Material to be sent for servicing !!

HI

Our client went live about 8 months ago. They continously use spare parts for their machinery. These parts are consumable items. Non stockable.

Now they want to send these parts for servicing.

How to map this scenario in SAP?? How to take the parts into stock and send to vendor for servicing? How to reissue these serviced parts for consumption? These parts could be 2-3 yrs old as well and were issued before SAP came into picture.

Thank You