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Airport 20 to 1 Approach Surface

Airport 20 to 1 Approach Surface. Oklahoma Airport Operators Association, (OAOA)/ American Association of Airport Engineers, (AAAE) Annual Conference Ron Sanders Southwest Regional Flight Procedures Team March 10, 2015. 20:1 Approach Penetrations.

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Airport 20 to 1 Approach Surface

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  1. Airport 20 to 1 Approach Surface Oklahoma Airport Operators Association, (OAOA)/ American Association of Airport Engineers, (AAAE) Annual Conference Ron Sanders Southwest Regional Flight Procedures Team March 10, 2015

  2. 20:1 Approach Penetrations • Criteria developed by Flight Standards in the late 1990s • Requires clear 20:1 Visual Approach surface for night minimums • All terminal procedures are currently reviewed every two years, as required by AFS policy. • During that periodic review, or other amendments, the TERPS Specialist in AeroNav Products may identify obstacles that penetrate the 20:1 visual surface.

  3. 20:1 Penetrations (continued) • Background: During Oct 2012, Flight Standards Division AFS-400 required immediate NOTAM action resulting in “Not Authorized (NA) at night when 20:1 identified. • Current Policy: Effective Jan 6, 2014, refined policy considered “Risk” factor of the identified penetrations and allowing a validation period (30 days). • Validation: To verify if the obstacle exists or has been removed, and/or if the obstacle is lighted.

  4. 20 to 1 Approach Surface (TERPS)

  5. 20 to 1 Penetrations Identified by : • Geographic Information System (GIS) tool - Mandatory biennial reviews / OKC ANP - During instrument procedure amdts Reported by: ∙Various offices: Regional FPT, ANP, GDOT, FC •Result in loss of night time capability • Daytime visibility restricted to 1 SM

  6. Identification of 20 to 1 Penetrations Typical scenario: • During biennial review of airport’s procedure(s) OKC development branch identifies non-validated penetrations. - - Specialist’s findings are forwarded to Flight Procedures Team (FPT), assigning each penetration with risk assessment of high, medium or low. - - FPT adds GoogleEarth overlay to the file (.kml)

  7. 20 to 1 penetrations (cont) - - Within 3-business days, file is forwarded to airport requiring sponsor to validate each penetration ASAP, but no more than 30-days / ADO copied • Airport owner/sponsor must provide a written report and copy ADO • No response received within prescribed timeframe will result in IAP visibility minima and night capability as required.

  8. Airport Owner / Sponsor Response • If 20 to 1 penetrations determined invalid - - FPT will notify applicable offices to update airport’s data file(s); no action required to restrict or modify subject IAP. • If 20 to 1 penetrations determined valid: - - Submit written compliance plan Mitigation - - Remove, light or lower - - VGSI can be used as mitigation when approved by Flight Standards

  9. Possible Mitigation Actions • Visual Glideslope Indicator (VGSI) - Apt Mgr submits Form seeking AFS approval • Apply ILS / LOC / LPV / LP Full-Scale Deflection - Calculation, conducted by Aero Nav Products when trying to mitigate 20:1 penetration vs restricting night mins • Restrict only CAT C/D approach category minimums vs restricting CAT A/B/C/D • If penetrations are outside CAT A/B area

  10. Thank you Questions?

  11. Contact Info • Ron Sanders • Central Flight Procedures Team • 817-321-7615, ron.a.sanders@faa.gov

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