve problems with sensors and valves that were discovered in an April test. The engine cutoff sensors worked correctly in the test after some wires and connectors were replaced that were suspected to be faulty. Intermittent readings from the sensors could have caused an early engine shutdown and an emergency landing in a real flight.

The problem with a pressure-relief valve cycling too often repeated itself Friday, leading NASA to suspect a diffuser that was made differently than ones that flew in prior missions. The replacement tank has the old style of diffuser. Tests with a new heater on or off produced the same results.
 
NASA will roll Discovery back to the Vehicle Assembly Building on Tuesday to swap tanks and solid rocket boosters. Discovery is scheduled to return to the launch pad in the middle of June for a launch scheduled between July 13th and July 31st.

FMI: www.nasa.gov

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