Quid-
"Do you mean 2.5 nm in the procedure design, or 2.5 when flying the approach? In the US, I've not heard of this. ???"
2.5nm when flying the approach....
Hudson-
"Boeing (in the 737 anyway)recommend that initial flap selection on approach be carried out in level flight "
Can't find any such recomendation in the FCTM- atleast the new version- though I do remember reading about "not using flaps as speedbrakes". Even on a descent if you would be extending flap to say 5 from UP, and were in say LVL Change mode, the ROD would reduce to about 500fpm and the speed would reduce down to the selected maneuvering speed. So I dont think extending Flap during a descent should be construed as "using Flap as Speedbrakes".
Thanks all for sharing your thoughts- Keep em Coming!!