# 14 C.F.R. § 91.818 (2026): Special flight authorization to exceed Mach 1 > Federal · Regulations · In force URL: https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_818 ## Section - **Citation:** 14 C.F.R. § 91.818 (2026) - **Heading:** Special flight authorization to exceed Mach 1 - **Jurisdiction:** Federal - **Kind:** Regulations - **Status:** In force - **Text as of:** August 14, 2026 - **Source:** Compiled text - **Location:** Title 14 CFR: Aeronautics and Space / Chapter I: FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION / Part 91: GENERAL OPERATING AND FLIGHT RULES / Subpart I: Operating Noise Limits / § 91.818: § 91.818 Special flight authorization to exceed Mach 1. ## Text For all civil aircraft, any operation that exceeds Mach 1 may be conducted only in accordance with a special flight authorization issued to an operator in accordance with the requirements of this section. (a) Application. Application for a special flight authorization to exceed Mach 1 must be made to the FAA Office of Environment and Energy for consideration by the Administrator. Each application must include: (1) The name of the operator; (2) The number and model(s) of the aircraft to be operated; (3) The number of proposed flights; (4) The date range during which the flight(s) would be conducted; (5) The time of day the flight(s) would be conducted. Proposed night operations may require further justification for their necessity; (6) A description of the flight area requested by the applicant, including any environmental information required to be submitted pursuant to paragraph (c) of this section; (7) All conditions and limitations on the flight(s) that will ensure that no measurable sonic boom overpressure will reach the surface outside of the proposed flight area; and (8) The reason(s) that operation at a speed greater than Mach 1 is necessary. A special flight authorization to exceed Mach 1 may be granted only for operations that are intended to: (i) Show compliance with airworthiness requirements; (ii) Determine the sonic boom characteristics of an aircraft; (iii) Establish a means of reducing or eliminating the effects of sonic boom, including flight profiles and special features of an aircraft; (iv) Demonstrate the conditions and limitations under which speeds in excess of Mach 1 will not cause a measurable sonic boom overpressure to reach the surface; or with airworthiness requirements; (ii) Determine the sonic boom characteristics of an aircraft; (iii) Establish a means of reducing or eliminating the effects of sonic boom, including flight profiles and special features of an aircraft; (iv) Demonstrate the conditions and limitations under which speeds in excess of Mach 1 will not cause a measurable sonic boom overpressure to reach the surface; or (v) Measure the noise characteristics of an aircraft to demonstrate compliance with noise requirements imposed under this chapter, or to determine the limits for operation in accordance with § 91.817(b). (9) For any purpose listed in paragraph (a)(8) of this section, each applicant must indicate why its intended operation cannot be safely or properly accomplished over the ocean at a distance ensuring that no sonic boom overpressure reaches any land surface in the United States. (b) Operation outside a test area. An applicant may apply for an authorization to conduct flights outside a test area under certain conditions and limitations upon a conservative showing that: (1) Flight(s) within a test area have been conducted in accordance with an authorization issued for the purpose specified in paragraph (a)(8)(iv) of this section; (2) The results of the flight test(s) required by paragraph (b)(1) of this section demonstrate that a speed in excess of Mach 1 does not cause a measurable sonic boom overpressure to reach the surface; and (3) The conditions and limitations determined by the test(s) represent all foreseeable operating conditions and are effective on all flights conducted under an authorization. v) of this section; (2) The results of the flight test(s) required by paragraph (b)(1) of this section demonstrate that a speed in excess of Mach 1 does not cause a measurable sonic boom overpressure to reach the surface; and (3) The conditions and limitations determined by the test(s) represent all foreseeable operating conditions and are effective on all flights conducted under an authorization. (c) Environmental findings. (1) No special flight authorization will be granted if the Administrator finds that such action is necessary to protect or enhance the environment. (2) The Administrator is required to consider the potential environmental impacts resulting from the issuance of an authorization for a particular flight area pursuant to the National Environmental Policy Act of 1969 (NEPA) (42 U.S.C 4321 et seq. ), all applicable regulations implementing NEPA, and related Executive orders and guidance. Accordingly, each applicant must provide information that sufficiently describes the potential environmental impact of any flight in excess of Mach 1, including the effect of a sonic boom reaching the surface in the proposed flight area, to enable the FAA to determine whether such impacts are significant within the meaning of NEPA. (d) Issuance. An authorization to operate a civil aircraft in excess of Mach 1 may be issued only after an applicant has submitted the information described in this section and the Administrator has taken the required action regarding the environmental findings described in paragraph (c) of this section. o enable the FAA to determine whether such impacts are significant within the meaning of NEPA. (d) Issuance. An authorization to operate a civil aircraft in excess of Mach 1 may be issued only after an applicant has submitted the information described in this section and the Administrator has taken the required action regarding the environmental findings described in paragraph (c) of this section. (e) Duration. (1) An authorization to exceed Mach 1 will be granted for the time the Administrator determines necessary to conduct the flights for the described purposes. (2) An authorization to exceed Mach 1 is effective until it expires or is surrendered. (3) An authorization to exceed Mach 1 may be terminated, suspended, or amended by the Administrator at any time the Administrator finds that such action is necessary to protect the environment. (4) The holder of an authorization to exceed Mach 1 may request reconsideration of a termination, amendment, or suspension issued under paragraph (e)(3) of this section within 30 days of notice of the action. Failure to request reconsideration and provide information why the Administrator's action is not appropriate will result in permanent termination of the authorization. (5) Findings made by and actions taken by the Administrator under this section do not affect any certificate issued under chapter 447 of Title 49 of the United States Code. [Docket FAA-2019-0451, Amdt. 91-362, 86 FR 3792, Jan. 15, 2021] ## Nearby sections - [14 C.F.R. § 91.801 (2026) § 91.801 Applicability: Relation to part 36.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_801.md) - [14 C.F.R. § 91.803 (2026) § 91.803 Part 125 operators: Designation of applicable regulations.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_803.md) - [14 C.F.R. § 91.805 (2026) § 91.805 Final compliance: Subsonic airplanes.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_805.md) - [14 C.F.R. § 91.815 (2026) § 91.815 Agricultural and fire fighting airplanes: Noise operating limitations.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_815.md) - [14 C.F.R. § 91.817 (2026) § 91.817 Civil aircraft sonic boom.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_817.md) - [14 C.F.R. § 91.818 (2026) § 91.818 Special flight authorization to exceed Mach 1.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_818.md) - [14 C.F.R. § 91.819 (2026) § 91.819 Civil supersonic airplanes that do not comply with part 36.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_819.md) - [14 C.F.R. § 91.821 (2026) § 91.821 Civil supersonic airplanes: Noise limits.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_821.md) - [14 C.F.R. § 91.851 (2026) § 91.851 Definitions.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_851.md) - [14 C.F.R. § 91.853 (2026) § 91.853 Final compliance: Civil subsonic airplanes.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_853.md) - [14 C.F.R. § 91.855 (2026) § 91.855 Entry and nonaddition rule.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_855.md) - [14 C.F.R. § 91.857 (2026) § 91.857 Stage 2 operations outside of the 48 contiguous United States.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_857.md) - [14 C.F.R. § 91.858 (2026) § 91.858 Special flight authorizations for non-revenue Stage 2 operations.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_858.md) - [14 C.F.R. § 91.859 (2026) § 91.859 Modification to meet Stage 3, Stage 4, or Stage 5 noise levels.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_859.md) --- Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_818. 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