You are quite right Shy....but there would have been some very unusual forces for sure....and the question was actually about the stress damage to the gearbox mounts.
My question was not clear enough upon re-thinking it.
There was the third crash where a main blade did let go....and I cannot recall if that gear box departed following the one blade.
I am looking for that video....but am having trouble remembering where that occurred.
Found it......it appears the gearbox stayed with the aircraft but the video is very short and the aircraft falls behind a building immediately after the blade separates and the rest of the rotor head departs.