Cessna 120 — Supplemental Type Certificate

The document is the Civil Aeronautics Manual 3, published by the Federal Aviation Agency in March 1959. It provides comprehensive guidelines and regulations concerning airplane airworthiness across various categories, including Normal, Utility, and Acrobatic. The manual is intended for aviation professionals and enthusiasts, detailing the requirements for certification, inspections, tests, and compliance with the Civil Air Regulations. It serves as a reference for understanding the technical standards and policies that govern aircraft operations and safety.

• The manual covers regulations effective as of May 15, 1956, amended by Amendments 3-1 through 3-4.
• It includes detailed certification requirements for aircraft, emphasizing compliance with the Civil Air Regulations.
• Airplane categories are defined, with specific approved maneuvers for Normal, Utility, and Acrobatic categories.
• Weight and balance limitations are crucial for flight tests, including empty weight and center of gravity considerations.
• Performance requirements for takeoff, climb, and landing are specified, including stalling speeds.