Looks to me that some one forgot to tie down or properly put the container back inside a building. With jet engines around on a airport it is very easy for loose or improper stored items to be either sucked into a engine and thus ruining it or becoming a object that is thrown up by the jet blast that can serious hurt a person if not kill them.
I am glad that no one was injured with this. I believe some company is now going to be buying a new jet engine.
Yes the whole plane is just going to have to sit there till they can get a new engine there. Now it is not that hard to drop a engine and put a new one in it just takes time and the mechanics are just waiting to hear those dollar signs go off as they are hired to swap the engines.