Launch on hold for troubleshooting, Spaceflight Now
“Shuttle engineers are trying pinpoint why one of four critical hydrogen fuel sensors failed a test late in the shuttle Discovery’s countdown Wednesday, forcing NASA managers to scrub the agency’s long-awaited return to flight.”
Part fails, delaying Discovery launch, Orlando Sentinel
“Two of the sensors malfunctioned April 14 during a test in which engineers fueled Discovery’s tank. However, the sensors worked properly during a second test of the same tank May 20.”
