Does Flight Data Recorder consists of performance data or both of them are recorded separately. Do we also have flexibility when to start recording performance data like Records the initial conditions at the cruise ,climb/des intersection, or current conditions

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    $\begingroup$ Do you have any reference to a "performance data recorder"? Typically I've heard of Flight Data Recorder (FDR), Cockpit Voice Recorder (CVR), and Quick Access Recorder (QAR or QDR). Are you referring to the QAR? $\endgroup$
    – Ron Beyer
    Mar 17 '20 at 16:00
  • $\begingroup$ @RonBeyer Yes I think QAR , I searched and found most of them use QAR to store performance data $\endgroup$ Mar 18 '20 at 20:35

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