Paris — Boeing suffered a fresh setback on the opening of the Paris Airshow on Monday as its engine supplier announced a delay for the US planemaker’s new 777X jet, while Airbus launched a rival plane aimed at the middle of the market.

GE Aviation said it had found unexpected wear in a part for the GE9X engine it is making for the 777X, the world’s largest twin-engined jet, forcing a delay of several months while it redesigns and tests the part.

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