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Airport 20 to 1 Approach Surface

Airport 20 to 1 Approach Surface. Georgia Airports Association (GAA) Annual Workshop Cindy M Hintz Eastern Flight Procedures Team March 14, 2014. 20:1 Approach Penetrations. Criteria developed by Flight Standards in the late 1990s

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Airport 20 to 1 Approach Surface

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  1. Airport 20 to 1 Approach Surface Georgia Airports Association (GAA) Annual Workshop Cindy M Hintz Eastern Flight Procedures Team March 14, 2014

  2. 20:1 Approach Penetrations • Criteria developed by Flight Standards in the late 1990s • Requires clear 20:1 approach surface for night minimums • Visual aids (VGSI) such as VASI or PAPI were designated as a possible mitigation • 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/reported by various offices: EFPT, ANP, GDOT, FC and soon, Geographic Information System (GIS) tool - Mandatory biennial reviews / OKC ANP - During instrument procedure amdts • 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 EFPT, assigning each penetration with risk assessment of high, medium or low. - - EFPT 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 - - EFPT 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 - - Remove, light or lower - - Actions taken per risk Assessment criteria

  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 ANP 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. Mitigate by Aircraft Category • Most common GA 20 to 1 issue - - Runway type often, e.g., BII - - Charted minima CAT C/D - - CAT A/B begins at +/- 200 FT - - CAT C/D begins at +/- 400 FT • Airport cannot clear larger surface area - - Other mitigation N/A (VGSI/Deflection) - - Restrict CAT C/D minima only

  11. Jim Hamilton L.B. Owens (KCUB), SC • RWY 31 20 to 1 penetrations - Clearing project lasting several years - Received official notification - Provided compliance plan, VGSI checklist and initiated flight check within 30 day window - EFPT forwarded to OKC requesting temporary VGSI mitigation and requested OKC ANP perform check of full-scale deflection and evaluate CAT A/B vs CAT C/D penetration(s)

  12. VDP or DA

  13. Thank you Questions?

  14. Contact Info • Cindy M Hintz • Eastern Flight Procedures Team • 404-305-5956, cindy.m.hintz@faa.gov

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