About ten years ago a Bonanza went down in the Spotted Bear River in Montana just outside of the Bob Marshall Wilderness. As I recall there were two on board and they were unable to escape from the cabin. They could hear the occasional vehicle on a road that followed the river. There was a rifle on board and were able to signal help from a passerby. The plane was out of site from the road but within hearing distance of a rifle shot.
As I remember now the cause was determined to be a couple of holes burnt in pistons attributed to the use of too low an octane car gas.


