17.07.2015 Views

Acknowledgments US Department of Transportation - BTS

Acknowledgments US Department of Transportation - BTS

Acknowledgments US Department of Transportation - BTS

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Appendix EData Source and Accuracy StatementsChapter 2 SafetyAIR DATATABLE 2-1. <strong>Transportation</strong> Fatalities by ModeTABLE 2-2. Injured Persons by <strong>Transportation</strong> ModeTABLE 2-3. <strong>Transportation</strong> Accidents by ModeTABLE 2-4. Distribution <strong>of</strong> <strong>Transportation</strong> Fatalities by ModeTABLE 2-7. <strong>Transportation</strong>-Related Occupational FatalitiesTABLE 2-9. U.S. Air Carrier Safety DataTABLE 2-10. U.S. Commuter Air Carrier Safety DataTABLE 2-11. U.S. Air Carrier Fatal Accidents by First Phase <strong>of</strong> OperationTABLE 2-12. U.S. Commuter Air Carrier Fatal Accidents by First Phase <strong>of</strong> OperationTABLE 2-13. U.S. On-Demand Air Taxi Safety DataTABLE 2-14. U.S. General Aviation Safety DataNational <strong>Transportation</strong> Safety Board investigators perform onsite and <strong>of</strong>fsite investigations <strong>of</strong> all accidents involvingU.S. registered air carriers operating under 14 CFR 121, 14 CFR 135, and general aviation U.S. <strong>Department</strong> <strong>of</strong><strong>Transportation</strong> (<strong>US</strong>DOT), Federal Aviation Administration (FAA) regulations. The investigators compile information onfatalities and injuries for all accidents. The counts for fatalities and serious injuries are expected to be extremelyaccurate. (See glossary for serious injury definition.)Exposure data (aircraft-miles, aircraft-hours, and aircraft-departures) are obtained from the FAA, which in turn getssome <strong>of</strong> its exposure data from the <strong>US</strong>DOT, Bureau <strong>of</strong> <strong>Transportation</strong> Statistics, Office <strong>of</strong> Airline Information (OAI)and other exposure data from its own General Aviation and Air Taxi Activity and Avionics (GAATAA) Survey. The OAIdata represent 100 percent reporting by airlines. Tables that include air carriers (14 CFR 121, scheduled andnonscheduled service) and commuter air carriers (14 CFR 135, scheduled service only) use OAI exposure data.Tables that include on-demand air taxi (14 CFR 135, nonscheduled service) and general aviation use GAATAASurvey results. For information about the GAATA Survey, please refer to the chapter 1 data accuracy statement fortable 1-9.The coefficients <strong>of</strong> variation for aircraft-hours vary by year, but are usually in the 9 to 10 percent range for on-demandair taxi and are approximately 2 percent for general aviation.TABLE 2-15. Number <strong>of</strong> Pilot-Reported Near Midair Collisions by Degree <strong>of</strong> HazardNear Midair Collision reports are provided voluntarily by air carriers, general aviation companies, and the military, andthis information is added to the Near Midair Collisions System database. Factors that may influence whether or not anear midair collision is reported include the pilot's or other crew members’ perception <strong>of</strong> whether a reportable near

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!