I have had a few dreams about this stuff. Yep, I have dreamed about crashing. Something that has happened a couple of times is that I ironically crashed near my house and I was confused as a rescuer instead of being on the plane. I also have dreamed of dialing 911 on my cell phone to tell them about the crash. Wouldn't that be a helluva call.
Ironically, I can't sleep much on planes. But if I have trouble sleeping at night, if I think of flying, I can go right to sleep.