The NALCOMIS activities use conversation code N618 to record the return of consumable or repairable items from customers. This process creates a turn-in (D6A) record. It also generates a DD Form 1348-1 or Repairable Movement Notice (D6A) if the item is repairable. NOTE: In the event that wrong material was received from off station, either RFI or non-RFI, and there is no allowance for the material, submit a Report Of Discrepancy (ROD) for disposition instructions. The RCU prepares a duplicate DD Form 1348(6 pt) (or other document) of the original requisition with RECTYP 62. The RECTYP 62 will delete the RECTYP 60 previously submitted. The RCU forwards one copy of the DD Form 1348 to the data services facility (DSF) for processing. A duplicate DD Form 1348 is not required if the original copy can be located and destroyed prior to being forwarded to DSF. In NALCOMIS activities, RCU is primarily involved with conversation codes N601, N602, N604, N607, N610, and N615. The RCU also uses conversation codes N606, N614, N619, N624, N630, N643, N668, and N679. Refer to the NALCOMIS User's Manual for other conversation codes used by RCU. TECHNICAL RESEARCH UNIT (TRU).— The TRU is responsible for the verification of requisition data, such as part number, stock number, references, and other technical data. When applicable, a thorough technical research is made for substitution, interchangeability, and alternate national item identification numbers. The TRU processes requisitions as follows: The TRU receives requisitions from RCU. Upon receipt of the requisitions, TRU performs technical research to find the required data needed to process the requisition. The TRU uses publications, catalogs, stock lists, manuals, or computers to perform the research. If the requisition is for a consumable item, TRU sends the green copy of DD Form 1348 to RCU and discards the yellow and white copies. The TRU sends the remaining copies of DD Form 1348 to the stock locator unit for further processing. If the requisition is for a repairable item, TRU checks the CRIPL. If the requested item is not listed in the CRIPL, TRU marks the requisition as a mandatory turn-in repairable (MTR). The TRU also lists the applicable substitute, interchangeable, supersedure, and next higher assembly information on the requisition. The TRU forwards the white copy of the DD Form 1348 to DCU and the remaining copies to the stock locator unit (SLU). In NALCOMIS activities, TRU uses conversation codes N604, N610, N631, N650, N651, N654, N656, N657, and N679. It also uses conversation codes N682, N683, N687, N689, and N628. STOCK LOCATOR UNIT (SLU).— The SLU is responsible for locating the material by use of stock locator cards, master stock status and locator listing (MSSLL), or other available locator systems. Under some automated systems, the locations are printed on the requisitions when processed. SLU processes the requisition as follows: Upon receipt of a requisition from TRU, SLU determines the availability and location of the requested material. The SLU will put the location of material carried in stock on a DD Form 1348 and send it to MDU. If the requested item is NC/NIS, SLU will put the status on the DD Form 1348 and forward the requisition to TRU for a recheck. The SLU conducts a physical warehouse/storeroom check on all NMCS/PMCS/work stoppage requisitions that were NC or NIS. When SLU receives the requisition rechecked by TRU, for a consumable item, and the status is still NC/NIS, SLU will forward the requisition to RCU. If the NC/NIS requisition is for a repairable item, SLU sends the green copy of the DD Form 1348 to RCU. The SLU will hold the remaining copies of the DD Form 1348 in the repairable suspense file until notified by RCU to induct the item as EXREP or work stoppage. Upon notification by RCU to induct the item, SLU marks the requisition EXREP or work stoppage and forwards the DD Form 1348 to MDU for component pickup. The SLU forwards the requisitions for repairable items, listed in the CRIPL, that are NC/NIS to RCU. In activities that use the preposting method, the SLU function is not required. In this case, the stock control or storage branch assumes this task. In NALCOMIS activities, SLU primarily uses conversation codes N610, N616, N628, N629, N631, N662, N670, N687, and N809. The SLU uses supporting conversation codes N606, N607, N619, N624, N632, N633, N634, N638, N639, N686, and N689. Refer to the NALCOMIS User’s Manual for other conversation codes used by SLU. MATERIAL DELIVERY UNIT (MDU).— The MDU is responsible for the pickup and delivery of all 9-7