Answer :
Airworthiness Directives (ADs) are due as specified in the AD itself, and they contain mandatory instructions that must be complied with for aircraft safety. Therefore, the correct option is As specified in the AD.
When considering the question of when Airworthiness Directives (ADs) are due, the correct answer is that they are due as specified in the AD. ADs are issued by aviation authorities to notify aircraft operators of mandatory modifications, inspections, repairs, or changes in operations that are necessary for safety reasons.
It is crucial to adhere strictly to the timelines and requirements specified within each individual AD, as they are legally enforceable and must be complied with to ensure the airworthiness of the aircraft. Failure to comply with an AD can result in grounding of the aircraft and legal consequences for the operator. Therefore, the correct option is As specified in the AD.
