Yeah no problem. It actually turned out to be due to modded objects that conflicted with the aircraft such as guns and clothing. It's a little frustrating sometimes, as the only safe way to use aircraft is to play without mods. I also haven't really been playing unturned lately due to college, so I don't necessarily remember all too well which clothing/gun pack conflicted. Maybe I'll hop on this weekend to try and figure it out.
Ah, sorry about that. The game expects items/clothing to be on a collision layer that does not interact with vehicles. I will make a note to see about adding a warning for this. When switching to third-person the modded items/clothing would be re-enabled and collide with the vehicle.