If it didn't involve at least 150 fatalities and a major air carrier, the NTSB isnt going to spend any time trying to figure out the real reason of the accident.
They are the definition of the term "grand standers".
I was peripherally involved in a fatal accident (not in the airplane, but observed the results and assisted with the private investigation), and became totally disgusted with what the NTSB reported. It was a real travesty, and we (the flying public) learned nothing from this accident. The sad part is that there were things, in my opinion, that we could have learned.
If it's GA, it's pilot error. If it's air carrier, it's pilot error, and maybe Boeing's fault.
The rudder comes off an Airbus, and it's pilot error. Yeah, right.
Sorry, falling into the rant/rave category.
Signing off now for a glass of merlot,
MTV