Rolls-Royce joined Airbus and Qatar Airways today in celebrating delivery of the first Airbus A350 XWB to enter service. The jetliner is powered by Trent XWB engines, the sole power plant available for the A350 XWB. More than 1,500 engines have already been sold to 40 customers. Sales of the Trent XWB account for over half of the Rolls-Royce civil aerospace order book. (Sources: Rolls-Royce, Airbus, 12/22/14) Gulf Coast note: Trent engines, including the XWB, are tested at Stennis Space Center, Miss.