content_image/528104.jpg
rates for each of these modes and conditions allows the calculation of emissions from each testing mode. 

The methodology for calculating overall emissions from aircraft en gine testing is expressed by Equation A5-8 ( Total Pollutant Emissions for Aircraft Engine Testing ). 

Where: 

E = total emissions of pollutant. 

N = Number of test cycles performed. 

TT$_{MODE }$= average test time for a specific testing mode, expressed in minutes. 

<img src='content_image/528104.jpg'>

FF$_{MODE }$= fuel flow rate while in a specific testing mode, expressed in pounds per minute. 

EF = emission factor of pollutant (i.e., CO, SO$_{2}$, PM$_{10}$, PM$_{2.5}$, NO$_{x}$, or VOC), expressed in pounds per thousand pounds of fuel burned. 

Data inputs required to execute Equation A5-8 ( Total Pollutant Emissions for Aircraft Engine Testing ) and their respective sources are listed in the following sections. 

## A5.2.6.2 Testing Data 

Maintenance personnel should be consulted to determine the typical number of test cycles performed upon each aircraft. In addition, a ircraft engine test time for each testing mode varies with the engine type, goals of the test, and equipment used. Therefore, site-specific information on test times should be obtained from the maintenance personnel performing the testing. 

## A5.2.6.3 Engine Fuel Flow 

The default average fuel consumption rate, in pounds per minute, of an engine in operational mode, is provided in Chapter 5 of EPA’s Procedures for Emission Inventory Preparation, Volume IV: Mobile Source , 26 and in the ICAO ’s Engine Exhaust Emissions Databank 27 . For military aircraft, the EPA’s Procedures for Emission Inventory Preparation, Volume IV: Mobile Source should be used. These engine fuel flow default values are adapted within EDMS/AEDT. 

## A5.2.6.4 Emission Factors 

Emission factors for an aircraft engine are listed by operating mode, generally, in pounds of pollutant per thousand pounds of fuel consumed. Average emission factor data for engines by operating mode are included in EDMS /AEDT and have been adapted from EPA’s Procedures 

