@mross
Will the Egyptian authorities be able to analyse the FDR and CVR or does this need the expertise of the units' manufacturer? If the French are not given access directly ...
The Egyptians have stated earlier that the recorders would be read by the Egyptian authorities. Unless the damage would be too severe. Then the recorders would be sent to a 'foreign' specialist/manufacturer. Which is normal practice in cases like these.
Also note that the BEA and other parties are represented in the investigation. These parties will know. But in the case of AirAsia, in spite of explicit requests from the BEA, for instance the CVR data was not published 'en plein publique'. So lessons learned are not shared in full, which of course detracts from the value of a safety investigation.
My impression is that ACARS information would not have been adressed by the parties involved if they had not been 'leaked' earlier. Also, I think that modern day requirements for earlier public disclosure of known (and checked) and unknown facts is something that cannot be ignored by authorities. The case of MH370 has shown what it does to the credibility of authorities if they do not act properly in this respect. If the authorities do not publish these fact, then they run the risk of information being leaked that contains information that should not be leaked, like for instance privacy and such details.