[moehoward]

I’m betting some kind of mechanical failure with collective/cyclic.

[precisionshootist]

It looked like the aircraft was tumbling rapidly. I’m betting main rotor blade failure. As in a large section or an entire blade sheared off leaving the remaining unbalanced three blades to cause the violent tumbling.

I’m not a pilot. Just my observation and casual knowledge of how helicopters fly.

Very sad, prayers to them and their families.

[mabarker1]

Not sure but if the chopper actually went down that fast I’m definitely leaning towards mechanical failure. The NTSB Crew will get to the bottom of the problem(s).

I read somewhere on FR that someone mentioned that the Engine(s) were making weird noises. Bad Fuel possibly?