What does CS 25 specify?

CS 25, or Certification Specifications for Large Aeroplanes, outlines the performance and design requirements that must be met for the certification of large commercial aircraft. This set of specifications is crucial as it ensures that the aircraft is safe, efficient, and capable of functioning under various operating conditions.

The requirements provided in CS 25 cover a wide range of topics, including structural integrity, flight performance, systems reliability, and environmental considerations. By establishing these criteria, CS 25 helps in maintaining a uniform standard across different manufacturers and models, facilitating safe operations in commercial aviation.

The other options focus on narrower aspects of aviation regulation—engine specifications and weight distribution for specific types of aircraft—rather than the broad scope of design and performance that CS 25 encompasses.