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A runway has a total pavement length of 1080 m. The landing threshold is displaced 25 m from the beginning of the runway pavement. What is the Landing Distance Available (LDA)?

  • A

    1055 m

  • B

    1080 m

  • C

    1105 m

  • D

    1025 m

Refer to figure.
Landing Distance Available (LDA) is the runway length declared available for an aircraft landing. A displaced threshold is a landing threshold that is set back from the physical beginning of the runway pavement. The area between the physical runway start and the displaced threshold is still usable for take-off rolls and landing rollout, but it cannot be used for landing touchdown.

Runway total length = 1080 m
Displaced threshold = 25 m
 
LDA = 1080 - 25 = 1055 m

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