Journal of Accident Investigation
Journal of Accident Investigation
Journal of Accident Investigation
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JOSEPH GREGOR<br />
Figure 4. FDR on-key/<strong>of</strong>f-key data, FDR(n), where “n” represents the subframe reference number (SRN) corresponding to the number <strong>of</strong> seconds since<br />
the FDR first began recording. A “1” indicates that the microphone was found keyed-on at the sample time.<br />
Figure 5. CVR on-key/<strong>of</strong>f-key data, CVR(n), where “n” represents the sample number. The data in this figure were sampled at a<br />
1 Hz rate to facilitate comparison with FDR(n). A “1” indicates that the microphone was found keyed-on at the sample time.<br />
48 NTSB JOURNAL OF ACCIDENT INVESTIGATION, SPRING 2006; VOLUME 2, ISSUE 1
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