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An obscure mechanism which caused three Space Systems/Loral-manufactured satellites, Telstar 14, Telstar 14R and Intelsat 19 to have solar array failures during their launches/deployments has finally been discovered. In an interview conducted in the space newspaper Space News (7 January 2013), John Celli, President of the US spacecraft manufacturer Space Systems/Loral, revealed that the eight-year-old mystery into why three satellites had major solar array failures had been solved by an independent investigation team. It found that it was inadvertent solar array pressurisation and exposive decompression that was the underlying cause.
Specifically, during the launch phase, the satellites' solar arrays had actually become pressurised relative to their ambient environment as the launch vehicle rose in altititude. This eventually led to an explosive event which damaged the array's deployment mechanism and structure. It was a manufacturing defect that was found to be the root cause including overly pinching the ends of the panels which would not let gasses vent from the honeycomb structure, and having insufficent bonding of the layers of the panel making it more susceptible to explosive depressurisation.