The abbreviations used in this part have the following meanings:
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| EPA | U.S. Environmental Protection Agency.
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| FAA | U.S. Federal Aviation Administration.
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| GHG | greenhouse gas.
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| IBR | incorporation by reference.
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| ICAO | International Civil Aviation Organization.
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| MTOM | maximum takeoff mass.
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| RGF | reference geometric factor.
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| SAR | specific air range. |