Congressional Investigators Warn of SpaceX Rocket Defects, Wall Street Journal
"The Government Accountability Office's preliminary findings reveal a pattern of problems with turbine blades that pump fuel into rocket engines, these officials said. The final GAO report, scheduled to be released in coming weeks, is slated to be the first public identification of one of the most serious defects affecting Falcon 9 rockets. The crack-prone parts are considered a potentially major threat to rocket safety, the industry officials said, and may require redesign of what are commonly called the Falcon 9's turbopumps. The National Aeronautics and Space Administration, they said, has warned SpaceX that such cracks pose an unacceptable risk for manned flights. A SpaceX spokesman didn't have any comment." ... "The final GAO report also will to delve into unrelated issues that threaten to delay initial launches of manned capsules by SpaceX and rival Boeing Co. Echoing conclusions of other studies by outside experts, GAO investigators have determined that both companies are likely to miss a 2018 deadline to start regular missions ferrying astronauts to the international space station."
Firm Commercial Crew Flight Dates Remain Elusive, earlier post