de facto:
Your single engine flaps 15 speed was going to be higher than 180kts?
I thought SE circling is to be done with Gear UP, flaps 10 ,speed 170 kts on the 737 and gear DOWN flaps 15,flaps 15 speed on both engines.
In both cases still under CAT C.
FAA inspector = TERPs procedure. CAT D circling, 141 KIAS, or above.