14 CFR 25.1731
§ 25.1731 Powerplant and APU fire detector system: EWIS.
United States · 14 CFR — Aeronautics and Space · Status: effective
Cite this
- Citation
- 14 CFR 25.1731, § 25.1731 Powerplant and APU fire detector system: EWIS, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/54371
- Permanent ID
ys:prov:54371@1- SHA-256
c1da537342d21ddb2734548bf9bc889e7efbd0d6cf1d02c1528b1b97b632dd10
The hash is SHA-256 of this version's text, with every run of whitespace collapsed to a single space and the ends trimmed. The ID always leads back here, and checking it says whether the text you cited is still the current version.
Full text
(a) EWIS that are part of each fire or overheat detector system in a fire zone must be fire-resistant.
(b) No EWIS component of any fire or overheat detector system for any fire zone may pass through another fire zone, unless:
(1) It is protected against the possibility of false warnings resulting from fires in zones through which it passes; or
(2) Each zone involved is simultaneously protected by the same detector and extinguishing system.
(c) EWIS that are part of each fire or overheat detector system in a fire zone must meet the requirements of § 25.1203.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.