Originally Posted by
etudiant
This reminds me of the discussion about securing cockpit doors before 9/11. The objection was that a locked door could cause structural issues if the cabin were decompressed during a hijacking.
Funny how quickly that got fixed subsequently....
Not really, a locked door definitely works at stopping people getting into the cockpit.* I've yet to see any reliable figures for the percentage of GA fitted with FLARM to be able to estimate a likely reduction in mid air collisions and without that who's to say it's the best use of a limited budget?
*Even if that would be a good thing, see German WIngs 9525