Baston:
You prove my first point quite well. You believe you are correct yet there are only two apostrophes in the entire portion you quoted. In both cases they are used in the possessive, ("pilot's" and "crewman's" - since they both own their own heads).
Now, if this is your level of comprehension, (not to mention your ability in debate), I'd suggest that your arguments here are barely worth reading. I'm almost surprised you didn't demand that I capitalize the word "pilot".
Please, answer a direct question for me. Since it is clear that there is a portion of the flight that begins around the change of waypoint and relies on factors that no-one has been able to determine to date, is it possible that something other than two, (possibly three), experienced airmen flew, willy nilly into a hill that may or may not have been obscured by cloud?