Hmmm... Well if the engine got wet that's kinda bleh, and then any electrical stuff must be shot too, since the engine was waterlogged I assume a lot of the rest of it had contact with water and only the magical parts must be working. He'll get it fixed but it won't be the same unless it was Al Bhed tech to begin with. Also I'm assuming Nai started it right? That's what would break everything haha.

So in short, shits fucked yo (At least for real world machines, I'm assuming Machina follows similar rules though.). 

Magic isn't my job, so I assume that works.