I had a friend that died in a plane crash years back in a twin engine Cessna around Caledon Ontario.
He flew into some fog and probably did not pay attention to his instrument and hit some trees and landed in a farmers field and the plane was intact.
Six months later I was watching a Transport Canada on plane crashes on Discovery channel and my friend’s plane crash was one of the cases they filmed and in the story I found out when you hit trees or crash in a forest the horizontal branches on the trees are like spears and it will skewer you and that is what happened to my friend.
The investigators said that if the branch didn’t get him he would be alive to tell about it.
The plane that took off from Oshawa landed in a forest and I have to assume that this is how they met their end.
There are so many ways to die in a plane crash I wouldn't even try to list them. When an aircraft at flying speed, crashes into the forest, the aircraft usually starts to come apart.........shedding wings, tailplanes, engines, etc. If the fuselage stays intact and the impact loads were not too high, and there was no fire, people could survive. It is completely up to chance. It depends a lot on the type of aircraft, the terrain, the airspeed, and a lot of other things.