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

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.

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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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20 to 1 Approach Surface

(TERPS) Federal Aviation Administration 4

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20 to 1 Penetrations

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Identified by : Geographic Information System (GIS) tool

- Mandatory biennial reviews / OKC ANP - During instrument procedure amdts

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Reported by:

Various offices: Regional FPT, ANP, GDOT, FC • Result in loss of night time capability

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Daytime visibility restricted to 1 SM Federal Aviation Administration 6

Identification of 20 to 1 Penetrations

Typical scenario:

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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 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

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Airport owner/sponsor must provide a written report and copy ADO

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No response received within prescribed timeframe will result in IAP visibility minima and night capability as required.

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Airport Owner / Sponsor Response

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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.

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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 Federal Aviation Administration 9

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Possible Mitigation Actions

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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

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Questions?

Thank you

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Contact Info

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Ron Sanders Central Flight Procedures Team 817-321-7615, [email protected]

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