Which of the following provides guidelines on the continued airworthiness of an aircraft?

The correct answer is airworthiness limitations, as these limitations are specifically outlined by the manufacturer's documentation and are intended to ensure the continued airworthiness of an aircraft over its operational life. Airworthiness limitations encompass mandatory maintenance, inspection, and replacement requirements that are essential for maintaining the safety and operational integrity of the aircraft. They are often found in the aircraft's maintenance manuals and must be adhered to by maintenance personnel to ensure compliance with regulatory standards.

The main body of regulations provides the overarching framework for aviation safety and standards, but it does not offer the detailed, specific guidance related to the airworthiness of individual aircraft that airworthiness limitations do. Manufacturer's service history contains valuable information regarding past performances and issues of specific aircraft types but does not serve as official guidelines for maintaining airworthiness. Component specifications detail the design and performance criteria for parts but do not outline the required actions necessary for maintaining the overall airworthiness of the aircraft.