Creo ModelCHECK > checks > T19_NORMAL_ORIENT (Orientation of Similar Normals)
  
T19_NORMAL_ORIENT (Orientation of Similar Normals)
Y/N/E/W
GeomIntegrityCHECK checks whether all the normals of neighboring faces in a group have the same orientation. It reports the faces with normals whose orientation differs from the orientation of the majority of normals in the same face.
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N