ORIGINAL: wojtek
in the same way you could lay the blame on the radio impound, or field controller for signing out that channel ... either way, its a difficult situation, and worse of all it is difficult for the families of the dead and injured [

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This is true. And most certainly, in an American court(I am only familiar with UK and US laws, and I'm not a lawyer, either...no idea of Hungarian law and attitudes) it would be litigible. If there was an impound, and the impound was aware of the interference issue, most certainly, they WOULD be liable also...
But keep in mind this is speculative...I have not heard straight from any horse's mouth that there was previous interference, it's second hand. But most certainly, if it is true, it changes everything. One would be just an accident, the other would be flying with a known problem.