Hey Jolly,
I'm not qualified to do any sort of study really
I'm a 73 pilot with an interest in all things aviation safety. This is just this months idea, next month I'l probably be looking into LOC or Fatigue or something similar. A while back I looked into hot brake incidents. (in my defence I often drink beer while researching ). My plan is to look at all the part 121 accidents between 1980 and 2009 and determine the % that involved jump seaters and then figure out if that % is too high. It would never stand scrutiny from anyone knowledgable in surveys etc, it's just something I do to keep me learning/thinking. Feel free to jump onboard
