Federal Aviation Administration 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

Federal Aviation Administration 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.

Federal Aviation Administration 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.

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Federal Aviation Administration 6 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

Federal Aviation Administration 7 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)

Federal Aviation Administration 8 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.

Federal Aviation Administration 9 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

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Federal Aviation Administration 12 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

Federal Aviation Administration 13 Thank you Questions?

Federal Aviation Administration 14 Contact Info Ron Sanders Central Flight Procedures Team ,