Which helicopters do you enter and in Singleplayer or Multiplayer?
When you crash, the game will most of the time generate crash dumps and logs that can be analyzed to find out why it crashed.
.RPT logs + dump files can be found in %localappdata%\Arma 3\. Take note of the date your game crashes and compare it with the date stamp of the dump files.
By placing them in a compressed archive and dragging and dropping it here, you can upload them for the developers.

maybe you can take a look here https://community.bistudio.com/wiki/Arma_3_Unusual_process_exit to see if your error is included in that list and try out the proposed fixes