Which regulation established noise certification standards for the design of turbojet and transport category aircraft?

• A. Title 14 CFR Part 36
• B. FAR Part 25
• C. FAR Part 121
• D. Part 139

Answer: (A)

Noise certification standards for turbojet and transport category aircraft are set in Title 14 CFR Part 36. This regulation defines the limits and measurement methods used to certify an aircraft’s noise emissions during design, using metrics like EPNdB and specifying the test points (takeoff, sideline, approach) and procedures needed to show compliance before certification. It sits separate from Part 25, which covers general airworthiness requirements for transport-category airplanes, and from Part 121 and Part 139, which regulate airline operations and airport certification, respectively. So, Part 36 is the regulation that establishes the noise certification standards.