Civil Supersonic Airplane Noise Type Certification Standards and Operating Rules

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The Federal Aviation Administration (FAA) is withdrawing a previously published Notice of Proposed Rulemaking (NPRM) that proposed to amend the Federal Aviation Regulations to revise the airplane type certification standards and operating rules. The proposed amendments would have required that future civil supersonic airplanes meet noise limits consistent with those required for future civil subsonic airplanes. The FAA is postponing development of a final rule because it cannot ensure that the final rule would be economically reasonable and technologically practical at this time. The FAA will continue to gather technical information and analyze suggested recommendations for test and measurement conditions.