ًA320 landing phases and techniques 

What is the main landing Gear clearance ?

This is the hight  of the main landing gear over runway threshold if the aircraft fly at the correct flight path with the 3 degree.

 for the A320 is about (20 ft ) .

What is the ALD ( actual landing distance ) ?

Is the distance used on a dry runway from the crossing of the runway threshold at 50 ft until full stop using maximum manual breaking with no reverse .

What is the RLD ( required landing distance )?

It’s an ALD ( actual landing distance ) factored for 2 runway condition wet or dry . 

For calculating the RLD for wet = ALD x 1.15 

RLD Dry = ALD x 1.67 

What is the 4 phases of the landing ? 

Flare , derotation ,rollout and breaking 

1- FLARE 

To be continued