CEBU PACIFIC AIRBUS A321NEO CEBU TO MANILA FLIGHT | Flight Experience 

Because long aircraft

That is not Leap Engine, it is PW Purepower GTF engine, when you hear a Whale sound roar then disappear afterwards, and on the engine inner wall there is a green paint, only Purepower has that kind of color paint sort of company color, that is one way to identify their engine, I thought Cebu pacific only has one engine supplier but I was wrong some of their NEO's have equipped PW engines.