Thanks for all reply`s
Just to make this clear. This is not anything I had part in, but something reportedly and most likely has happened to a machine in a company. Procedures where obviously followed, but only to the extent of and as far as the tech log is concerned. Nothing else where done accept maybe some inspections.
The result was a fatal accident , and two person`s lost their life, most likely because of this.
This helicopter accident happened back in 1992. And The main rotor of this helicopter was found some distance away from crash site, and looked like a complete unit, accept from some bends and damage on one of the blades, otherwise intact, and half of the mast with the pitch links where also on but had signes as they where twisted and had cut of and sheared of due to something that seems like a sheared swash plate.
The rest of the wreckage has signs of hitting the ground vertical on the nose.
No swash plate was ever found. The pilot was very experienced over 10 K hours. There was talk about mast bumping but, my source says this is not the case. Due to how the main rotor and mast with pitch links looked like. This aircraft had been trough a test flight earlier, and this is where things start to get strange.
The question is, can too high NR during an autorotation or governor failure up to 130 % NR on the 206 make damage to a swash plate, and make it shear?
again, expert opinions are welcome.