The Manual on the 407 prohibits these manouvers, so I'm not surprised that the Bell guys condemned it.
The pilot may be a highly skilled aviator, but what did he intend to prove with these manouvers? To show how good he is.......?
If it is indeed true that the helicopter was rolled and looped, one can only but wonder if the CAA approved the manouver?Permission is required from the CAA when any manouver, conducted or performed outside of the normal category of operation is intended.
If it was my helicopter, I would fire the pilot immediately, as irrespective of what he (the pilot) or anyone else says about the manouvers, that no G's were pulled etc, one will never know.
What if damage was done, and something goes wrong in the future? Who is to blame then???
I would say that it is nothing other than irresponsible!