Skip to main content

Risk Assessment Method to Support Modification of Airfield Separation Standards (2011) / Chapter Skim
Currently Skimming:


Pages 30-36

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 30...
... Airp. ADG Type of MOS Risk Level Expected # Yrs Risk < 1.0E-7 Risk < 1.0E-09 Expected Severity FAA Risk Classification Acceptable PHL III & IV Taxilane/Taxilane <1.0E-9 N/A Yes Yes Major Low Yes ANC VI Taxiway/Object <1.0E-9 N/A Yes Yes Major Low Yes ADS III Runway/Taxiway 1.0E-7 > 100 Yes No Catastrophic Medium Yes BDR II Runway/Taxiway 1.1E-7 > 100 No No Catastrophic Medium Yes MFV II Runway/Object 5.9E-8 > 100 Yes No Catastrophic Medium Yes N07 I Taxilane/Object 1.2E-9 N/A Yes No Major Low Yes JFK VI Taxiway/Taxiway <1.0E-9 N/A Yes Yes Major Low Yes EWR V Taxiway/Taxiway Taxilane/Object <1.0E-9 <1.0E-9 N/A N/A Yes Yes Yes Yes Majo r Majo r Low Low Yes Yes MSP IV Taxiway/Taxiway <1.0E-9 N/A Yes Yes Major Low Yes ORD V Taxiway/Object <1.0E-9 N/A Yes Yes Major Low Yes ORD V Taxiway/Taxiway <1.0E-9 N/A Yes Yes Major Low Yes HYA III Runway/Taxiway 8.8E-8 > 100 Yes No Catastrophic Medium Yes LCI III Runway/Taxiway 2.0E-7 > 100 No No Catastrophic Medium Yes SEA VI Runway/Taxiway 1.6E-6 N/A No No Catastrophic High 1 No 1 SEA VI Taxiway/Taxilane <1.0E-9 N/A Yes Yes Major Low Yes ASE III Runway/Taxiway 9.0E-8 > 100 Yes No Catastrophic Medium Yes ACK III Taxiway/Taxiwa y < 1.0E-9 N/A Yes Yes Major Low Yes ILG IV Taxiway/Object 2.8E-8 N/A Yes No Major Low Yes JYO II Runway/Taxiway 1.2E-7 > 100 No No Catastrophic Medium Yes TAN II Runway/Taxiway 8.0E-8 > 100 Yes No Catastrophic Medium Yes 1MOS approval conditions by the FAA restrict the use of the taxiway under specific conditions to avoid the situation of high risk.
Read the entire page →
From page 31...
... The frequency model is based on operational and weather factors, including a criticality factor that related aircraft performance under given conditions with the available distance for operation. The frequency model uses accident, incident, and normal operations data to quantify accident risk factors and provide an assessment of flight risk exposure.
Read the entire page →
From page 32...
... To facilitate the application of the methodology, risk plots are presented for each ADG, and when the analysis involves specific aircraft, risk plots based on wingtip clearance are provided. Recommended Risk Criteria for Taxiway and Taxilane Separations An extensive survey of historical taxiway and taxilane incidents helped assess the major factors involved in these events.
Read the entire page →
From page 33...
... Effort to Collect Aircraft Deviation Data during Landing and Takeoff Operations The development of risk plots for the airborne phase of landing used the FAA/ICAO CRM for instrument approach Cat I and II. The CRM model was based on the limited data available at the time it was developed.
Read the entire page →
From page 34...
... Kennedy International Airport LDVO Landing Veer-off MOS Modification of Standards MTOW Maximum Takeoff Weight NAS National Airspace System NASA National Aeronautics and Space Administration
Read the entire page →
From page 35...
... 35 NASB Netherlands Aviation Safety Board NLA New Large Aircraft NOAA National Oceanic and Atmospheric Administration NOD Normal Operations Data NPIAS National Plan of Integrated Airport Systems NTSC National Transportation Safety Committee (Indonesia) OCH Obstacle Clearance Height OCP Obstacle Clearance Panel OFA Object Free Area OFZ Obstacle Free Zone RESA Runway End Safety Area ROC Receiver Operating Characteristic RSA Runway Safety Area SARP Standard and Recommended Practice TAIC New Zealand Transport Accident Investigation Commission TERP Terminal Instrument Procedures TOVO Takeoff Veer-Off TSB Transportation Safety Board of Canada USACE United States Army Corps of Engineers
Read the entire page →
From page 36...
... 36 Acceptable Level of Risk. For regulations and special permits, the acceptable levels of risk are established by consideration of risk, cost/benefit, and public perception.
Read the entire page →

Key Terms

  • approach cat
  • risk plot
  • collision risk
  • risk level
  • runway edge

  • risk plots
  • missed approach
  • risk mitigation
  • risk matrix
  • wingtip clearance

  • specific aircraft
  • parallel taxiway
  • aircraft operation
  • sion risk
  • lision risk

  • faa risk
  • acrp report
  • taxilane incidents
  • criticality factor
  • separation standards

  • international airport
  • approach phase
  • tail height
  • maximum tail
  • risk criteria

  • airborne phase
  • deviation distribution
  • frequency model
  • aircraft located


    • This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
    More information on Chapter Skim is available.