What is the primary function of the Flight Data Recorder (FDR)?

The primary function of the Flight Data Recorder (FDR) is to collect and store operational parameters data. This device captures a wide range of flight information during the aircraft's operation, including data about the aircraft's speed, altitude, heading, and various system operations. This information is crucial for investigating incidents or accidents, as it helps determine what occurred during a flight and contributes to safety analyses that can lead to improvements in aviation practices.

The FDR records data continuously and stores it in crash-survivable memory, ensuring that even in the event of an accident, crucial information can be retrieved for analysis. This role in monitoring and preserving operational data is what differentiates the FDR from other devices that may focus on specific aspects like passenger information or entertainment systems.