Rolls-Royce’s Trent XWB engines have run for the first time on the A350 XWB (MSN001) following the start-up of the Auxiliary Power Unit (APU), as part of the preparations for the aircraft’s maiden flight.
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The Auxiliary Power Unit (APU) (the small turbine engine under the tail) is used for power on the ground. The start-up test of last week consisted on checking if the APU leaked of oil or fuel, and after that, run the air-conditioning and other aircraft systems and circuits.
Rolls-Royce has planned to make 16 flight-compliance engines for the flight test campaign; 10 will be dedicated to A350 flight-testing. One (called Engine 21001) is a “training” engine used to prove tooling and train the assy-fitters, 3 will be spares, and a further 2 will be built for contingencies.
Trent XWB engine is the largest yet produced by Rolls-Royce, with a 3m fan diameter and blades 76mm longer than in the A380's Trent 900. It was certified by EASA (European regulators) in February/2013 and it is the result of the work of a big team involving 75 suppliers worldwide, 16 Rolls-Royce plants, 12 partners and 25 dual sources. A team currently working in the engine for the A350-1000.