This has been happening for awhile now, I believe since one of the first 2.0 updates was applied. (It is still occurring after the most recent update).
When we (http://1stcavdiv.conceptbb.com/) have multiple users flying Hueys and engage AI targets on the ground with M-60s, rockets and mini-guns (weapon load-out does not seem to matter), several, if not all of the Huey users, will crash to desktop. This issue is reproducible and does not affect other fixed-wing or rotary (KA-50 and Mi-8 )aircraft.
Crash logs posted here: http://forums.eagle.ru/showthread.php?t=158899