During which maintenance is the requirement for corrosion damage inspection established?

The requirement for corrosion damage inspection is established during unscheduled maintenance. Unscheduled maintenance may arise from unexpected issues or findings, such as when an aircraft experiences anomalies that require immediate attention. During this process, technicians assess the aircraft to identify and remedy various concerns, including potential corrosion that may have developed unnoticed. This type of maintenance prioritizes thorough evaluations to ensure safety and operational readiness, making it critical to address any corrosion damage as part of the inspection protocols.

In contrast, scheduled maintenance, annual inspections, and pre-flight checks typically have established guidelines and frequency for inspections, which may include corrosion assessment but do not necessarily trigger a focused inspection solely due to unexpected findings. Unscheduled maintenance highlights the importance of being proactive in identifying and mitigating corrosion risks as issues arise.