Originally Posted by
xollob
There are lots and lots of possible outcomes other than the FO.
Decompression incapacitation (is a320 O2 generators in cabin, perhaps wreckage can establish if they had activated). Perhaps forgot to put mask on before initiating descent, planning to not open door till MSA or 10k as per SOP (if that is SOP) captain banking on door to come in might not be SOP to come in in a decomp. If more genuine footage does materialise then state of cabin can help asses if rubber jungle was down.
Medical incapacitation of FO
Door mechanism not working - why haven't they released CVR of door alert opening tone ?
Captain not knowing correct code for re-entry ?
Aircraft doing an uncommanded descent as per other recent A320 ?
Perhaps an electrical situation which reset the MCP modes and altitudes (I dont know what MCP default alt is on airbus when powered up)
A/P disconnect
Defect Situation that threw a/p out
Coffin corner
Window blow out
Another technical defect
Highly stressed FO due to a distraction, not hearing door re-entry (hearing goes first under stress)
Even though there are relatively few undisputed facts known so far, they are already sufficient to cast doubt on at least some, if not most, of those scenarios.