I don't know if you read french? I do, and that's simply my reading of the CVR transcript around 2 h 13 min 30.
The BEA transcript is not :
Ça ne servira à rien
The BEA transcript is :
(* fera rien)
on (fera /verra) rien
with the BEA notes :
( ) Words or group of words whose meaning has not been identified with certainty. The “ / “ symbol gives various proposals.
(*) Words or groups of words not understood