Work in progress: Shuttle managers have decided to delay the start of the STS-103 launch countdown by at least 24 hours while engineers evaluate a dented main propulsion system hydrogen line found during closeout inspections of Discovery's engine compartment. A final decision on whether or not the line must be replaced is expected tomorrow. If the line requires replacement, it is anticipated that the work would postpone launch by a minimum of several days. The four-inch diameter line carries liquid hydrogen fuel for the Space Shuttle main engines.
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