Hi,
Blending the FDR traces with a discussion amongst (the three) pilots (actual) is in a way a bias.
Indeed....
FDR traces did not reflect what the pilots see on the panel (instruments)
The FDR is the only witnesses of their actions
In flight .. the pilots did not real-time access to the FDR
They do not have a printer showing a graph (similar to those of BEA) of the FDR data recorded (and same for the ACARS)