I stand to be corrected, but believe the A320's will start to be replaced in 2019 and that the process to replace them all will take 5 years or so. A lot can change in that period of course.
Can I just add that I've copied the superb summary of the runway provided by Expressflight. It's too good not to. Will try not to infringe his copyright if I refer to it elsewhere!
Last edited by DC3 Dave; 10th Aug 2017 at 19:58.