Petition for Authorization To Exceed Mach 1

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of Transportation Federal Aviation Administration AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Notice of decision to grant an authorization to exceed Mach 1. SUMMARY: This notice summarizes the petition Hermeus Corporation submitted to FAA requesting a special flight authorization as provided for in FAA regulations. The notice also provides for public awareness of FAA's decision to grant Hermeus Corporation's request. FAA is not requesting comments on the petition or FAA's decision regarding the petition because a special flight authorization petition to exceed Mach 1 follows a separate regulatory process. DATES: The grant of the special flight authorization to exceed Mach 1 is effective August 20, 2026. FOR FURTHER INFORMATION CONTACT: David Senzig, Office of Environment and Energy, Federal Aviation Administration, 800 Independence Avenue SW, Washington, DC 20591; 781-238-7034, david.a.senzig@faa.gov . SUPPLEMENTARY INFORMATION: Petitioner: Hermeus Corporation. Applicable Sections of 14 CFR: Sections 91.817 and 91.818. Description of Relief Sought: Hermeus Corporation seeks relief to allow certain flight tests to exceed Mach 1. On May 22, 2026, Hermeus Corporation, Atlanta, GA (Hermeus), petitioned FAA to allow Hermeus to operate a civil aircraft that is expected to exceed Mach 1 speeds during flight testing. Hermeus submitted subsequent revisions to this petition with the final revision received on August 20, 2026. Sp…