Shortfuel: you posted some time back:~ 2007
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I can only imagine that your company decided to associate WAI deselection during final with L/G extension.
Airbus proc extract:
-FLAPS FULL SELECT
Select FLAPS FULL below VFE.
-CONFIRM/ANNOUNCE "FLAPS FULL"
Check deceleration towards VAPP.
-A/THR CHECK IN SPEED MODE OR OFF
-WING ANTI ICE OFF
Only switch the WING ANTI ICE to ON, in severe icing conditions.
For Airbus, it comes after Flaps extension.
I don't think that it's related to OEI condition as you quote FCOM 3.03.18, normal procedures.
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Please explain to me how the above relates to the WAI efficiency being maintained when the slats are extended. Surely if full protection was given then Airbus would recommend it`s use until after landing ( like with the Engine AI ) My contention has always been that the WAI efficiency is much less with slats extended. Your reference to greater wing camber with slats out leading to greater ice accretion would not matter if the slats continued to be totally protected.