If you could read you would have noticed it's not 6 CRJs 2 months longer. Those 6 CRJs won't be transfered at all in 2015. They will be added to the second batch that starts in 2016. So it actually means 6 more CRJs than originally planned for over a year. Meaning 6 more all the way into 2017 if they take them at the same rate as planned.