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14 CFR · PART 121
Official text · Current as of Oct 19, 2026 · from eCFR
Each fuel valve must—
(a) Comply with § 121.257;
(b) Have positive stops or suitable index provisions in the “on” and “off” positions; and
(c) Be supported so that loads resulting from its operation or from accelerated flight conditions are not transmitted to the lines connected to the valve.
Not legal advice. This is the official text as published in the eCFR, which is updated daily but is not the legal edition. For legal purposes, use the annual Code of Federal Regulations or ask an aviation attorney.