Fb_Gumby

And that is why in my original post on this subject, I made and exception for the seats in an aircraft. You are correct, the seats are designed to specific crash loads which I believe are 9G down and 9G forward.

Aircraft are designed to withstand specific flight loads, and except for the seats, they are not designed to withstand crash loads. So it seems to me that attributing the damage to a design weakness in this case (a crash) misses the mark. You cannot say there was a design weakness, because the wings were not designed to stay on in a crash. No aircraft wing is designed to stay on in a crash.