Downloaded from https://www.everyspec.com MIL-STD-3001-4(AS) 5.3.11.1.8 Detailed IPB technical content requirements. General guidelines for IPB GAPL and illustration development are provided in 5.3.11 through 5.3.11.1.7. Additional detailed technical content requirements for GAPL and illustration development are contained in 5.3.11.1.8.1 through 5.3.11.1.8.9. 5.3.11.1.8.1 Nuclear hardness critical items (HCI), (CSI) or (OCI). When survivability considerations are specified and Hardness Critical Items (HCI) are identified on drawings and parts lists, the items must be marked and identified in the "DESCRIPTION" entry of the Group Assembly Parts Lists (GAPL).
All changes to or proposed substitutions of HCIs must be evaluated for hardness impacts by the engineering activity responsible for survivability. The Introduction (refer to MIL-STD-3001-1, Appendix B) will include an explanation of the (HCI) symbol's usage and method of highlighting and other pertinent information as necessary to emphasize uniqueness of HCIs. 5.3.11.1.8.2 Electrostatic discharge (ESD) sensitive parts. If electronic equipment to be handled, inspected, repaired or assembled is ESD sensitive, the items must be marked and identified in the "DESCRIPTION" entry of the GAPL.
The Introduction (refer to MIL-STD-3001-1, Appendix B) will include an explanation of the (ESD) symbol's usage and method of highlighting and other pertinent information as necessary to emphasize uniqueness of ESD sensitive components. 5.3.11.1.8.3 Index numbers on illustrations. Index numbers, with leader lines to the parts to which they pertain, shall be used on all IPB illustrations. Index numbers are assigned in accordance with 5.3.11.1.1. The index numbers on each illustration shall agree with those in the GAPL.
Additional nomenclature may be added to these illustrations in order to properly identify parts not listed and indexed in the GAPL in order to properly indicate the relationship of parts to assemblies and to better present the maintenance procedures. 5.3.11.1.8.4 Attaching parts on illustrations. Each part in a set of attaching parts (such as bolt, washer, nut) shall be assigned an index number. Sets of attaching parts shall be exploded when the assembly is hidden and sufficiently complex to merit explosion. The total quantity of each item listed in the GAPL shall be identified with index numbers in the illustration.
To avoid cluttering an illustration with unnecessary index numbers, large quantity items need not be indexed more than once on the illustration or on each sheet of a multisheet illustration on which the part is shown. However, the location of the items must be obvious in the illustration. For example, multiple size rivets that are shown in various locations on the illustration need only be indexed once for each part number listed in the GAPL. 5.3.11.1.8.5 Indexing assemblies. Each assembly and subassembly of the end item shall be shown assembled and assigned an index number.
Assemblies and subassemblies coded for assembly, manufacture, or repair at the applicable maintenance level shall also be shown exploded in a detail view on the main illustration or in a separate illustration, and index numbers shall be assigned to all detailed parts. 5.3.11.1.8.6 Items not having a logical maintenance sequence. For items not having a logical maintenance sequence (e.g., circuit card assembly), begin assigning index numbers at the top left-hand corner and continue clockwise. 5.3.11.1.8.7 Component boards.
When a component board or bracket assembly that holds electrical components is presented orthographically, the reference designation may be placed within the view of the part, if space permits. Leader lines may be used to identify reference designations that cannot be placed within the view of the part. When the number of leader lines to indexed parts causes the illustration to become cluttered, the figure may contain a legend adjacent to the artwork or on a separate sheet. The listing shall contain an alphanumerical listing of the reference designations and their associated index numbers. Index numbers for items with reference designations shall be identified using the legend and 28