Obstructions

Question 1

What is an object

Answer 1

any natural growth, terrain, or permanent or temporary construction or alteration, including equipment or materials used, and apparatus of a permanent or temporary character. This includes trees, construction cranes, well-drilling equipment, stockpiles, buildings, and parked vehicles

Question 2

the purpose for providing proposed construction to the FAA under Part 77 is to…

Answer 2

1. they can minimize the adverse effect to aviation by identifying potential aeronautical hazards
2. be able to revise published data or issue NOTAMs to alert pilots of the airspace changes resulting from the structure
3. be able to recommend appropriate marking and lighting to make the objects visible to pilots
4. depict obstacles on aeronautical charts for piloting and safety purposes

Question 3

form 7460-1. the form is required when any proposed construction or alteration falls within any of what categories

Answer 3

1. is greater than 200ft in height above ground level
2. is ‘near’ a public use or military airport, heliport, or seaplane base
3. is a traverse way that exceeds standards
4. is located on public-use or military airport or heliport
5. is requested by the FAA

Question 4

what does being ‘near’ a public-use airport men

Answer 4

if it is within 10,000ft of an airport having runways less than 3,200 feet
or within 20,000ft if the airports runway is longer than 3,200ft

Question 5

how many days are required in advanced notice to the FAA with the 7460 form

Answer 5

45 days

Question 6

what are the primary principle imaginary obstacle surfaces

Answer 6

primary, transitional, approach, horizontal, and conical

Question 7

primary surface

Answer 7

centered on the runway centerline and extends 200-ft past the runway end. the width varies form 250-1,000ft depending on the type of approach to the runway

Question 8

transitional surface

Answer 8

commences at the edges of the primary surface, perpendicular to the runway centerline, and transition to the horizontal surface. the slope is 7:1

Question 9

approach surface

Answer 9

begins 200ft from the runway end at the edge of the primary surface and extends outward form the ends. the slope can vary
20:1 or visual runaway for a distance of 5,000ft to ratios
34:1 for a non-precision for a distance of 10,000ft
50:1 for a precision runway for the first 10,000ft hen 40:1 thereafter to 40,000ft

Question 10

horizontal surface

Answer 10

is a level plane at 150ft above the runway elevation. determined by connecting the tangents of radii extending form the edges of the primary surface area at the ends of the runway. for visual runways it is 5,000ft, for all others it is 10,000ft. the area is intended to accommodate the safe operation and maneuvering of aircraft to perform circle-to land or missed approaches

Question 11

conical surface

Answer 11

starts at the perimeter of the horizontal surface and continues upward at the sloe ration of 20:1 for a horizontal distance of 4,000ft

Question 12

how can the result of a 7460 study come back

Answer 12

the FAA may resists, oppose, or recommend against the presence of objects or activities that would conflict with an airport design planning standard or planning recommendation

Question 13

what are the 6 possibilities form a part 77 study

Answer 13

1. the obstruction to air navigation is hazardous
2. the object or activity on or in the vicinity is objectionable
3. the need exists to alter, remove, mark, or light the object
4. the airport layout plan is approved
5. the proposed construction, enlargement, or modification to the airport would have an adverse effect on the safe and efficient use of navigable airspace
6. a change in operational procedure is reasonable or required

Question 14

who has the authority to prevent construction or alteration

Answer 14

the state and resides with he local regional or municipal zoning authorities