Damage to the compressor blades results in what?

• A. Immediate engine shutdown
• B. Slight noise increase
• C. A compressor geometry change that can cause performance deterioration, stalls, or engine failure
• D. Improved fuel efficiency

Answer: (C)

Damage to compressor blades changes the rotor geometry and the way air flows through the compressor. Nicks, dents, or bending alter blade camber, twist, and incidence, creating flow disturbances and local inefficiencies. That disrupts the smooth passage of air, reduces the compressor’s pressure rise and overall efficiency, and can lower surge margin. When the flow becomes unstable, the compressor can stall or surge, which may propagate to the engine and lead to loss of thrust or even engine failure. It’s not simply a slight noise or an immediate shutdown; the main issue is degraded performance that can escalate to dangerous operating conditions.