{"data":{"id":"us/14-cfr-121.229","jurisdiction":"us","citation":"14 CFR 121.229","heading":"Location of fuel tanks.","body":"(a) Fuel tanks must be located in accordance with § 121.255.\n(b) No part of the engine nacelle skin that lies immediately behind a major air outlet from the engine compartment may be used as the wall of an integral tank.\n(c) Fuel tanks must be isolated from personnel compartments by means of fume- and fuel-proof enclosures.","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":"f0e836ec55b9288a6020a876c3d33eaf50a6e9a7e2582aac7f7bcb7136da0792","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-121.227","next":"us/14-cfr-121.231"},"notice":"GroundRules: Original legal text. Not legal advice."}