Im sorry but im making a valid well educated analysis here but no one is able to understand it because its a bit complicated for me to put in text.
Yes, Mast bumping is typically a thing which happens under power, so is typically, severe at the top of the mast.
But this was not under normal power situation, as torque was lost due to an entire drivetrain component missing.
There have atually been quite a substantial number of number of military related incidents where the bumping has lead to cracked transmission cases.
But for commercial examples, N6181A, September 16 September 12, 2016 - mast bumping event on ground
"The inspector performed a limited inspection and noted substantial damage sustained to the main rotor mast and to the transmission system."
Now im sorry to offend anyone, my posts are meant to be informative. Is there any chance I can maintain an ounce of respect on here ? I resepct everyone else, why is there none available for me?