180/5 is possible, just not ideal. You can configure gear and flaps 30 at 180 knots. The airplane will slow nicely from 5 miles/1500' agl to reach stabilized approach by 1000' agl. Maybe I missed it somewhere in this string, but flaps 30 could have been selected long before 160 knots.
Lifted from 777 FCOM:
[-200LR, 777F, -300ER, -300ER/ULR]
1 Flap Limit Placard
Flaps extended speed limits.
Normal Flap Position Indication
Displays combined flap and slat positions when all surfaces are operating
normally and control is in the primary (hydraulic) mode. The indicator shows
continuous motion.
The indication is no longer displayed 10 seconds after slat retraction.
FLAP LIMIT
1 - 255K
5 - 235K
15 - 215K
20 - 200K
25 - 190K
30 - 180K
Last edited by TOGA!; 16th Jul 2013 at 05:40.