Airline Fleet Mix
Hi guys, just want to know what are the pros and cons, and why some airlines have a Fleet of 2 or more aircraft from different manufacturers serving the same mission +/- range & seats, e.g. having A320 and B738, A321 and B739, CRJ200 and ERJ145, like China Eastern, Turkish Airlines and some other more, would't be more cost effective to have just one type if the difference from both planes are not that big??
Thanks and happy ldgs!
Rgds.