Offer to replace it (and be ready to). However, the owner will probably decline.
I had a crew drop 2 handles overboard in the same race. After the second one I told him to replace it. 2 in one day is not cool, it's careless. I'm not careless with my crew's lives or equipment they bring, no sense to go throwing my stuff over the side.
I still race with him, and he's a good guy, and I certainly appreciated him replacing the handle. I also like having him on board. It's a case by case thing. Since you were a stand-in crew, I'd at least offer. You were the one that dropped it!