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Old 28th Dec 2008, 21:02
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Ivasrus
 
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A380 wake turbulence - it's wider also

Airservices Australia has re-written A380 wake turbulence standards in the application of parallel approaches to offset threshold medium-spaced parallel runways as applies to Sydney. See map

Previous situation: 34L and 34R approaches were treated independently for application of wake turbulence (lateral separation > 0.5 NM).

New temporary instruction (precis): When A380 on final 34L, wake turbulence spacing is applied to aircraft on 34R final when there is sufficient crosswind from the left at 2000 FT.

This is the result of a single encounter where a SF34 had a "severe" wake turbulence encounter behind an A388 on the parallel approach. There was approximately 20kts crosswind at 2000 FT. It will be interesting to see the outcome of further investigations and whether or not ICAO will review the standard. There is a giant can of worms being opened here.
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