Skywatcher1 posted a very important problem that most likely applies to all late model Newmars but was posted
here in the New Aire Observations thread.
Every basement door on the NA (and most likely other Newmar DP's) has one or two cable driven latches. When you pull the outside latch a cable pulls on the over center latch to open the door. This cable is attached via a fitting retained by a single Allen screw. If those Allen screws are not tight eventually the cable will pull out of the fitting making it impossible to open a basement door without some very difficult surgery explained by Skywatcher1 in the post noted.
I have had no latch failures (yet) but yesterday I took every basement door apart for an inspection. 80% of my Allen screws were loose. Four of these doors had cables just about to pull out of the fittings. Many of these cables had excessive play. In other words the cable was not tight between attachments. You can easily test for slack cables (which may mean they are pulling through the fitting because of a loose Allen screw). Simply pull on the latch. If the latch does not release as you first move the latch the cable has slack. I also found several stripped self tapping screws holding latches. The latches were actually moving on the door when closed.
As I moved around the coach repairing all the latches I thought about all the problems I would encounter on the road if one of those doors would not open. For instance, the DEF tank is behind one of those latches. There would be no way to fill the tank if the latch failed.
It takes a couple of hours to inspect and fix all the latches.