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Regulations last checked for updates: May 14, 2025
Title 14 - Aeronautics and Space last revised: May 07, 2025
All Titles
Title 14
Chapter I
Part 38
Subpart B - Subpart B—Determining Fuel Efficiency for Subsonic Airplanes
§ 38.11 - Fuel efficiency metric.
§ 38.13 - Specific air range.
§ 38.15 - Reference geometric factor.
§ 38.17 - Fuel efficiency limits.
§ 38.19 - Change criteria.
§ 38.21 - Approval before compliance testing.
§ 38.23 - Manual information and limitations.
Appendix Appendix A - Appendix A to Part 38—Determination of Airplane Fuel Efficiency Metric Value
authority:
42 U.S.C. 4321
source:
Docket No. FAA-2022-0241, Amdt. No. 21-107, 89 FR 12654, Feb. 16, 2024, unless otherwise noted.
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