Good point about it being normal for stuff to break during a stress test. However, it seems the door blowing off is not something that normally happens and that to me is more worrisome than if it was a common failure when the stresses greatly exceed the theoretical limits.

>Former Boeing Engineer Dr. Todd Curtis runs Airsafe.com and said this doesn't happen often. "I've never heard of a case where a door popped off like this during a stress test before," he said. "Doesn't mean it hasn't happened before, I'm just not aware of it."