TM 5-4320-302-14i.Repair.The application of maintenance services' or other maintenance actions2 to restoreserviceability to an item by correcting specific damage, fault, malfunction, or failure in a part, sub-assembly, module (component or assembly), end item, or system.j.Overhaul. That maintenance effort (service/action) necessary to restore an item to a completelyserviceable/operational condition as prescribed by maintenance standards in appropriate technical pub-lications (i.e., DMWR). Overhaul is normally the highest degree of maintenance performed by the Army.Overhaul does not normally return an item to like new condition.k.Rebuild. Consists of those services/actions necessary for the restoration of unserviceable equipment toa like new condition in accordance with original manufacturing standards. Rebuild is thehighest degree of material maintenance applied to Army equipment. The rebuild operation includes theact of returning to zero those age measurements (hours/miles, etc.) considered in classifying Armyequipments/components.B-3.EXPLANATION OF COLUMNS IN THE MAC, SECTION IIa.Column (1) - Group Number.Column 1 lists functional group code numbers, the purpose ofwhich is to identify components, assemblies, subassemblies, and modules with the next higher assembly.b.Column (2) - Component/Assembly. Column 2 contains the names of components, -assemblies,subassemblies, and modules for which maintenance is authorized.c.Column (3) - Maintenance Function. Column 3 lists the functions to be performed on the itemlisted in Column 2. (For detailed explanation of these functions, see paragraph B-2.)d.Column (4) - Maintenance Category. Column 4 specifies, by the listing of a work time figure inthe appropriate subcolumn(s), the category of maintenance authorized to perform the function listed inColumn 3. This figure represents the active time required to perform that maintenance function at theindicated category of maintenance. If the number or complexity of the tasks within the listed maintenancefunction vary at different maintenance categories, appropriate work time figures will be shown foreach category. The work time figure represents the average time required to restore an item (assembly,subassembly, component, module, end item, or system) to a serviceable condition under typical fieldoperating conditions. This time includes preparation time, troubleshooting time, and quality assurance/quality control time in addition to the time required to perform the specific tasks identified for themaintenance functions authorized in the maintenance allocation chart. The symbol designations for thevarious maintenance categories are as follows:C........................................................................Operator or crew.O........................................................................Organizational maintenance.F ........................................................................Direct support maintenance.H........................................................................General support maintenance.D........................................................................Depot maintenance.e.Column (5) - Tools and Equipment.Column 5 specifies, by code, those common tool sets (notindividual tools) and special tools, TMDE, and support equipment required to perform the designatedfunction.f.Column (6) - Remarks.This column shall, when applicable, contain a letter code, in alphabeticalorder, which shall be keyed to the remarks contained in Section IV.1Services - inspect, test, service, adjust, aline, calibrate, or replace.2 Actions - welding, grinding, riveting, straightening, facing, remachining, or resurfacing.B-2
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