TM9-4310-396-13d. Maintenance Levels (Column 4). Column 4 specifies, by the listing of a work time figure in the appropriatesubcolumn(s), the category of maintenance authorized to perform the function listed in column 3. This figure representsthe active time required to perform that maintenance function at the indicated category of maintenance. If the number orcomplexity of the tasks within the listed maintenance function vary at different maintenance categories, appropriate worktime figures will be shown for each category. The work time figure represents the average time required to restore anitem (assembly, subassembly, component, module, end item, or system) to a serviceable condition under typical fieldoperating conditions. This time includes preparation time (including any necessary disassembly/assembly time),troubleshooting/fault location time, and quality assurance/quality control time in addition to the time required to performthe specific task identified for the maintenance functions authorized in the maintenance allocation chart. The symboldesignations for the various maintenance categories are as follows:C..........Crew or OperatorO..........Unit MaintenanceF..........Direct Support MaintenanceH..........General Support MaintenanceD..........Depot Maintenancee. Tools and Equipment Reference Code (Column 5). Column 5 specifies, by code, those common tool sets(not individual tools ),common TMDE, and special tools, special TMDE, and special support equipment required toperform the designated function.f.Remarks Code (Column 6). When applicable this column contains a letter code, in alphabetical order, which iskeyed to the remarks contained in Section IV.B-4. Explanation of Columns in Tools and Test Equipment Requirements, Section III.a. Column 1, Tools and Test Equipment Reference Code . The tool and test equipment reference codecorrelates with a code used in the MAC, Section II, Column 5.b. Column 2, Maintenance Level. The lowest level of maintenance authorized to use the tool or test equipment.c. Column 3, Nomenclature. Name or identification of the tool or test equipment.d. Column 4, National Stock Number . The National stock number of the tool or test equipment.e. Column 5, Tool Number . The manufacturer's part number.B-5. Explanation of Columns in Remarks, Section IV.a. Column 1, Remarks Code. The code recorded in Column 6, Section II.b. Column 2, Remark. This column lists information pertinent to the maintenance function being performed asindicated in the MAC, Section II.B-3
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