TM 10-3930-675-20-20201 00-2MAINTENANCE ALLOCATION CHART (MAC) INTRODUCTION - CONTINUED0201 00MAINTENANCE FUNCTIONS - CONTINUEDNOTEThe following definitions are applicable to the “repair” maintenance function:•Services - Inspect, test, service, adjust, align, calibrate, and/or replace.•Fault location/troubleshooting - The process of investigating and detecting the cause of equipment mal-functioning; the act of isolating a fault within a system or Unit Under Test (UUT).•Disassembly/assembly - The step-by-step breakdown (taking apart) of a spare/functional group codeditem and to the level of its least component, that is assigned an SMR code for the level of maintenanceunder consideration (i.e., identified as maintenance significant).•Actions - Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.10.Overhaul.That maintenance effort (service/action) prescribed to restore an item to a completely serviceable/operationalcondition as required by maintenance standards in appropriate technical publications. Overhaul is normally the highestdegree of maintenance performed by the Army. Overhaul does not normally return an item to like new condition.11.Rebuild.Consists of those services/actions necessary for the restoration of unserviceable equipment to a like new con-dition in accordance with original manufacturing standards. Rebuild is the highest degree of materiel maintenanceapplied to Army equipment. The rebuild operation includes the act of returning to zero those age measurements (hours/miles, etc.) considered in classifying Army equipment/components.EXPLANATION OF COLUMNS IN THE MAC, TABLE 11.Column(1)-GroupNumber.Column (1) lists FGC numbers, the purpose of which is to identify maintenance signifi-cant components, assemblies, subassemblies, and modules with the Next Higher Assembly (NHA).2.Column(2)-Component/Assembly.Column (2) contains the item names of components, assemblies, subassemblies,and modules for which maintenance is authorized.3.Column(3)-MaintenanceFunction.Column (3) lists the functions to be performed on the item listed in Column (2).(For a detailed explanation of these functions refer to “Maintenance Functions” outlined above).4.Column(4)-MaintenanceLevel.Column (4) specifies each level of maintenance authorized to perform each functionlisted in column (3), by indicating work time required (expressed as manhours in whole hours or decimals) in the appro-priate 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 varies 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) toa serviceable condition under typical field operating conditions. This time includes preparation time (including any nec-essary disassembly/assembly time), troubleshooting/fault location time, and quality assurance time in addition to thetime required to perform the specific tasks identified for the maintenance functions authorized in the MAC. The symboldesignations for the various maintenance levels are as follows:C . . . . . Operator or Crew MaintenanceO . . . . . Organizational MaintenanceF. . . . . . Direct Support MaintenanceL . . . . . Specialized Repair Activity (SRA)H . . . . . General Support MaintenanceD . . . . . Depot Maintenance
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