Because the profile is that way. We’ll use flaps 10 if on GS and need to go down while still doing an ATC requested speed of 180ish knots. Flaps 10 officially isn’t on the profile view below.
Flaps 1 about 225-210.
Flaps 5 about 180-200. (Or around 210 if need to descend more).
Gear down, flaps 15, bug 15 or about 160.
Flaps 25, bug towards final target speed, and
Flaps 30 landing checklist.
If it’s flaps 40, I’ll still call 30 first, make sure we’re decelerating and below Vmax40 and then call flaps 40.
Full disclaimer. “Glideslope alive” as gear down flaps 15 and “approaching glideslope” flaps 25 are the official profile, just like it was for the CRJ, but reality is you could have GS alive waaaay out there and even capture way back at 4-5000 ft. Just do what it takes to be about flaps 5-10 and 180 knots until about 2000 AGL and then configure. In sim world do the exact profile, but real world, it’s okay to delay until closer in.
Point is, the profile shows that no matter how you configure, call gear down flaps 15, then have a callout for flaps 25, and then flaps 30/40.
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