Roscosmos didn’t announced specified data on Progress M-27M cargo vehicle accident on Friday, Commission well need more time, – space agency press office reports.
“Special Interdepartmental commission investigating accident of Proton M-27M launched from Baikonur spaceport on April 28, 2015, goes on working, final conclusions will be presented later”, – official message says.
Soyuz-2.1a modernized booster with Progress m-28M cargo vehicle was launched from Baikonur spaceport on April 28. Thevehicle separated from the booster’s third stage off-nominally, the vehicle entered unscheduled orbit spinning at that. The docking on the vehicle with the ISS had to be cancelled. All efforts to take control over the vehicle were a failure: Progress started uncontrolled descent. On May 8, 05.04 progress M-27 ceased to exist above the central region of the Pacific Ocean.
According to the preliminary data already presented by Roscosmos Progress M-27M was lost because oxidizer tank depressurization and further Soyuz-2.1a booster 3rd stage fuel tank depressurization. It was the commission to find out depressurization cause.
To determine the nature of the cause additional modeling and a series of experiments on the premises of aerospace industries were needed.