Which document type is often used alongside ATC transcripts, CVR, FDR data, and radar tracks to support flight path reconstruction?

• A. Passenger seating charts
• B. Airline marketing brochures
• C. Hotel reservation records
• D. Airworthiness documents

Answer: (D)

Accurate flight path reconstruction requires not only real-time position and event data, but also knowledge of the aircraft’s actual configuration and airworthiness status at the time. Airworthiness documents provide the official records of certification, maintenance history, current equipment, and any restrictions or inoperative systems (through MELs, ADs, service bulletins, and maintenance logs). This information is crucial because it can affect performance, weight and balance, and allowable flight regimes. Knowing what was installed, what maintenance was performed, and what limitations existed lets investigators interpret radar tracks, FDR data, and CVR events correctly—for example, whether a performance anomaly was due to a system issue or normal operating limits given the aircraft’s configuration.

Other documents like seating charts, marketing brochures, or hotel records don’t inform the aircraft’s performance capabilities or maintenance status, so they don’t contribute to reconstructing the flight path in the same way.