What is the primary purpose of Service Bulletins?

The primary purpose of Service Bulletins is to inform aircraft owners of design defects, safety issues, or updates in maintenance procedures that are important for the safe and efficient operation of the aircraft. Service Bulletins provide crucial information that can help prevent accidents and incidents by addressing potential problems that have been identified after an aircraft's design or production. This communication allows owners and operators to take the necessary actions, such as inspections or modifications, to ensure safety and compliance with manufacturer guidelines.

While other options may touch on aspects of aircraft maintenance or compliance, they do not capture the primary role of Service Bulletins, which is focused on alerting users about specific issues related to a particular aircraft model or component.