TM 1-2835-209-23P 5. Special Information.  Use the following subparagraphs as applicable: a. USABLE ON CODE.  The usable on code appears in the lower left comer of the Description column heading. Usable on codes are shown as "UOC:. . . . . . . . " in the Description column justified left) on the first line applicable item description/nomenclature.  Uncoded items are applicable to all models.  Identification of the usable on codes used in the RPSTL are: Code Used On PAA 3800480-1 PAB 3800480-2 b. 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 codes to be manufactured or fabricated are found in TM 55-2835-209-23. c. ASSEMBLY INSTRUCTION.  Items that make up the assembly are listed immediately following the assembly item entry or reference is made to an applicable figure. d. KITS.  Line item entries for repair parts kits appear at the end of the applicable figure. e. INDEX NUMBERS.  Items which have the word BULK in the figure column will have an index number computer generated, shown in the item number column.  This index number is a cross-reference between the National Stock Number/Part Number Index and the bulk material list in Section II. f. ASSOCIATED PUBLICATIONS.  The publication(s) listed below pertain to Gas Turbine Engine Assembly and its components: Publication Short Title DMWR 55-1560-309 Electronic Sequence Unit TM 55-2835-209-23 Gas Turbine Engine g. This manual does not list spare and repair parts required for maintaining shipping and storage containers for 3800480-1 Gas Turbine Engine (APU).  Refer to TB 55-8100-200-24, Maintenance of Specialized Reusable Containers for Aircraft Equipment, for requisitioning spare and repair parts. 6. How to Locate Repair Parts. a. When National Stock Number or Part Number is Not Known. (1)    First.  Using the table of contents, determine the functional group to which the item belongs.  This is necessary since figures are prepared for functional groups and listings are divided into the same groups. 8