I don't know…
From what I see, the Helo should have seen the plane before impact and at least tried to evade…but it doesn't appear that it did…
so:
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unmanned and flown remotely
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Pilot, copilot intentionally flew it into plane. I would think the instructor pilot could have taken control if it was just the Tranny trying to crash…
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CCP or other bad actor was able to backdoor the avionics and take control…
Reported story isn't making sense…