Couldn't this whole thing have been prevented if Airbus had just used a toggle switch on the dash controlling an electrically-operated FSOV, like every Bell 206 has had since the beginning of time? Does any other Airbus product still use a manually-operated FSOV?
Or...for commercial ops can't we just prohibit (possibly inebriated) non-aviator passengers from sitting in a seat in which they can reach a critical control?