{"data":{"id":"us/40-cfr-1030.20","jurisdiction":"us","citation":"40 CFR 1030.20","heading":"Fuel efficiency metric.","body":"For each airplane subject to this part, including an airplane subject to the change criteria of § 1030.35, a fuel efficiency metric value must be calculated in units of kilograms of fuel consumed per kilometer using the following equation, rounded to three decimal places:\nWhere:\nSAR = specific air range, determined in accordance with § 1030.23.\nRGF = reference geometric factor, determined in accordance with § 1030.25.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1030—CONTROL OF GREENHOUSE GAS EMISSIONS FROM ENGINES INSTALLED ON AIRPLANES"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"1f874b337ecfd0a7b5ea4d6f0c7d90800bec8bfb7fde72852bf712cdd40538fe","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1030.10","next":"us/40-cfr-1030.23"},"notice":"GroundRules: Original legal text. Not legal advice."}