A red N2 RPM indication alerts the pilot to?

A red N2 RPM indication alerts the pilot to?

• A. The engine is failed
• B. Non-critical issue
• C. An operating limit being exceeded
• D. Reverse thrust engaged

Answer: (C)

A red N2 RPM indication means the high‑speed spool is outside its safe operating envelope—an overspeed or other limit being exceeded. N2 represents the core/compressor speed, and the red warning shows you’ve passed the approved maximum, which can quickly cause mechanical damage if not corrected. This isn’t a failure indication; it’s a limit-violation alert that prompts immediate action to bring RPM back within the allowed range, following the published procedures. It’s not a non-critical issue, and it isn’t specifically indicating that reverse thrust is engaged; those situations have different indicators.

A red N2 RPM indication means the high‑speed spool is outside its safe operating envelope—an overspeed or other limit being exceeded. N2 represents the core/compressor speed, and the red warning shows you’ve passed the approved maximum, which can quickly cause mechanical damage if not corrected. This isn’t a failure indication; it’s a limit-violation alert that prompts immediate action to bring RPM back within the allowed range, following the published procedures. It’s not a non-critical issue, and it isn’t specifically indicating that reverse thrust is engaged; those situations have different indicators.