Originally Posted by
NutLoose
The article mentions the A220, which is still a lot lighter than the 321. But, as already pointed out, it's about the flight manual approach angle clearance - 5.5 degrees required. (Plus crew training, but irrelevant is a/c not approved.) The expansion also allow a/c to hold by the departure threshold, whereas previously they had to enter and backtrack, so hourly movements greatly improved.