I haven't created an FMEA from Mendix but I have displayed one and allowed it to be edited. You can use the basic capabilities of the Teamcenter Connecter and Extension, but you need to understand the Teamcenter data model. The FMEA data model is unusual in that it is not a product structure of item revision types as you might expect, but is instead simple objects connected through custom relations. Here is the domain model I used before, which may help to get you started: