We lost a S-61N in the North-Sea in 1978 due to a spindle brakedown followed by a blade loss. They found helicopterparts on the seabed covering about 1 sq.km. due to domolation. 21 souls lost.
Another S-61N (Brazilian) actually flew into the sea due to severe vibrations in June 1997. The pilots lost control completely. The wreck was picked up from 800 meters depth. There are 2 theories:
-One blade abration strip came loose. The weight is 340 grams, but due to angle of speed it induces much, much more. Heavy lateral imbalance!
-Another theory is that on blade broke and lost approx. 1/3. This was found on the seabed about 100 meters from the wreck. The rest of the blades were twisted around the hub as they met the water.
2 of 20 lost their life.
Conclusion: NO
