14 CFR 121.239
§ 121.239 Oil valves.
United States · 14 CFR — Aeronautics and Space · Status: effective
Cite this
- Citation
- 14 CFR 121.239, § 121.239 Oil valves, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/56687
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Full text
(a) Each oil valve must—
(1) Comply with § 121.257;
(2) Have positive stops or suitable index provisions in the “on” and “off” positions; and
(3) Be supported so that loads resulting from its operation or from accelerated flight conditions are not transmitted to the lines attached to the valve.
(b) The closing of an oil shutoff means must not prevent feathering the propeller, unless equivalent safety provisions are incorporated.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.