Very valuable contribution by PJ2
@JCjeant:
The raw DFDR data will be one of those pieces
Although a legimate request, the RAW FDR data (translated into a readable format) will not give the answers.
The final BEA report is not based solely on FDR and CVR data.
System byte(e.g. FMGEC) is an used source but requires both Airbus as manufacturer specialists with in depth knowledge of the system and equipment.