MOSCOW, (BM) - The crashed Russian Su-57 was found to have at least four critical problems, learned BulgarianMiltary.com, according published report in Military Review of some russian experts.
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MOSCOW, (BM) - The engine of the Su-57 fighter, which crashed in the Khabarovsk Territory, was tested using special programs at maximum speeds, learned BulgarianMilitary.com, quoting the former commander of the 4th Army of the Air Force and Air Defense, Lieutenant General Valery Gorbenko.
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