What is required of the registered owner or operator regarding Airworthiness Directives (AD)?

The correct choice is maintaining a record of the status of applicable Airworthiness Directives (ADs). This requirement is crucial because each AD issued by the FAA addresses safety concerns and mandates that the operator or owner comply with specific actions to ensure the continued airworthiness of their aircraft. Keeping a record includes documenting compliance status, such as whether the directive has been complied with, is in progress, or has not been addressed, which helps demonstrate commitment to maintaining safety and regulatory compliance.

While various options might seem important, documenting the status of ADs is essential for ensuring that no needed corrective actions are overlooked. This also aids in maintaining accurate and up-to-date records, which may be necessary for inspections and potential future actions related to airworthiness. Such documentation is critical not only for legal and regulatory purposes but also for the safety of operation, as AD compliance plays a fundamental role in aircraft maintenance practices.