So I've been trying to complete this quest any way possible, and he either stands next to his vertibird doing nothing endlessly or he runs into a random room and just explodes. I've tried only disarming the bomb, only taking out the sniper and stopping the engineer from knifing him and every combination of them, even when I stop all 3 he just runs into the same room and explodes. Google is not helpful, anyone have this happen to them? Any ideas on how to fix it, I guess I could just use a console command to force complete the quest.
Edit: Nevermind, just did it again only stopping the sniper and it worked suddenly. Tried to delete this post but nothing happened.