Oh my bad, not destroyed wings, but disabled meaning that if a single fighter's wreck survives the battle then it is almost guaranteed to be repaired. For your question about the stats just like the stats about them increasing repair speed, I do not believe is accessible without delving into the code, something that I am a bit to incompetent to accomplish. If you do need proof you could try it yourself
, I myself speak from captaining an Astral with no points in the repair character skill, getting my broadswords back 50-60 percent of the time.