Obstruction Evaluation “What are all these surfaces?” 2015 ... · – obstructions should be...

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Obstruction Evaluation“What are all these surfaces?”

GAA Spring ConferenceFebruary 19, 2016

Presented ByAlan Hood, Airport Safety Data Program Manager

Georgia DOT

Obstruction Evaluation Surfaces

• Categories of approach surfaces for GA Airports.

– State Licensing

– FAA Part 77

– FAA TERPs Visual Surface (20:1)

Approach Surfaces and Obstruction Removal


• State Licensing– 3 configurations - based on runway length

• < 4,000’• 4,000’ – 4,999’• 5,000’ +

– Meets visual approach criteria from design guide

• Surface starts at threshold

• Surface needs to be clear to meet the minimum state licensing criteria

• Generally least restrictive of the three surfaces

• Airports inspected biennially

GDOT Airport Licensing Approach Standards

Obstruction Evaluation Surfaces14

32

<4000’

120’

300’

To3000’

14

32

250’

2250’

4000’ – 4999’

14

32

400’

1800’

>5000’

1000’

To 10,000’

700’

To 5000’

15:1

20:120:1

500’



• Obstruction Removal– obstructions should be removed immediately or removal efforts

should be initiated as soon as possible with written plan provided to GDOT by specified date in letter.

– if removal is not possible, displace threshold

• Documentation of obstructions: biennial inspection letter

• Notification– Alan Hood, Airport Safety Data Program Manager and– GDOT Project Manager



• Generally most restrictive, used as screening criteria• 9 configurations:

Based on runway category and type of approach<12,500lb - visual = A(V)<12,500lb - visual - opposite A(NP) = A(V) op A(NP)<12,500lb - non-precision = A(NP) >12,500lb - visual = B(V)>12,500lb - visual - opposite D/PIR = B(V) op D/PIR >12,500lb - non-precision @ > ¾ mi visibility = C>12,500lb - non-precision @ > ¾ mi visibility - opposite D/PIR = C op D/PIR>12,500lb - non-precision @ < ¾ mi visibility = D>12,500lb - precision = PIR

• Surface starts 200’ from the end of the runway• Surface should be clear to meet FAA 5010 Safety Data Inspection

Program criteria• Airports inspected biennially

FAA Part 77 Approach Standards


14

32

C

500’

14

32

A(V)

250’

14

32

B(V)

500’

14

32

A(NP)

500’

14

32

D

14

32

PIR

1000’1000’

20:1 20:1 20:1

34:1 34:1

50:1

5,000’

10,000’

40,000’FAA Part 77 Approach Standards


• Obstruction Removal– Obstructions should be removed or provide schedule for removal

• Documentation of obstructions:• biennial inspection letter• FAA 5010 report

• Notification Required– Provide sketch and coordinates of cleared area– Alan Hood, Airport Safety Data Program Manager and– GDOT Project Manager– GDOT will coordinate with FAA to remove from FAA database

FAA Part 77 Approach Standards


Who is Responsible?•Ultimately the Sponsor

-State Licensing and Part 77 Inspections: When obstructions are identified in an inspection, they become a liability.

-State Licensing surface obstructions could lead to denial of license.


• Surface starts 200’ from threshold

• 20:1 Approach Slope

• Obstructions should be mitigated to maintain night minimums

• When are procedures reviewed?– Any request for change in approach, name change, LOC-ID

change, runway numeral change, etc– FAA performs review of airport’s terminal procedures every 2

years

FAA TERPs Visual Surface Standards (20:1)


14

32

C

500’

14

32

A(NP)

500’

20:1

34:1Surface for Categories A – D are all same size

now

400’

20:1 20:1

400’



• Obstruction Removal– mitigate obstructions by:

• removal• lighting• PAPI waiver – requires FAA Flight Standards approval

– obstructions should be mitigated to maintain nighttime procedures.

• Obstruction removal previous to “20:1” letter from Flight Procedures.– Sketch and coordinates of cleared area– Alan Hood, Airport Safety Data Program Manager and– GDOT Project Manager– GDOT notifies FAA to update database


Obstruction Evaluation SurfacesFAA TERPs Visual Surface Standards (20:1)


•Ultimately the Sponsor

-Sponsors are also responsible for ensuring the TERPs Visual Surface is clear. Flight Procedures uses the FAA surveyed obstruction database to review procedures.

-Obstructions do not automatically disappear from database with a new survey.

-Must submit sketch with coordinates and boundaries of cleared areas to get obstructions removed from database.

***If you have been notified you have obstructions by Flight Procedures – then you validate the obstructions in writing. No survey or coordinates and boundaries required unless you are topping obstructions.

Who is Responsible?


• Using Google Earth – 5000’ Runway with GPS Approach

• State Licensing Approach

• FAA Part 77 Category C

• TERPS 20:1

Graphic Representation – 3 Surfaces


400’ Inner Width – at

Runway End

State Licensing -

5000+20:1


500’ Inner Width – 200’ from Runway

End

FAA Part 77 –Category C

34:1



End

TERPS 20:1


State Licensing/

FAA Part 77/ TERPs 20:1


• Using Google Earth – 3700’ Runway with GPS Approach

• State Licensing Approach

• FAA Part 77 Category A(NP)

• TERPS 20:1

Graphic Representation – 3 Surfaces


120’ Inner Width – at

Runway End

State Licensing -

-400015:1



End

FAA Part 77 –Category

A(NP)20:1



End

TERPS 20:1


State Licensing/

FAA Part 77/ TERPs 20:1

Obstruction Evaluation SurfacesThreshold Citing Table – AC 150-5300-13A

Obstruction Evaluation SurfacesQuestions?

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