TM 10-8340-227-13&PB-2 Maintenance Functions - Continuedj. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completelyserviceable/operational condition as required by maintenance standards in appropriate in appropriate technicalpublications (i.e., DMWR). Overhaul is normally the highest degree of maintenance performed by the Army. Overhauldoes not normally return an item to like new condition.k. Rebuild. Consists of those service/actions necessary for the restoration of unserviceable equipment to a likenew condition in accordance with original manufacturing standards. Rebuild is the highest degree of materielmaintenance applied to Army equipment. The rebuild operation includes the act of returning to zero those agemeasurements (e.g. hours, miles) considered in classifying Army equipments/components.B-3. Explanation of Columns in the MAC, Section II.a. Column 1, Group Number. Column 1 lists functional group code numbers, the purpose of which is to identifymaintenance significant components, assemblies, subassemblies, and modules with the next higher assembly.b. Column 2, Component/Assembly. Column 2 contains the item names of components, assemblies,subassemblies, and modules for which maintenance is authorized.c. Column 3, Maintenance Functions. Column 3 lists the functions to be performed on the item listed in Column 2.(For detailed explanation of these functions, see paragraph B-2.)d. Column 4, Maintenance Level. 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 function atthe indicated level of maintenance. If the number or complexity of the tasks within the listed maintenance function varyat different maintenance levels, appropriate work-time figures will 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 time in addition tothe time required to perform the specific tasks identified for the maintenance functions authorized in the maintenanceallocation chart. The symbol designations for the various maintenance levels are as follows:C.................. Operator or crew maintenanceO.................. Unit maintenanceF.................. Direct support maintenanceB-3
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