In the context of engine indications, what does the N2 gauge display?

The N2 gauge specifically displays the rotational speed of the second stage of the engine's compressor, commonly referred to as the high-pressure turbine or second spool. This gauge is crucial for assessing the performance and operational status of the engine during flight.

An increase or decrease in the N2 readings can indicate issues such as an engine malfunction or inefficiencies within the engine systems. Monitoring N2 is essential for pilots as it helps ensure that the engine is functioning within safe and efficient parameters.

Understanding the specific function of the N2 gauge is important for effective engine management, as it plays a critical role in the overall performance metrics of the aircraft’s engine system.