At the destination aerodrome the landing distance available is 3000 m. The appropriate weather forecast indicates that the runway at the estimated time of arrival will be wet. For a commercial flight the mass of a turbojet aeroplane at landing must be such that the aeroplane can be landed within:
Landing performance calculation.
A commercial turbojet aeroplane must be able to land within 60% of the Landing Distance Available (LDA).
LDA = 3000 m
60% of LDA = 3000 x 0.6 = 1800 m
The runway being wet must also be factored by 1.15.
1800 m / 1.15 = 1565 m
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