Aviation Investigation Report A98H0003
2.2.3 Survivability of Quick Access Recorder Information
As is typical with most quick access recorders (QAR), the QAR in SR 111 recorded significantly more data than did the FDR. The QAR tape was damaged beyond use; therefore, no information was available from this potentially valuable source. The number of parameters that would have been recorded on the SR 111 QAR exceeded by fourfold those that were recorded on the FDR. Some of those parameters included temperatures in some of the hidden areas and electrical voltages of various aircraft systems. Such information, if stored on the crash-protected FDR, would have been useful to the investigation by providing significant clarification regarding the ignition source and propagation of the in-flight fire.
Modern digital FDRs are technically capable of recording all QAR data from various aircraft sources in a crash-protected environment; however, there is no regulatory requirement that modern FDRs record QAR data.
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