What is the range for N2 at idle?

The range for N2 at idle is accurately listed as 56.5 to 68.0%. This specific range is crucial for ensuring that the engines are operating efficiently and within safe limits when the aircraft is in idle mode. Maintaining N2 within this range helps prevent issues such as stall or surge in the engine, which could arise if the parameters fall outside of established limits. The N2 gauge indicates the speed of the high-pressure turbine, and at idle, this range ensures that there is sufficient airflow through the engine to sustain combustion while also allowing for reduced fuel flow and engine wear.