there are some useless edges, which just increase pcount without adding anything to the geometry.
Also, the model isn't stable and some faces will not be rendered in the vanilla FS2.
I see there also are many interscetion.
You know that they'll work only with FSO, and not vanilla FS2, ya? Also, when an object is connected to another with some edges, but they intersect each other with some other edges there could be problems.
Moreover, when 2 edges share the same position (so that you see only one edge when they are

2 or more) there could be problems, unless you triangulize.
I'm referring to the nose: the diagonal top object intersect the main hull but seem connected in the front: If it is connected you'll probably have problems, if it isn't connected then you have overlapping edges and you may have problems if you don't triangulize that area.