14 CFR 27.653
§ 27.653 Pressure venting and drainage of rotor blades.
United States · 14 CFR — Aeronautics and Space · Status: effective
Cite this
- Citation
- 14 CFR 27.653, § 27.653 Pressure venting and drainage of rotor blades, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/54496
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Full text
(a) For each rotor blade—
(1) There must be means for venting the internal pressure of the blade;
(2) Drainage holes must be provided for the blade; and
(3) The blade must be designed to prevent water from becoming trapped in it.
(b) Paragraphs (a)(1) and (2) of this section does not apply to sealed rotor blades capable of withstanding the maximum pressure differentials expected in service.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.