Leftseat, "in the cabin" was something that you assumed, right?
Well. I have just found a German source which says: " Von Überlebenden wurde nichts bekannt." [ZDF, heute dot de, 05-19-2016]
In English: "Officials haven't found yet one survivor."
Under Investigation. That might be a hope for your assumption, that there could have been a PNF in the cabin who survived it and who is able to write down some details.
I know that there are PNFs who didn't participate in that flight. So, imho,
Air France is able to contribute/to help with some details. They also know the route.
Gabriel, I wish that we could "meet" (online) on a happier occasion. That should be possible, one brighter day.