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Analysis

Summary

The abnormally high collective pitch setting meant that the majority of the helicopter's forward cyclic control authority was required by the pilot to maintain level flight. The result was that, in response to the nose-up pitch, there was insufficient remaining forward cyclic control available for the pilot to recover the helicopter without also lowering the collective control. It appeared likely that the reported severe turbulence contributed to the helicopter's initial nose-up pitch.

 
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