APPENDIX A1$_{ }$ 7$_{ }$ Time-in-mode (TIM) data required by EDMS/AEDT includes the time an aircraft spends in each  of the four operating modes  (i.e., takeoff, climb out, approach, and taxi/idle) discussed  previously. EDMS/AEDT calculates performance-based TIMs using flight profile data that are  based on the airframe, engine, aircraft weight, and approach angle.  Potential sources of airport-specific taxi/idle times include aircraft operators, airport operators  and/or on-site measurements. Other data sources may include airport master plans, airport  Source: EDMS v5.1.3; for further information on EDMS, see:  http://www.faa.gov/about/office_org/headquarters_offices/apl/research/models/edms  _model/.  Future year aircraft fleet mix data may be obtainable from an  Airport Master Plan Study and/or  the FAA Aerospace Forecast for the airport.  A1.3.3  Time-in-mode  Aircraft type and engine combinations data can also be acquired from airline(s)/tenant(s) surveys  of their fleets. However, while this approach would  yield highly accurate results, the data is  rarely available. Airline financial reports may also report these aircraft and engines information.  When unavailable, aircraft engine assignments can be based on EDMS /AEDT default values.  Table A1-4  ( Example of EDMS/AEDT Aircraft Fleet Mix ) is an example of an aircraft fleet mix /  engine combination derived from the EDMS default database.  Source: Federal Aviation Administration (FAA); OAG Absolute Aviation Advantage, 2013; BUCHair USA Inc., 2013; Airport  IQ5010, 2013; and Bureau of Transportation Statistics (BTS), 2013.  Data Source  Description  Category  Model  Engine  Air Carrier  Airbus A320-200 Series  V2527-A5  Boeing 767-200 Series  CF6-80A  Airbus A319-100 Series  CFM56-5B6/P  Air Taxi/Commuter  Saab 340-A  CT7-5A2  Bombardier CRJ-100  CF34-3A1 LEC II  Gulfstream G500  BR700-710A1-10  General Aviation (GA)  Cessna 750 Citation X  AE3007C Type 2  Bombardier Learjet 25  CJ610-6  Piper PA-31 Navajo  TIO-540-J2B2  Military  Boeing F/A-18 Hornet  F404-GE-400  Northrop F-5E/F Tiger II  J85-GE-21  T-38 Talon  J85-GE-5H (w/AB)  Table A1-4. Example of EDMS/AEDT Aircraft Fleet Mix 