TM 9-4310-394-13d. Column4,MaintenanceLevel.Column 4 specifies each level of maintenance authorized to perform eachfunction listed in Column 3, by indicating work time required (expressed as man hours in whole hours or decimals)in theappropriate subcolumn. This work-time figure represents the active time required to perform that maintenance functionat the indicated level of maintenance. If the number or complexity of the tasks within the listed maintenance functionvary at different maintenance levels, appropriate work-time figures are to be shown for each level. The work-time figurerepresents the average time required to restore an item (assembly, subassembly, component, module, end item, orsystem) to a serviceable condition under typical field operating conditions. This time includes preparation time (includingany necessary disassembly/assembly time), troubleshooting/fault location time, and quality assurance/quality control timein addition to the time required to perform the specific tasks identified for the maintenance functions authorized in themaintenance allocation chart. The symbol designations for the various maintenance levels are as follows:C .....................Operator or crew maintenanceO .....................Unit maintenanceF .....................Direct support maintenanceL .....................Specialized Repair Activity (SRA)H .....................General support maintenanceD .....................Depot maintenancee. Column5,ToolsandTestEquipmentreferencecode.Column 5 specifies, by code, those common toolssets (not individual tools), common TMDE, and special tools, special TMDE, and support equipment required to performthe designated function. Codes are keyed to tools and test equipment in section III.f. Column6,Remarks. When applicable, this column contains a letter code, in alphabetical order, which is keyedto the remarks contained in Section IV.B-4. Explanation of Columns in Tools and Test Equipment Requirements, Section III.a. Column1,ReferenceCode.The tool and test equipment reference code correlates with a code used in theMAC, Section II, Column 5.b. Column2,MaintenanceLevel.The lowest level of maintenance authorized to use the tool or test equipment.c. Column3,Nomenclature.Name or identification of the tool or test equipment.d. Column4,NationalStockNumber. The National stock number of the tool or test equipment.e. Column5,ToolNumber. The manufacturer's part number, model number, or type number.B-5. Explanation of Columns in Remarks, Section IV.a. Column1,ReferenceCode.The code recorded in column 6, Section II.b. Column2,Remarks. This column lists information pertinent to the maintenance function being performed asindicated in the MAC, Section II.B-3
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