We have a common situation where we receive in Aviation Components for Repair that we send out for subcontract repair via a CRO Repair of type External Service Order, Order Type 6 (ESO) Purchase Order, component “Customer Owned”

In some instances the component is returned back from the Repairer with a different Part Number due to the incorporation of a Service Bulletin or Modifcation (serial number is the same).

On return the component is receipted into Inventory with the “new” Part Number,  as that is the Part Number on the Repairers Release Certificate.

Issue arises that the Customer Order (Line 1) that is associated with the CRO Repair Line is for the Part Number that we received in from the Customer therfore we are unable to Reserve the newly modified item against that line. 

We can manually add a line to the Customer Order for the new Part Number, reserve and ship and then cancel the existing Line 1 on the Customer Order but this then disconnects the CRO Repair line from the Customer Order.

Any suggestions of another way of doing this that keeps the connection from the CRO Repair to the Customer Order.