Which type of damage is NOT typically found on compressor blades during inspection?

Blistering is not typically associated with compressor blades during inspection. Compressor blades, subjected to extensive thermal and mechanical stresses, often show signs of damage from erosion, foreign object impact, or thermal fatigue.

Dents are usually formed when blades are struck by foreign objects. Craters can be a result of severe erosion or fatigue, where material has been lost due to high speeds and turbulent airflow. Pitting is often seen in metal fatigue or corrosion scenarios, usually on the surfaces of the blades. In contrast, blistering is more commonly related to issues in coatings or other environments rather than directly on the blades themselves. This characteristic distinguishes it from the types of damage that are traditionally noted during compressor blade inspections.