Oh, you meant casualties as in crew members... In that case I have no idea.
Does Steve have it set up so that operating on a skeleton crew lowers the crew grade of the ship, with the associated penalties?
Probably the next step would be to go through the mock refit process, then use the "Quick OOB Creation" to magic up a brand new version of the broken PDC. You should then be able to dismantle the damaged PDC. The downside with this method would be that you will lose all Crew Grade bonuses that you may have with a seasoned crew, although I don't know if PDC crew grade bonuses ever get that high.