XR12 Troubleshooting Manual Parts ListsPage 3-2 Issue 3.0 2009-07-28Reference designation listsIndividual reference designation lists are provided for:• assemblies that are assigned an alpha-prefixed Nautel nomenclature (e.g., NAPC147D)• cable harnesses that are assigned a numbered Nautel part (e.g., 202-8005-01)• optional kits that are assigned a numbered Nautel part.To obtain the full reference designation for a specific part the Nautel configuration control numbermust be located in the family tree (see Figure 3.1 on page 3-6) to include the reference designation ofall higher level assemblies. The reference designation lists, which are titled and presented inalphanumeric order, are divided into columns to aid in locating specific information.Column contentThe following paragraphs provide an explanation of the purpose and contents of each column in thepart number indexes.Ref des columnThe 'ref des' column contains the reference designation for a specific part. These designations areassigned in accordance with the requirements of American National Standard Specification ANSIY32.16.Description columnThis column contains the name and descriptive information for each part. The key word is presentedfirst, followed by the adjective identifiers. When the description is See Family Tree for AssemblyNomenclature, the associated part is subject to its own part index table or is contained in an optionalkit's list. Look up the reference designation list title (nomenclature) and the reference designation ofthe associated part in the family tree (Figure 3.1 on page 3-6) to determine where to locate its partinformation.Nautel # columnThis column contains the Nautel number assigned to each part. This number is Nautel's drawingnumber for Nautel manufactured parts, Nautel's configuration control number for assemblies that areunder configuration control management, or Nautel's inventory management number for purchasedparts. When a Nautel configuration control number (e.g. NAPC*) is referenced in this column, theassociated ref des item is subject to its own part index table.