A.
notifies purser for emergency evacuation preparation, as well as the nature/scale of the emergency and available time for preparation.
B.
use passenger broadcast to inform passengers the nature of the emergency and further steps to be taken.
C.
inform ATC about the decision of emergency evacuation after landing and ask for emergency assistance.
D.
inform passengers and cabin crew with broadcast at 300-500ft AGL that, the aircraft will land soon to ensure all persons in cabin should be in anti-collision posture