TM 5-4320-301-13&PTM 08936A-13&P/li.Repair. The application of maintenance services1 including fault location/troubleshooting2,removal/installation, and disassembly/assembly3 procedures, and maintenance actions4 to identifytroubles and restore serviceability to an item by correcting specific damage, fault, malfunction, or failurein a part, subassembly, module (component or assembly), and item, or system.j. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a com-pletely serviceable/operational condition as required by maintenance standards in appropriate technicalpublications (i.e., DMWR). Overhaul in normally the highest degree of maintenance performed by theArmy. Overhaul does not normally return an item to like new condition.k. Rebuild. Consists of those service/actions necessary for the restoration of unserviceableequipment to a 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 Armyequipment and 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 ofwhich is to identify maintenance significant components, assemblies, subassemblies, and modules withthe next higher assembly.b. Column 2- Component/Assembly. Column 2 contains the names of components, assem-blies, 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.)1Service - Inspect, test, service, adjust, aline, calibrate, and/or replace2Fault Iocation/troubleshooting - The process of investigating and detecting the cause of equipmentmalfunctioning; the act of isolating a fault within a system or unit under test (UUT).3Disassembly/assembly - The step-by-step breakdown (taking apartt) of a spare/functional groupcoded item to the level of its least component, that is assigned as SMR code for the level of maintenanceunder consideration (i.e., identification as maintenance significant).4Actions - Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.B-2
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