Thanks Brian,
Well, the issue being discussed in the above references made, point to the retreating blade stall(or even Mach Tuck) as the start point;that may be the case in those examples. The core issue I had tried to place my understanding around is ' Control Margin'. The case I've quoted has the cyclic lateral movement achieving 100% of its possible travel. BO-105 issue as stated above may be a similar case- though I don't have sufficient information of the accident.
Thanks again anyway.