Hi,
They have had plenty of time to design, build, test and certify such a system if they were half way serious. You have to ask, why haven't they ?
Well .. seem's a simple ... good plan and designs
Indeed they have now pleeeeeenty time for build and certify this genious design .... for the next crash at sea....
For the AF447 crash ... methink they had no fogiest idea of what they will find at the bottom ....
In fact ... they think they would never find the AF447 .....
Nevertheless I doubt any torpedo tube will be modified in the future .. for this kind of operation
BTW .. the FDR and CVR must be already on the metropolitan french soil now ......