What is the N2 cautionary percentage range?

• A. 100-105%
• B. 95-101%
• C. 101-108%
• D. 95-99%

Answer: (B)

The N2 cautionary percentage range is specifically defined as 95-101%. This range indicates the operational limits where the N2 speed, or the speed of the main rotor and power turbine, is considered to be approaching the caution zone. Monitoring the N2 speed is critical because it directly impacts engine performance and aircraft safety. Maintaining the N2 within this range allows pilots to ensure the engine is operating within safe parameters, avoiding potential issues that could arise from excessive or inadequate speed. Understanding this range is essential for safe flight operations, particularly during training and operational flying, where adherence to performance limits is required for the safety and performance of the TH-73A.