TM 9-6115-658-13&P C-8 C-5  SPECIAL INFORMATION. UOC.  The UOC appears in the lower left corner of the Description Column heading.  Usable on codes are shown as "UOC: …" in the Description Column (justified left) on the first line under the applicable item/nomenclature.   Uncoded items are applicable to all models.  Identification of the UOCs used in the RPSTL are: Code    Used On YBX      AN/MJQ-42 YBY      AN/MJQ-43 1.  Fabrication Instructions.  Bulk materials required to manufacture items are listed in the bulk material functional group of this RPSTL.  Part numbers for bulk materials are also referenced in the Description column of the line item entry for the item to be manufactured/fabricated.  Detailed fabrication instructions for items source coded to be manufactured or fabricated are found in Appendix F. 2.  Index Numbers.  Items which have the word BULK in the figure column will have an index number shown in the item number column.  This index number is a cross-reference between the NSN / P/N index and the bulk material list in the repair parts list. C-6  HOW TO LOCATE REPAIR PARTS. 1.  When NSNs or P/Ns Are Not Known. First.  Using the table of contents, determine the assembly group to which the item belongs.  This is necessary since figures are prepared for assembly groups and subassembly groups, and lists are divided into the same groups. Second. Find the figure covering the functional group or subfunctional group to which the item belongs. Third.  Identify the item on the figure and note the number(s). Fourth.  Look in the repair parts list for the figure and item numbers.  The NSNs and part numbers are on the same line as the associated item numbers. 2.  When NSN is Known. First.  If you have the NSN, look in the STOCK NUMBER column of the NSN index.  The NSN is arranged in NIIN sequence.  Note the figure and item number next to the NSN. Second.  Turn to the figure and locate the item number.  Verify that the item is the one you are looking for. 3.  When P/N is Known. First.  If you have the P/N and not the NSN, look in the PART NUMBER column of the P/N index.  Identify the figure and item number. Second.  Look up the item on the figure in the applicable repair parts list. C-7  ABBREVIATIONS. Abbreviation   Explanation Refer to glossary at the back of this manual.