What is the Airworthiness Directive applicability for an IVO-355 engine with specific serial numbers and total flight hours?

The correct answer specifies that the Airworthiness Directive (AD) applies to all IVO-355 engines with serial numbers ranging from T8000 to T8300. This means that the directive addresses the safety and maintenance issues pertinent to those specific engine serial numbers, which can be crucial for ensuring that any identified potential hazards or safety concerns are effectively managed within that defined group.

In the aviation industry, Airworthiness Directives are legally enforceable regulations issued by the FAA to ensure that any unsafe conditions are rectified in specific aircraft or engine models. The applicability range based on serial numbers indicates that these engines experience similar manufacturing processes or components that could lead to the same issues. By referring to the specific serial numbers, the AD ensures that only those engines that might share the same risks due to their production batch are subject to the mandated inspections, modifications, or repairs outlined in the directive.

This approach is important for safety compliance and prevents unnecessary inspections and maintenance on engines outside of the identified range that may not be affected by the same issues. Understanding the specific scope of an AD helps operators focus their resources and efforts on compliance for those engines that truly require attention based on safety evaluations.