number (PN), national item identification number (NIIN), nomenclature, avionics system name, avionics system number, and line item number. The line item number cross-reference is optional, provided only when specifically requested by the user. The cross-references provide a rapid means of identifying and locating the position of an item in the body section. They are the key to proper use of the IMRL. An example of a part number cross-reference listing is shown in figure 3-10. IMRL main body. This section lists all items allowed for the activity, and shows the authorized allowance quantity for each item allowed. Each subsection of the IMRL lists applicable nonavionic, government furnished, aircraft equipment (GFAE) following the last line item number listed in that subsection. Each page in the IMRL main body (fig. 3-11) presents identification data, description data, and land vessel (LV) code, maintenance level data, accountability data, and allowance data. Depending on the type of activity to which the IMRL applies, the main body may be have one or more subsections (or support categories of equipment). Each subsection (or support category) may have two parts, depending on single model application or multimodel applications. Part I contains items that apply to a specific model in an activity’s IMRL. Part II contains items that apply to more than one model in an activity’s IMRL. The facility subsection contains only part II and defines all applicable work centers. The page heading format for the IMRL main body (fig. 3-11) is presented both vertically and horizontally. The IMRL legend lists page headings. Each IMRL main body page starts with preparation date, report title, file name, page number, subsection, model, AAI, activity name, and activity reportable code. For multiple applications, “multi” appears as the model. The column headings identify the type of information contained in each column. These headings and the data element contents of each column are defined in NAVAIRINST 13650.1. IMRL Activity Inventory Record. This record lists all items that are on inventory at the applicable activity on the date this section is prepared. It is reissued in its entirety each month. It provides identification data, management data, inventory status, authorized allowances, and nomenclature for each item (fig. 3-12). Current procedures provide for IMRL “tailoring,” since SERMIS source data does not necessarily reflect peculiarities such as geographic factors or certain operating conditions. Upon receipt of a new IMRL, each activity will review the allowances for accuracy and adequacy for its support requirements. A primary function of tailoring is to eliminate or reduce common or general-type SE quantities by supporting a mix of weapons systems or components. Tailoring also serves to uncover errors in the IMRL that affect not only the particular aircraft mix supported, but also may affect the support of aircraft and systems at other similar activities. The two methods of tailoring an IMRL are IMRL activity tailoring and the SECA tailoring conference. IMRL activity tailoring. All maintenance activities are responsible for submitting IMRL revision requests (fig. 3-13) as a post-review of tailoring actions. Maintenance activities submit IMRL revision requests following the procedures outlined in NAVAIRINST 13650.1. SECA tailoring conference. The SECA representative makes on-line tailoring actions as a result of a SECA-held tailoring conference. Q19. What are the major sections of the IMRL? Q20. What section of the IMRL lists all of the items allowed for the activity along with allowance quantities? Q21. How often is the IMRL Activity Inventory Record reissued? MATERIAL REQUIREMENTS LEARNING OBJECTIVE: Define the purpose of the Material Control work centers and the jobs performed by the personnel assigned. Whenever a need arises to do a job, the tools, supplies, and equipment that are needed generate material requirements. The supply department fills these requirements. The material control center (MCC) at the organizational and intermediate levels (O and I levels) of maintenance is the point of contact for material needed by maintenance personnel. 3-17