PS: even if you have to redo the drawing, the easiest way is to open the part in the assembly as I have already advised you and to do your pure part drawing
if you want to change a single part in an assembly mep knowing that the mep corresponds to 3D you must imperatively go through 3D
By using SW Explorer, it works, you can replace an assembly with a part. Well then, when opening the mep, as these are not the imported dimensions, they are no longer associated with the part (I'm unlucky today). So it comes down to redoing it or almost (we keep the views) ... But it still works.
@bart: I don't really see your solution. On the mep, the other components (of this temporary assembly) are already hidden. But the temporary assembly must disappear because it is never referenced in the systems (except this mep).
@Bart. Your solution works very well ... in the case of a mechanically welded. Your set is made in one piece. And you have to choose a particular piece in it. (you have a .prt file in short)
But here, in the case of an .asdm I deeply doubt :D