Just to confirm yes we do have aircraft on rotation for maintaince and this is partly the reason for the reduced schedule. Also the Pax numbers do tend to drop for the winter but not enough to warrent dropping the services.
I work for AA and I'm galway based and we have no idea what the reasoning is behind it. I am aware that Galway airport are causing some problems with the development of the Airport and maybe thats why.
We have a big meeting next week so maybe they'll tell us then.