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Boeing has begun test flights of a 747-8 featuring a package of performance improvements that promise a 1.8 per cent fuel burn saving.
The performance improvement package includes improvements to the GEnx-2B engines and flight management computer (FMC) software.
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The test program will validate the design changes and demonstrate the operation of the horizontal tank fuel system on the passenger version of the 747-8, which was deferred from the initial deliveries. The new configuration will first deliver in early 2014 and be available for retrofit. Entry into service of the new engines and FMC software will take place in late 2013.
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