Well, if it didn't crash due to a wing failure I'd say the structure is probably ok A full depth spar like that in a compositie structure should be very strong, not sure exactly how strong, but I think most wings are done that way when they're composite. I can't be sure, but it looks like all the spar in my Super Bandit composite wing is all balsa too, what might be behind it I don't know, but from a quick look it looks all balsa