What does an engine data recorder do?

An engine data recorder plays a crucial role in aircraft engine performance and maintenance by capturing operational data for analysis. This device continuously monitors and records parameters such as engine temperature, pressure, vibration, and fuel consumption during flight. The collected data can be analyzed later to assess engine performance, identify any anomalies, and inform maintenance decisions. This analysis helps ensure engine reliability, safety, and efficiency over time.

While other options mention important aspects of engine operation, they do not encompass the primary function of the engine data recorder. Preventing engine overheating is crucial but is typically managed by the engine's cooling systems and alerts rather than the recorder itself. Measuring fuel flow in real-time is an important function, but it represents only one of many parameters logged by the engine data recorder. Providing live updates to the pilot can come from various onboard systems, but the core purpose of the engine data recorder is focused on recording data rather than live interaction.