from BBC
Prime Minister Francois Fillon told the French parliament that the cause of the plane's loss had still to be established.
"Our only certainty is that the plane did not send out any distress call but regular automatic alerts for three minutes indicating the Failure of all systems ," he said.
This is the first I have seen saying all systems. Previous reports listed several faults, not all systems. Granted, he is not an engineer but he must have been briefed by such.