Ryanair single pack operations?
On a recent flight with Ryanair, I noticed that the entire flight was done with one Pack switched off until descent, at which point both packs were operating. I guess there is a fuel savings in operating in this fashion. I was wondering if it is normal for Ryanair to fly with just one pack whenever operationally practical to capitalize on the fuel savings, or would this have been a one-of for some other reason?