# 14 C.F.R. § 91.821 (2026): Civil supersonic airplanes: Noise limits

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_821

## Section

- **Citation:** 14 C.F.R. § 91.821 (2026)
- **Heading:** Civil supersonic airplanes: Noise limits
- **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 / § 91.821: § 91.821   Civil supersonic airplanes: Noise limits.

## Text

Except for Concorde airplanes having flight time before January 1, 1980, no person may operate in the United States, a civil supersonic airplane that does not comply with Stage 2 noise limits of part 36 in effect on October 13, 1977, using applicable trade-off provisions.

## 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)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T14_P91_S91_821. Check the current official text before relying on it. Not legal advice.