Republic Airways (for Shuttle America [for United]) orders 50 E-175s!

[AA 1818]

http://finance.yahoo.com/news/embrae...110300540.html

Embraer S.A. and Republic Airways Holdings Inc., operator of the largest E-Jets fleet in the world, announced a contract today for the sale and purchase of 50 firm E175 jets. The value of the firm order, which will be included in Embraer's 2014 third-quarter backlog, is estimated at USD 2.1 billion, based on 2014 list prices. The aircraft will be operated for United Airlines under the United Express brand.

So, looks like Embraer is finding the order to fill the slots before production of the E2s. Great news. The article was not very explicit, but I wonder what aircraft these are going to replace.