In the New dialog, on the tabbed page Model, under Templates, select a simple template (in this example "Model").
If the part is correctly placed but not visible in the 3D view, open the Layer Settings via Ctrl+L and enable Layer 27. (Assemblies are placed on Layer 27 and this is not visible by default.)
Check whether the document is saved in Teamcenter[55] and whether it is added in PLMTABLE2.
Open PLMTABLE2 in PARTlinkmanager via Extras menu -> Database -> Edit additional tables.