Having worked for Bell as a Maintenance Manager/Product Support Manager for three years I can attest to one thing. Bell has not designed a new military helicopter from the ground up for almost thirty years. The last helicopter Bell was contracted for by the military was the UH-1. Every other military and some civil helicopters were a derivative of that model. Bell will also use preexisting parts from one helicopter and install it on another helicopter model. If you don’t believe me just check your parts catalog and you will find a mixture of three digit numbers ranging from 204, 205, 206,209 and upward. The later the model the more different prefixes you will find. Another point is that if the part performed well on the helicopter it was designed for it would most likely operate well on its’ new installation. However if the part was bad it would still be bad. This was proven on the 214, which was cobbled together for the Iranian Army. It was poorly tested and poorly constructed and it had a lot of bad 205 structural parts.