Wing anti icing
I was wondering if somebody on this forum has experience with icing conditions on the Boeing 747. The AOM states that during icing conditions in a holding, the holding should be performed without slats extended. The reason for this is that the effect of your wing anti ice system is neglectable with slats extended. Therefore my question is what happens during the approach in icing conditions, where flaps (slats) must be extended. The same counts for take-off, where icing conditions start at ground level (assuming that the anti-ice fluid will leave the aircraft during rotation).
I hope somebody can help me regarding this "topic"
Thanks in advance