[lippy]

I ended up locating the nut and eventually knocking it down to the pan. I had a pretty good view inside the pan with the borescope, but I couldn't find it. After spending 2-3 hours on this, I finally removed the pan. The nut was in the pan, but behind one of the trap doors. I never would've gotten it out, so removing the pan was the right thing to do. The Right Stuff is only the right stuff when you don't have to remove it.

Now onto cleaning it up and reinstalling the pan, for the umpteenth time. Probably in a few weeks.