What are some common signs of fatigue in aircraft components?

Fatigue in aircraft components refers to the progressive and localized structural damage that occurs when a material is subjected to repeated loading. Common signs of fatigue include visible cracks and material deformation. These manifestations indicate that the component has experienced stress beyond its safe limits over time, leading to microscopic changes in the material structure that can eventually result in failure.

Cracks are often the most observable signs of fatigue, as they can grow and propagate with ongoing use, ultimately jeopardizing the integrity of the component. Material deformation might not always be immediately visible but can lead to improper fitting or alignment, affecting overall aircraft performance and safety. Recognizing these signs is crucial for maintenance personnel to address any potential issues before they escalate into more serious defects.

The other signs listed, such as changes in engine noise, loss of control surface effectiveness, and decreased fuel efficiency, can occur due to various factors, including operational wear, mechanical failures, or environmental conditions, but do not specifically indicate fatigue.