{"data":{"id":"us/14-cfr-38.17","jurisdiction":"us","citation":"14 CFR 38.17","heading":"Fuel efficiency limits.","body":"(a) The fuel efficiency limits in this section are expressed as maximum permitted fuel efficiency metric values, as calculated under § 38.11.\n(b) The fuel efficiency metric value of an airplane subject to this part may not exceed the following, rounded to three decimal places:","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 38—AIRPLANE FUEL EFFICIENCY CERTIFICATION","Subpart B—Determining Fuel Efficiency for Subsonic Airplanes"],"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":"67990882d26091349294ef9dfef4539ac8aa0da238eed1f437a00f329063dac7","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-38.15","next":"us/14-cfr-38.19"},"notice":"GroundRules: Original legal text. Not legal advice."}