Okay, this is totally my fault for applying Realistic Handling before I complete the damn storyline, making the chopper crash 100% after the RPG hit no matter what due to dramatically changed physics.
I considered swapping back the files just for this one, but seeing I've been through it at least 6 times for no good reason I think I can't take it anymore.
http://gtasnp.com/31417Help much appreciated, and cookies will be served.