Kev writes:

Hmm. Since indeed very recently an airplane over Greece (?) lost
both pilots, it's definitely not an impossiblie scenario. If there
isn't a procedure in place (and apparently there isn't, since that
plane crashed with a poor flight attendant in the cockpit), why the
heck not?

The Helios accident raises the question of whether or not securing the cockpit
in such a paranoid way is worthwhile. Which is more likely: pilot
incapacitation or hijack? It's an interesting question. If you protect
against one, you leave yourself open to the other.

The Helios flight crashed because nobody could get into the cockpit until the
engines ran out of fuel (which shut down electrical power and unlocked the
cockpit door), by which time it was too late. The flight attendant probably
could have landed the aircraft with radio assistance.

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