I have a quick question, at my local airport there is an abandoned 720, I was looking at its engines and the fan has these notches in dented into them.
Anyone know what could have caused hem and can the plane safely fly with them? - I am attaching a picture below. - I don't think they were caused during a singular event but over time, maybe due to particle ingestion, etc.
I am hoping to use this "phenomena", for lack of a better word, in a degradation assignment I have to do. Any nudges in the right direction would be greatly appreciated.
Thanks in advance.