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What constitutes the “Runway Environment”?(HINT:Tere are 12 things)

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What constitutes the "Runway Environment"?(HINT:Tere are 12 things)

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1 Answers

  1. John D. Collins on Jun 14, 2011

    If you are referring to the requirements for operation below the DA/DH or MDA, ten items are listed in 91.175 (c)(3), but (vii) and (ix) each have two items listed and (i) has the addition of red terminating bars or red side row bars to enable continued descent below 100 feet DH/MDH:


    (i) The approach light system, except that the pilot may not descend below 100 feet above the touchdown zone elevation using the approach lights as a reference unless the red terminating bars or the red side row bars are also distinctly visible and identifiable.
    (ii) The threshold.
    (iii) The threshold markings.
    (iv) The threshold lights.
    (v) The runway end identifier lights.
    (vi) The visual approach slope indicator.
    (vii) The touchdown zone or touchdown zone markings.
    (viii) The touchdown zone lights.
    (ix) The runway or runway markings.
    (x) The runway lights.


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