What severity level is assigned to corrosion that penetrates a depth of 0.001 inch?

Corrosion that penetrates a depth of 0.001 inch is classified as light. This classification is based on the general criteria used in the aviation industry to evaluate corrosion severity. Light corrosion is typically characterized by minimal material loss that does not significantly affect the structural integrity or performance of the aircraft components.

Understanding the differences in severity levels allows aviation professionals to prioritize maintenance and inspections effectively. Severe corrosion would involve much deeper penetration and significant material loss, whereas moderate corrosion would be intermediate, typically deeper than light but not as critical as severe.

Recognizing these classifications helps maintenance personnel and inspectors to assess and determine the necessary actions required to maintain airworthiness and ensure safety. This also highlights the importance of ongoing inspections and assessments to catch corrosion early before it progresses to a more severe level.