TM 9--2350--292--20--20714 00--2INTRODUCTION FOR MAINTENANCE ALLOCATION CHART -- CONTINUED0714 00MAINTENANCE FUNCTIONS -- CONTINUEDi. Repair. The application of maintenance services1 including fault location/troubleshooting2, removal/installation,and disassembly/assembly3 procedures, and maintenance actions4 to identify troubles and restore serviceability to anitem by correcting specific damage, fault, malfunction, or failure in a part, subassembly, module (component or as-sembly), end item, or system.j. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely serviceable/operational condition as required by maintenance standards in appropriate technical publications (i.e., DMWR). Over-haul is normally the highest degree of maintenance performed by the Army. Overhaul does not normally return anitem to like--new condition.k. Rebuild. Consists of those services/actions necessary for the restoration of unserviceable equipment to alike--new 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 age mea-surements (e.g., hours/miles) considered in classifying Army equipment/components.EXPLANATION OF COLUMNS IN THE MAC, TABLE 1 (WP 0715 00)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 next higher assembly.b. Column 2, Component/Assembly. Column 2 contains the item names of components, assemblies, subas-semblies, and modules for which maintenance is authorized.c. Column 3, Maintenance Function. Column 3 lists the functions to be performed on the item listed in Column2. (For detailed explanation of these functions, see Maintenance Functions.)1Services -- Inspect, test, service, adjust, align, calibrate, and/or replace.2Fault location/troubleshooting -- The process of investigating and detecting the cause of equipment malfunction-ing; the act of isolating a fault within a system or unit under test (UUT).3Disassembly/assembly -- The step--by step breakdown (taking apart) of a spare/functional group coded item tothe level of its least component that is assigned an SMR code for the level of maintenance under consideration (i.e.,identified as maintenance significant).4Actions -- Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.d. Column 4, Maintenance Level. Column 4 specifies each level of maintenance authorized to perform each functionlisted in Column 3, by indicating work time required (expressed as man--hours in whole hours or decimals) in the appropri-ate subcolumn. This work--time figure represents the active time required to perform that maintenance function at theindicated level of maintenance. If the number or complexity of the tasks within the listed maintenance function vary atdifferent maintenance levels, appropriate work--time figures are to be shown for each level. The work--time figure repre-sents the average time required to restore an item (assembly, subassembly, component, module, end item or system) to aserviceable condition under typical field operating conditions. This time includes preparation time (including any neces-sary disassembly/assembly time), troubleshooting/fault location time, and quality assurance time in addition to the timerequired to perform the specific tasks identified for the maintenance functions authorized in the maintenance allocationchart. The symbol designations for the various maintenance levels are as follows:C Operator or crew maintenance. . . . . . . . . .O Unit maintenance. . . . . . . . . .F Direct support maintenance. . . . . . . . . .L Specialized Repair Activity (SRA)5. . . . . . . . . .H General support maintenance. . . . . . . . . .D Depot maintenance. . . . . . . . . .
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