Heavy Captain
spmd11:
I don't normally speculate (I'm a heavy Captain for a US airline with a lot of overwater experience in an ac like the 777), but I will add this, with CPDLC, HF, VHF, ACARS and SATCOM, I'll find some way to get a message out under duress.. especially CPDLC, for it's a couple of key strokes.. would take me.. 5 seconds, tops
my theories fall into these two areas:
1. Hi-jack (terrorism from outside or crew)
2. Hypoxia event leading to incapacitation of all life on board.. (has happened in the past)
Could you please elaborate on Hypoxia (or for that matter aircraft air supply suddenly contaminated with some kind of life ending substance). I believe this is the only angle that has not been debated to death on this forum.