WHETHER BY design or by circumstance, the competitive battle between Boeing and Airbus is morphing day by day into a titanic tussle between Boeing/General Electric on the one hand and Airbus/Rolls-Royce on the other. Boeing's 777-300ER/-200LR/-200F and 747-8 are all single-source GE engine programs and the 737NG is exclusively a CFM56 program. Airbus's A350 XWB and A340-500/-600, by contrast, are powered exclusively by the UK engine manufacturer's Trent family. Some analysts in France and ...

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