I'm guessing you are flying an R22/44 with a teetering rotor head.
In the RFM it says:
"Never push the cyclic forward to decend or terminate a pull up. This may initiate a low-G condition which may result in the main rotor blade striking the cabin . Always use the collective to initiate a decent".
This is why many pilots prefer a helicopter with a fixed or fully articulated rotorhead.
Last edited by FLY 7; 27th Apr 2013 at 08:02.