UPDATE 2-Bombardier wins order for up to $3.29 bln from Delta
* Delta to replace 50-seater jets with CRJ900
* Firm orders for 40 jets valued at $1.85 bln
* Shares of rival Embraer fall
Dec 6 (Reuters) - Bombardier Inc said Delta Air Lines Inc placed firm orders for 40 NextGen jets, with the option to buy another 30, in a deal valued at up to $3.29 billion.
Delta, the U.S. No.2 airline, said the purchase is part of its domestic fleet restructuring to replace less efficient, small aircraft with bigger jets.
The firm orders were valued at $1.85 billion, Bombardier said.
Shares of rival Brazilian aircraft maker Embraer SA fell 7 percent - their biggest intraday loss in nearly five months - following the news.
Bombardier last month won its biggest jet deal of $7.8 billion from Swiss charter operator VistaJet for up to 142 Global aircraft.
The Canadian aircraft and train maker's stock is trading at about 8 times analysts' expectations for 2012 earnings, according to Thomson Reuters data. Continued...