The Flight Data Recorder records the last ______ hours of critical aircraft and flight parameters.

The Flight Data Recorder records the last ______ hours of critical aircraft and flight parameters.

• A. 12 Hours
• B. 25 Hours
• C. 36 Hours
• D. 48 Hours

Answer: (B)

Flight data recorders are designed to keep a rolling window of the most recent flight and system data to support investigations. The twenty-five hour window is the standard balance between having enough data to cover typical flight durations and keeping the data storage practical on modern aircraft. A shorter span, like twelve hours, could miss important events on longer trips or multi-leg missions. A longer span, such as thirty-six or forty-eight hours, would require more memory and maintenance without providing proportional investigative value for everyday operations. Therefore, twenty-five hours is the most appropriate and commonly used retention period.

Flight data recorders are designed to keep a rolling window of the most recent flight and system data to support investigations. The twenty-five hour window is the standard balance between having enough data to cover typical flight durations and keeping the data storage practical on modern aircraft. A shorter span, like twelve hours, could miss important events on longer trips or multi-leg missions. A longer span, such as thirty-six or forty-eight hours, would require more memory and maintenance without providing proportional investigative value for everyday operations. Therefore, twenty-five hours is the most appropriate and commonly used retention period.