{"data":{"id":"us/14-cfr-25.1731","jurisdiction":"us","citation":"14 CFR 25.1731","heading":"Powerplant and APU fire detector system: EWIS.","body":"(a) EWIS that are part of each fire or overheat detector system in a fire zone must be fire-resistant.\n(b) No EWIS component of any fire or overheat detector system for any fire zone may pass through another fire zone, unless:\n(1) It is protected against the possibility of false warnings resulting from fires in zones through which it passes; or\n(2) Each zone involved is simultaneously protected by the same detector and extinguishing system.\n(c) EWIS that are part of each fire or overheat detector system in a fire zone must meet the requirements of § 25.1203.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES","Subpart H—Electrical Wiring Interconnection Systems (EWIS)"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-14.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:20Z","sha256":"5fc0aff942dcb7dc905b0be73fc817ad98382e18c6ead6e0a69b81b1187f25c0","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-25.1729","next":"us/14-cfr-25.1733"},"notice":"GroundRules: Original legal text. Not legal advice."}