Bombardier Aerospace announced today that Croatia Airlines of Zagreb, Croatia has signed a firm order for four 76-seat Q400 high-speed airliners and has taken options on two additional Q400 aircraft. The value of the firm orders, based on the list price for the Q400 aircraft, is approximately $105 million US. The Q400 aircraft will replace three 48-seat ATR42 turboprops in Croatia Airlines' fleet, which also includes four Airbus A320 and four A319 aircraft. "The high speed and excellent