Boeing give a hint under the adverse weather section of the FCOM when landing with ice on the airframe and recommend adding 10 knots to Vref plus other additives already applied - up to a max additive of 20 knots. Boeing goes on to say "bleeding off the 10 knots (ice additive) below 200 ft. This would suggest that the deliberate bleeding off the half HW additives should start at 200 ft. It is a tenuous example, but Boeing tend to be vague in such areas.
I always reduced the steady headwind approaching 50 ft to a minimum of vref or any necessary increment such vgust of Vref ice.
But I cant find the info in my airline fcom supp info.
Could someone paste and copy please?
Thanks.