The DFDR can store flight data for at least the last ____ hours of operation.

The DFDR can store flight data for at least the last ____ hours of operation.

• A. 25
• B. 20
• C. 30
• D. 15

Answer: (A)

The question tests how long the DFDR memory retains flight data. On the A320, the DFDR is designed to keep at least 25 hours of flight data in memory. This retention window means the most recent 25 hours of operation are available for retrieval, and data older than that is overwritten as new data comes in. This size is chosen to cover typical flight blocks and make post-incident or routine investigations feasible without requiring excessive memory. Therefore, the correct fill-in is 25 hours. The other options fall short or exceed the standard minimum retention, but 25 hours is the established requirement.

The question tests how long the DFDR memory retains flight data. On the A320, the DFDR is designed to keep at least 25 hours of flight data in memory. This retention window means the most recent 25 hours of operation are available for retrieval, and data older than that is overwritten as new data comes in. This size is chosen to cover typical flight blocks and make post-incident or routine investigations feasible without requiring excessive memory. Therefore, the correct fill-in is 25 hours. The other options fall short or exceed the standard minimum retention, but 25 hours is the established requirement.