I have question about Actual Landing Distance (ALD) on MEL dispatched Aircraft.
My A320 was dispacthed with SEC3 inoperative. From MMEL 2.27 P8 said that Landing distance is increased by 5%. Therefore, my actual landing distance should be (ALD from 4.03)x 1.05.
But if I've got any Inflight Following Failure (IFF) such as an Anti-skid failed. Airbus recommends to calculate
ALD (MEL+IFF) = ALD from 4.03 x MMEL penalty (1.05) x Coef Anti-skid (1.75). It is not considered as a multiple failure! Is that sound?
Back to normal aircraft without MEL, if both failures occur inflight,
ALD (IFFs)= ALD from 4.03 x Coef SEC3 (1.25) x Coef Anti-skid(1.75)
what make the difference of landing distance? MEL SEC3 proc requires switch off SEC3 PB and pull out CB which is the same as that of SEC3 inops inflight?
