Sorry -- unless you are being funny or sarcastic (& perhaps you are, and if so, I apologize) -- your ability to spell and write is pretty bad... it's falling by the "way side," and "due to," and not do too ... I don't like being so blunt, but I find it pretty unbelievable that anybody who posts on a message board can't be a little more aware of their spelling and grammar -- If you are inquiring about a Y1, then I assume you are an exec or higher-up with some company. Surely you went to school. For your own sake, not for mine or anyone else reading this, do something to improve your spelling and grammar. I am a 24-year retiree with this airline, a college graduate, former high school teacher.. and many of us at US Airways are/were college-educated and can spell, or at least know how to use spell-check if we are not sure. Truly sorry; I do not mean to be rude -- but for your own good and future, learn some grammar if you are going to post.