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The 787 prototype designated for static tests (ZY997) complete the ultimate load test where the wings are subjected to loads up to 150% of the design limit. The airframe should withstand these loads and the company could choose either to stop there or to continue until destruction. This test (officially called Condition 18b) highlights the flexibility of the composite wing. In normal conditions the wing deflects up to 3m upwards at the wingtips. When subjected to these high loads the wingtips (at 150%) were deflected approximately 7.5-8m, more than the destruction point of the metallic wing of 777.

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