So looked at a 330 a few days ago. There was a lot of caulking in a groove between the helm and cabin door, on the port side where the cabin door fits into, as well as the aft seat base behind the helm seat where it meets the cockpit wall. Are these typical leak areas? The was some evidence of water on the floor at some time. But zero evidence of leaks in the headliner, port holes, walls, etc. Owner says no leaks since he's owned it.