When must compliance with an Airworthiness Directive occur after it becomes effective?

The requirement for compliance with an Airworthiness Directive (AD) is dictated by the specific terms outlined within the AD itself. Each AD will provide details such as the required compliance time, which can vary based on the nature and urgency of the issue addressed.

In practice, some ADs may require immediate action, while others might allow for compliance to occur during the next scheduled maintenance or within a specified timeframe, such as 30 days. Therefore, the correct approach is to refer directly to the language of the AD to determine when compliance must be completed. This emphasizes the importance of understanding the specifics of each AD, as the timeline is not uniform and can be influenced by factors such as the potential risk to safety or the nature of the required corrective actions.

Options that suggest immediate compliance after publication, a fixed timeframe of 30 days, or syncing with scheduled maintenance do not capture the variability stipulated in different ADs, which is why they do not reflect the correct understanding of how and when to comply with these critical safety directives.