....but misses the point that no-one knows what may or may not have occurred in or to the aircraft at and after that point. There is therefore a failure to meet the rigorous test for a finding of negligence.
"Only in cases in which there is absolutely no doubt whatsoever, should deceased aircrew be found negligent"
As mentioned earlier, it is a question of language rather than aeronautics. No-one, from the Air Officers down, has been able to eliminate doubt.