The BEA says:
last radio exchange between the crew and Brazilian ATC occurred at 1 h 35 min 15 s. The airplane arrived at the edge of radar range of the Brazilian control centres, at 2 h 01, the crew tried, without success for the third time, to connect to the Dakar ATC ADS-C system,
No ATC messages were received or transmitted by F-GZCP. Only three attempts were made to connect up to the Dakar centre ADS-C system and were recorded on 1st June at 1 h 33,
1 h 35 and 2 h 01.
What was the last known crew action? At 2h01z or at 1h35Z? It seems that during the emergency initiated at 2h10z the crew took no action, what leads to the possibility of crew total incapacitation (depressurization, or any gas like CO???). Its a possibility to be investigated? This could explain why the flight did not any evasive action to the weather conditions and also the way it impacted the water. This is also coerent with no preparation to any emergency.