B777X
Not directly comparable, but the "impossible" inflight deployment of a thrust reverser on the Lauda Air 767 showed a couple of things:
1. the impossible does happen
2. a deliberate test of deployment of the thrust reverser at 10,000' was controllable while a deployment at the more realistic altitude of 30,000'+ was not
Will Boeing be conducting a certifiable test of one, then both wing tips, folding at operational altitudes and weights?
And, if you want to be really perverse, what if one or both became unlocked? Would the tip 'flap'? If so, what impact would / could that have on flight dynamics and structural integrity?