Nearly a decade ago All Nippon Airways (ANA) brushed aside doubts about Boeing's as-yet unbuilt 787 "Dream-liner" and placed the biggest launch order for a new jet in the planemaker's history: 50 aircraft. Today, Japan is the world's largest market for the 787. ANA and its domestic rival Japan Airlines (JAL) between them fly half of the 49 Dreamliners in service. As they have now discovered, that makes them the guinea-pigs in a complex aviation experiment.
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