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Author's profile photo Ramani Thinakaran

Core return on exchange process

Exchange process is common in Aerospace companies. In this case an airline operator can contact an assembly (also referred to ss LRU) manufacturer (“OEM”) and ask for a part to be sent them first typically with a fee and or core deposit. In this case an aircraft will not have a “hole”.

The part is received at operator and then the defective LRU is replaced and no hole exists in aircraft.

The defective unit “core” belongs to OEM. It should be returned to OEM. There are many ways to return it in SAP.


Use non-referenced delivery – typically a core label is attached.

Create core return PO

Create a repair order RO


RO is confusing when it comes to OEM. This will like the operator is sending own part for repair. In OEM side an tnternal WO and sales order are created. Part will be in repair. Meanwhile CAM will figure out this is his (OEM) hart. Now you need delete all SAP objects – notification, sales order and work order and create an internal notification and WO.

I noticed only 5% of customer documentation specifies the old and new serial number. The easiest eay is to write this on item text in SAP systems.

I noticed from one system the two serial numbers were populated already. I found out that it came from an IBM mainframe maintenance package called SCEPTRE. This closely resembles James Bond villain SPECTRE. This system populates TSN, TSO, CSN, CSO also.


Even worse is a paperwork from US Govt SAP project which spent $1 billion budget, does not produce a core return paperwork.

This is just showing the integration of processes and why printing correct paperwork in SAP or Legacy is important.

I this case from operator a PO is created. This documet is used by OEM to trigger MRO process. If the correct information is not provided, it causes confusion and rework on OEM side.


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      Author's profile photo jessica berman
      jessica berman

      It helped me so much for my project, would love to update more concept,

      Thanks mythDHR

      Author's profile photo Adarsh kumar
      Adarsh kumar

      Thanks for this amazing post. I really enjoyed it. MythDHR

      Author's profile photo Costa vida
      Costa vida

      Thanks for sharing this information.