Thanks 206, I already read what Dick said, but the thing is that I knew in person both of the people crashed in Colombia and actually I got the pictures of the accident, the pictures shows that the tail boom went off because some stress in the lower part of the tail boom, just in the connection with the tail rotor guard, there wasn't a tree, and they never hit nothing with the tail, in the second accident, Iam not sure how an experimented pilot flying Robbies can get in a low G condition.
You touch the fact that he said something with the consideration and probably the knowledge of the factory, well I can tell you that the factory is going to say that the Colombian accident was because a main rotor low RPM, the thing here is this guys lost their tail boom before the low RPM.
And totally agree with you "Two fatal crashes so early in the life of a new helicopter is unusual", lets see what is the result of the USA investigation