There is a well known story about 22 squadron SAR in the sixties, when they still had the Whirlwind 10. One of the pilots posted in was a failed fast jet pilot, and he was disgruntled about being landed with Helicopter flying. He took out his frustration on the poor old whirly, by putting the old girl into a power dive, exceeding VNE. Several other crew members knew he did this, but nobody reported him.
The inevitable happened, and he hit retreating blade stall, crashed, and if I remember correctly. killed his Navigator, and put himself in a wheel chair.
There was much made of the fact that not one of the other crew members had reported his actions.