According to 14 CFR Section 91.417(a)(2)(v), how is the revision date of applicable Airworthiness Directives (ADs) determined?

The revision date of applicable Airworthiness Directives (ADs) is determined by the effective date of the latest amendment. This is crucial because each AD can be amended over time to address new safety concerns or technical details, and the effective date signifies when the latest changes or requirements outlined in the AD become enforceable. By relying on the effective date, those in aviation maintenance can ensure they are complying with the most current and pertinent regulations for safety and airworthiness.

The other answers do not accurately reflect how the revision date is determined. For instance, while the opening sentence of an AD can provide important details about its scope and requirements, it does not specifically detail revision dates. Similarly, while the AD number may provide some historical context, it does not serve as an indicator of the effective date or the revision history. Understanding that the effective date marks the current standard helps in maintaining the necessary compliance and safety in aviation operations.