"The letter, dated Thursday, also cited SpaceX's prior explosion in June 2015 while carrying cargo for NASA to the International Space Station. The Hawthorne space company led its own investigation for that launch failure. Under federal law, SpaceX is allowed to conduct its own investigation. SpaceX ... and other companies lobbied successfully to extend the law last year. The FAA oversees such investigations. The Congress members said the investigation responses raised "serious concerns about the authority provided to commercial providers and the protection of national space assets."
"Ten Republican Congress members led by Rep. Mike Coffman (R-Colo.) have sent a letter to the heads of the Air Force, NASA and the Federal Aviation Administration questioning whether SpaceX should be allowed to lead its own investigation ... Coffman's congressional district includes United Launch Alliance's headquarters. Many of the congressmen represent states where ULA has operations."
Keith's note: But wait. ULA did their own internal review when the first stage of the Atlas V delivering OA-6 Cygnus shut down early. Oops. H/t to Tim B.
"Per standard processes when a flight data item such as this has been identified, the ULA engineering team, along with our engine supplier and several government customers, forms a robust review team. The review team assessed all flight and operational data to determine direct and root causes and implemented the appropriate corrective actions for future flights. .. "We would like to thank our customers and supplier partners for their outstanding collaboration in the detailed review of this anomaly."