Which statement correctly describes the effect of compressor blade damage?

• A. Increased thrust and efficiency
• B. Compressor geometry change leading to malfunctions such as performance deterioration, stalls, and engine failure
• C. No appreciable effect
• D. Reduced fuel consumption

Answer: (B)

Damage to compressor blades changes the geometry the air must flow over, which disturbs the airflow through the compressor. Even small nicks, leading-edge damage, or bent blades create local flow disturbances and blade-row misalignment, increasing aerodynamic losses and reducing the compressor’s ability to generate the required pressure rise. This can shrink the stall margin and lead to compressor stall or surge, and in severe cases can compromise engine stability or cause failure. So, the statement that blade damage alters compressor geometry and leads to performance deterioration, stalls, and potential engine failure best describes the effect. The other options would imply improvements or negligible impact, which doesn’t reflect how distorted flow degrades performance and can trigger instability.