Russia Grounds Mi-8 Helicopters After 2 Crashes Kill 4, Injure 3
Two Mi-8 helicopters crashed on Thursday morning in Russia within four hours. Three pilots were injured in the first accident and four were killed in the second one.
The first Mi-8 belongs to the military and it suffered a reduction gear problem in the tail rotor.
The second Mi-8 belongs to Argo airline. The helicopter was performing an inspection flight over a pipeline.
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