14 CFR 38.11
§ 38.11 Fuel efficiency metric.
United States · 14 CFR — Aeronautics and Space · Status: effective
Cite this
- Citation
- 14 CFR 38.11, § 38.11 Fuel efficiency metric, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/55240
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Full text
For each airplane subject to this part, or to determine whether a modification makes an airplane subject to this part under the change criteria of § 38.19, a fuel efficiency metric value must be calculated, using the following equation, rounded to three decimal places:
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.