This is not my area of expertise, but some of the accidents I have seen on Air Crash Investigations on TV look avoidable like the one where the pilot let his kid fly the plane. When the co-pilot pulled it out of the spiral dive he just keeps hauling back on the stick until it stalls, it seems like some times with out the auto pilot they cannot cope. Actually I think the co-pilot may have stalled it twice wouldn't you think a look at the AH might be the way to go?.