1 Estimation of Actual Gate Out Time 2 Estimation of Actual Gate In Time 3 Estimation of Actual Wheels Off Time 4 Estimation of Actual Wheels On Time 5 Estimation of Average Taxi Out Time and Average Taxi In Time 6 Estimation of Unimpeded Taxi In Time 7 Estimation of Unimpeded Taxi Out Time Estimation of Actual Gate Out Time Actual or Estimated Wheels Off Time minus median Taxi Out Time by Airport by Carrier by Day by Hour (obtained from all Flights with OOOI Data ). Estimation of Actual Gate In Time Actual or Estimated Wheels On Time plus median Taxi In Time by Airport by Carrier by Day by Hour (obtained from all Flights with OOOI Data ). Estimation of Actual Wheels Off Time The median difference between the DZ message and Actual Wheels Off is computed by airport, by day for records that contain both of those pieces of data. This value is designated as the Gap DZ. The Gap DZ is subtracted from the DZ time for all flights that do not contain OOOI Data to obtain an estimated Actual Wheels Off time. Estimation of Actual Wheels On Time The median difference between the AZ message and Actual Wheels On time is computed by airport, by day for records that contain both of these pieces of data. This value is designated the Gap AZ. The Gap AZ is added to the AZ message time for all flights that do not contain OOOI Data to obtain an estimated Actual Wheels On time. Estimation of Average Taxi Out Time and Average Taxi In Time For records that do not contain OOOI Data , median observed Taxi Out Times and Taxi In Times (by airport by carrier, by day, by hour) are substituted. These values are also used for developing estimates of Wheels Off Time and Wheels On Time for records that do not contain OOOI Data . Estimation of Unimpeded Taxi In Time This number is estimated by calendar year for each carrier and airport reporting OOOI times through ASQP , ARINC, and (starting FY15) TFMS, based on analysis of taxi times under low traffic conditions. Estimation of Unimpeded Taxi Out Time This number is estimated by calendar year and season for each carrier and airport reporting OOOI times through ASQP , ARINC, and (starting FY15) TFMS, based on analysis of taxi times under low traffic conditions. FAA for You … Pilots Mechanics Airline Operators UAS Operators Educators and Students Consultants and Contractors All Visitors Airline Operators Educators and Students Consultants and Contractors Aircraft Aircraft Certification Aircraft Safety General Aviation & Recreational Aircraft Repair Stations Aircraft Certification Aircraft Safety General Aviation & Recreational Aircraft Repair Stations Airports Airport Compliance Airport Cooperative Research Program Airport Improvement Program (AIP) Airport Safety Engineering, Design, & Construction Environmental Program Major Airport Development News & Information Passenger Facility Charge (PFC) Program Planning & Capacity Resources Runway Safety Alaskan Region Central Region Eastern Region Great Lakes Region New England Region Northwest Mountain Region Southern Region Southwest Region Western-Pacific Region Airport Compliance Airport Cooperative Research Program Airport Improvement Program (AIP) Engineering, Design, & Construction Environmental Program Major Airport Development News & Information Passenger Facility Charge (PFC) Program Planning & Capacity Great Lakes Region New England Region Northwest Mountain Region Southern Region Southwest Region Western-Pacific Region Air Traffic Air Traffic By The Numbers Air Traffic Plans and Publications Community Involvement Environmental Reviews Flight Information International Aviation National Airspace System Obstruction Evaluation Separation Standards Technology Air Traffic By The Numbers Air Traffic Plans and Publications Community Involvement Environmental Reviews Flight Information International Aviation National Airspace System Obstruction Evaluation

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