Which statement correctly links FDR and CVR data use to investigation timelines?

• A. FDR/CVR data Are Used to Confirm and Refine the Sequence of Events, Supporting Timeline Reconstruction
• B. FDR/CVR Data Are Used to Determine the Color of the Cockpit
• C. FDR/CVR Data Replace Physical Evidence
• D. FDR/CVR Data Are Only Used for Marketing Purposes

Answer: (A)

FDR and CVR data help investigators pin down the sequence of events and build the investigation timeline. The Flight Data Recorder captures aircraft performance parameters at high frequency—altitude, airspeed, attitude, engine settings, control inputs, system states—providing a precise record of what the aircraft did over time. The Cockpit Voice Recorder adds the crew’s spoken actions, decisions, and cockpit sounds with reference to timestamps. Together, they allow the team to determine when each action occurred relative to others, enabling accurate timeline reconstruction and helping confirm or refine the sequence of events. They support physical evidence by filling gaps or clarifying ambiguities, rather than replacing it. These data are not about cosmetic details or marketing; their purpose is to build a reliable chronology of the flight.