Wow - good to see someone of your expertise here, GregP.
So what were the "designed operational profile(s)", was the Army operating the aircraft within that/those profile/s and, if yes, what was the cause of the "crash" to which you referred? (I confess that the word "crash" is not one that I usually associate with experts in aviation.)
The information that I have suggests that the airframe was designed around a bunch of assumptions that were not satisfied in real operations. If an aircraft is designed on the basis of an assumption that it will spend only e.g 10% TIS at low level in turbulence, but the reality is that the aircraft spends e.g. 50% TIS at low level in turbulence, the outcome seems pretty obvious.