Flight Data Recorder (FDR) & Cockpit Voice Recorder (CVR)

Solid-state Flight Data and Cockpit Voice Recorders use modular,
crash-survivable memory units for protection of the solid-state flight
data and cockpit voice recording memories. The memory unit retains
the most recent 25 hours of digital flight data and timing information
for the FDR; and the most recent 30 minutes, or 2 hours, of audio,
digital and timing information for CVR.

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