I suspect this a/c was broken up by a powerful Cb.
There are many precedents for this and the 'facts', such as they are, don't contradict this.
Is there anyone on here with intimate knowledge of the A330 structure that could refute this? Is it a particularly 'strong' a/c, like the Bae 146 for example? I suspect not.
I've had the misfortune to fly in a fully developed Cb- entirely my own fault I may as well add.
If I learned one thing about flying that day it's this:
Don't.