My point exactly BOAC .I completly agree with you,my question was due to that paragraf in the FCTM.
They say that in case of engine failure on final app you have to decide to continue or go-around.
In case you decide to continue ,then select flaps 15,speed vref 30+15kt.
or:
"If a go-around is required,follow the engine inoperative missed approach/go-around procedures."
Maybe you select flap15,increase speed,then decide to GA,and follow proc for SE.This would be ok in real life.
But in the sim,we did CAT 3A app,followed by eng fail at 100' then GA. So,that's why I've asked :flap 15 or 1?
Brgds Alex