As you go thru life...you grab onto wee bits of wisdom as you go.
Remember the Bell Huey series history of shedding tail feathers...starting with entire tail booms and working its way finally to the 90 degree gear box and Tail Rotor and you will see where it was easy to come to that view of things.
The early model Cobra's were notorious for that. They killed more pilots than did the Vietnamese.
Fort Rucker lost two Huey"s in one day to lost tail booms. They then did a Mod that beefed up the mounting bolts and structure where it all comes together.
One of the disadvantages to a very large fleet of relatively same aged aircraft is when problems are discovered it can affect a fair number of aircraft at about the same time.
There was a GOM operator of 206's who lost two aircraft the same day due to transmission mount failures....so it happens in the civilian world too.
http://www.vhpa.org/stories/million.pdf