Originally Posted by
leffsu
Is that must be in landing configuration before pass the FAF in NPA？What is SOP said in your company?
If so, means that only use CONF 3 in NPA?
The problem in OEI is with selecting flap full in level flight i.e. at platform altitude. It has too much drag, the thrust will go to MCT causing problems with directional control and maintaining speed. So if landing in full the final flap should only be selected once established in final descent. Second problem could be with the NPA having step down descent. In that case obviously flaps to be maintained at three till the level step and then it's too late to change configuration so just land in Flap3.