FAA, NTSB Investigate United 777 Post-Takeoff Close Call - AVweb

During testing, the 777 wing failed catastrophically (and explosively) at 154% of its design load limit. I suspect it could’ve handled double the load of this incident (5.4G) without breaking a sweat.

https://www.youtube.com/watch?v=Ai2HmvAXcU0