Where can you find the Airworthiness Standards for transport category airplanes?

The Airworthiness Standards for transport category airplanes are specified in FAR Part 25. This part of the Federal Aviation Regulations outlines the design and performance requirements necessary to ensure that these types of aircraft are safe for operation. These standards incorporate criteria for various aspects of the aircraft, including structural integrity, performance under normal and abnormal conditions, and systems reliability.

FAR Part 25 is critical because it sets the baseline for certification of Transport Category aircraft, which includes larger passenger and cargo planes. Understanding these standards is essential for both design and maintenance personnel in ensuring compliance with federal regulations concerning the safety and airworthiness of such aircraft.

In contrast, the other options serve different purposes. FAR Part 21 deals primarily with the certification procedures for products and parts, while FAA Advisory Circulars provide guidance and clarification on regulatory requirements but are not the actual standards themselves. Service Bulletins, on the other hand, are issued by manufacturers and provide information or instructions on specific maintenance actions or modifications but don't establish airworthiness standards.