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FAA Outlines Information Needed for Supersonic Flight Tests

The FAA took another step toward facilitating the development of civil supersonic aircraft with the release of a final rule today that clarifies procedures for obtaining special flight authorizations for flight testing beyond Mach 1.

Adopted largely as proposed in June 2019, the final rule outlines the information needed for applications of special flight authorization and designates the FAA program office that will process those applications. It also creates a more “user-friendly” format, the agency said. The rule further recognizes that supersonic flight testing could be used to gather noise data.

However, the rule does not lift the ban on supersonic flight over land. Nor does it represent a policy change; instead, the rule streamlines and simplifies access to the various information necessary for special flight authorizations.

The FAA did revise language in the final rule involving the environmental review process. It had originally proposed language to clarify information necessary for the FAA to make a National Environmental Policy Act (NEPA) determination. However, after receiving comments, the agency found the language actually generated confusion.

“The proposed language providing more detail about what an applicant could submit was not intended to imply that FAA would forego independently evaluating the information or closely examining the environmental impacts on a proposed test area in determining whether to grant a particular special flight authorization,” the agency said. “The language was also not intended to imply shifting the burden of complying with NEPA to the applicant rather than the FAA.”

According to the FAA, a number of requests in comments surrounding the ability for more than one program to use a designated test site were received. In response, the FAA said the application process provides latitude for requesting such test sites and added regulations do not limit a flight test area to one applicant. However, each applicant is expected to submit its own environmental information regarding a test site.