Seat Belts and Life Jackets
Certainly possible scenarios I believe...
What about 'nobody of the passengers/cabin crew was aware that there was trouble until shortly before the impact with the ocean'.
Do we know whether everything was ok in the cockpit? What happens if aircraft automatically changes to alternate law and pilots do not overtake command (because they are not able to do so for whatever reason)?
Can these things be ruled out with the information we have?
WB