ANSA Airbus geometry cleanup (TOPO) part 1

CAD file :grabcad.com/li...
The total A380 outer skin is going to be extracted to run an external aerodynamic analysis to find out aerodynamic forces lift, drag and side force. The CAD model needs to be cleaned in such a way that ANSA mesh algorithms will work.
Geometry clean up or CAD cleanup or Topo work
The geometry should be either closed or opened with proper edges as per requirement of the physics which is going to be solved.