Laserfiche WebLink
AC 150/5300-4B CHG 3 <br />Appendix 9 <br />12/5/78 <br />(6) Cost and feasibility of relocating existing visual and <br />electronic approach aids such as threshold lights, visual <br />approach slope indicators, runway end identification lights, <br />instrument landing system (ILS), approach lighting system, <br />and runway markings. <br />(7) Effect of the threshold change on the present and future role <br />of the airport, including noise abatement. <br />c. Reference material which should be applied when evaluating threshold <br />change proposals includes: <br />(1) The latest approved airport layout plan and obstruction chart. <br />I£ available, the airport master plan should also be used. <br />(2) The proposed airport development shown in the current National <br />Airport System Plan. <br />(3) <br />The appropriate airport design standards. <br />(4) The operational characteristics of the types of airplanes the <br />runway is intended to serve and the types of operations, <br />including expected minimums. <br />6. LOCATING, DISPLACING, OR RELOCATING THE RUNWAY APPROACH THRESHOLD. The <br />runway approach threshold siting criteria are based upon aircraft <br />operational requirements and landing visibility. Therefore, the shape, <br />dimensions, and slope of the surface used for locating a runway approach <br />threshold are dependent upon the type of aircraft operations currently <br />conducted or forecast, the landing visibility minimums desired, and the <br />types of instrumentation available or planned for that runway end. <br />a. The runway approach threshold should be sited to provide for <br />maximum operational use of the runway pavement and to accommodate the <br />following pertinent conditions for: <br />(1) <br />Page 4 <br />Approach End of Runways Expected to Accommodate Landing Visibility, <br />Minimums Greater Than 3/7 of a Mile and Visual Runways,. No <br />object should penetrate a surface that starts at the runway <br />approach threshold and at the elevation of the runway centerline <br />at the runway approach threshold and slopes upward from the <br />runway at a slope 20 (horizontal) to 1 (vertical). <br />(a) Runways Expected to Accommodate Only Aircraft of 12,500 <br />Pounds (5 670 kg) or Less, Maximum Certificated Takeoff <br />Weight. In the plan view, the centerline of this surface <br />extends 5,000 feet (1 530 m) along the extended runway <br />centerline. This surface extends laterally 125 feet (38 m) <br />on each side of the centerline at the runway approach <br />Par 5 <br />• <br />• <br />