How to handle cancelled CO in MRO external repair service process?

@Kerry Sitler I didn't receive any responses, but I was able to resolve it in below manner after trying out many workarounds.

The issue is to get back the inventory part to your inventory as well as handle the service cost. So, just try below steps and let me know, if this suits you.

Let's assume the shipped out Part is ‘A’

1. Create a new PO with order code 01 but similar to previous order code 06 PO. This PO has no link with CAMRO structure.
2. Add the part (A) details, make sure you have set the ownership and condition code similar to the originally shipped out part (A) which you are expecting to receive. If there will be a change in condition code after repair by vendor, put the new condition code in the new PO line.
3. Now verify the 'Current Status' is 'Issued' for that part (A) in 'Part Serial' window.
4. For the Part A, verify whether the check box is un-ticked for 'Stop PO Arrivals of Issued Serials' under 'Part' window.
5. Now, if you want to track it, you can peg the new PO to relevant Assembly shop order material demand, using ‘Manual Pegging’ (You have to do this, before receive the new PO)
6. Now release new PO and receive the same serial number. Your part A will be in inventory.

Now the question raises as what should I do with the originally created PO? Yes... unfortunately, you cannot cancel it either. You can disconnect it from CAMRO structure (if all business parties agreed).

Now, if you ask, what can I do for the service cost here? You have few options,

1. Try to include the service cost with another order code 6 PO with same supplier under same WO - If it is possible only with business process (Just to handle this situation).
2. Manually add cost line for this service cost in Complex Assembly WO. 

In future, you can handle this situation by creating a custom event which prevents users to cancel CO lines which are connected with order code 06 PO.

Good Luck, and let me know if this works for you.