AVIATION SHOP EQUIPMENT CONTACT MAINTENANCE (AV SECM) SYSTEM REPAIR PARTS AND
SPECIAL TOOLS LIST (RPSTL) INTRODUCTION - (CONTINUED)
3. Reference Designator Index Work Package. Reference designators in this index are listed in ascending
alphanumeric sequence (vertical arrangement of letter and number combination which places the irst letter or
digit of each group in order "A" through "Z," followed by the numbers "0" through "9" and each following letter or
digit in like order).
REFERENCE DESIGNATOR Column. Indicates the reference designator assigned to the item.
FIG. Column. This column lists the number of the igure where the item is identiied/located in the repair parts list
or special tools list work package.
ITEM Column. The item number is the number assigned to the item as it appears in the igure referenced in the
adjacent igure number column.
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 (justiied left) on the irst line applicable item description/nomenclature.
Uncoded items are applicable to all models. Identiication of the usable on codes used in the RPSTL are:
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 references in the description column of the line
entry for the item to be manufactured/fabricated.
Index Numbers. Items which have the word BULK in the igure column will have an index number shown in
the item number column. This index number is a cross-reference between the National Stock Number/Part
Number Index work package.
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
igures are prepared for assembly groups and subassembly groups, and lists are divided into the same groups.
Second. Find the igure covering the functional group or the subfunctional group to which the item belongs.
Third. Identify the item on the igure and note the number(s).
Fourth. Look in the repair parts list work packages for the igure 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 work package. The NSN is
arranged in NIIN sequence. Note the igure and item number next to the NSN.
Second. Turn to the igure and locate the item number. Verify 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 work package.
Identify the igure and item number.
Second. Look up the item on the igure in the applicable repair parts list work package.
END OF WORK PACKAGE