my question pertains to the condition of dual hydraulic failure leading to law reconfiguration.
The NTSB report (eg page 90) states that there was hydraulic pressure despite the dual engine failure and so it wasn't an issue.
FDR data indicated that, during the accident event, all three (green, blue, and yellow) hydraulic systems were available ...
I know what the FCOM says otherwise but maybe Airbus knows more than we do. I wouldn't have turned down the offer of full hydraulics if were in Sully's shoes. Would you ?