Code of Federal Regulations

Title 14 - Aeronautics and Space
Volume: 1Date: 2020-01-01Original Date: 2020-01-01Title: Section § 25.1731 - Powerplant and APU fire detector system: EWIS.Context: 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).
§ 25.1731 Powerplant and APU fire detector system: EWIS. (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.