{"data":{"id":"us/14-cfr-121.253","jurisdiction":"us","citation":"14 CFR 121.253","heading":"Powerplant fire protection.","body":"(a) Designated fire zones must be protected from fire by compliance with §§ 121.255 through 121.261.\n(b) Designated fire zones are—\n(1) Engine accessory sections;\n(2) Installations where no isolation is provided between the engine and accessory compartment; and\n(3) Areas that contain auxiliary power units, fuel-burning heaters, and other combustion equipment.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER G—AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS","PART 121—OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS","Subpart J—Special Airworthiness Requirements"],"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":"971279531eed85856c244139e9f74327c4256188bebdb4a0db3f6279ee12c45c","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-121.251","next":"us/14-cfr-121.255"},"notice":"GroundRules: Original legal text. Not legal advice."}