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Source: FAA; BUCHair USA Inc., 2013; Airport IQ5010, 2013; Bureau of Transportation Statistics (BTS), 2013; and ACRP Report 84, Guidebook for Preparing Airport Emissions Inventories for State Implementation Plans , 2013. 

In those cases where the data sources listed in Table A1-2 ( Aircraft Operational Input Data Sources ) are unavailable, a recent airport study, an airport’s Form 5010 Airport Master Record (ARM), or an Airport System Plan (ASP) prepared by a state/local transportation agency may contain these data. Other recommended data sources include a current Airport Master Plan (AMP), a Federal Aviation Regulations (FAR) Part 150 Noise Study, or an Environmental Impact Statement/Assessment (EIS/EA) for the airport, if available and up-to-date. 

Future year airport operational data may also be obtained from a recent airport study and/or the Terminal Area Forecast (TAF) for National Plan of Integrated Airport Systems (NPIAS) airports (with and without an Air Traffic Control Tower [ATCT]) and from an ASP or the Aerospace Forecast for all other airports as well as from the reference sources listed in Table A1-2 ( Aircraft Operational Input Data Sources ). 

## A1.3.2 Fleet Mix 

Aircraft type and engine data may be obtained from a number of aviation industry publications listed in Table A1-3 ( Fleet Mix Input Data Sources ). 

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