I'm wondering if this is a troll question.....
there are some BIG threads already about AsA - try reading through them and see if you can find some reasons in there
http://www.pprune.org/dg-p-reporting...cancelled.html
http://www.pprune.org/dg-p-reporting...-shortage.html
http://www.pprune.org/dg-p-reporting...ces-admit.html