Sounds like a multilevel Repair Shop Order might be what you are looking for.
This requires that the part you want to repair (rework) has been already manufactured in IFS with a shop order so that an As-Built record exists for it (As-Built Structure page).
It also requires that oyu have a buildable repair product structure (BOM) for the part.
If above is set you can create a shop order of type Repair and select the Multilevel Repair option.
Then manually reserve or issue the correct serial number you want to repair/rework. this will enable the Multilevel Repair Structure tab (a separate page in Aurena client). From this structure you can select the components to remove/disassemble and do add/assembly in the correct position in the structure.
Removed/disassembled components are then received to stock as Salvage Parts and new components to be added/assembled are added in the Materials tab.
When the repair/reworked product is received back to stock a new version of the As-Built record will be saved.