Manufacturing decomission process

Hi,

I have doubts about how to handle the decommissioning of manufactured products(FG) in Discrete Manufacturing

Example: I'm a manufacturer of Miltant Transmission(FG) for the Army vehicle

Based on the requirement we manufactured 1090 Finished Products In a month supplying 1000 FG to the government, Now the government has decided to stop using the product and they sent a letter to call off producing the transmission and not sell to any militant service, now we need to reverse engineer process, to separate the raw material and SFG from the FG and keep the material to the corresponded sub-inventory, in R12 we have WIP return concept, in fusion how to achieve this scenario and what is the type of work order, is that possible to use same BOM?