TM 10-6665-297-13&Pi Repair. The application of maintenance services, including fault location/troubleshooting,2removal/installation, and disassembly/assembly procedures3 and maintenance actions, to identify troubles andrestore serviceability to an item by correcting specific damage, fault, malfunction, or failure in a part,subassembly, module (component or assembly), end item, or system.j.Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completelyserviceable/operational condition as required by maintenance standards in appropriate technical publications(i.e, DMWR). Overhaul is normally the highest degree of maintenance performed by the Army. Overhaul doesnot normally return an item to like-new condition.k.Rebuild. Consists of those services/actions necessary for the restoration of unserviceable equipmentto a like-new condition in accordance with original manufacturing standards. Rebuild is the highest degree ofmateriel maintenance applied to Army equipment. The rebuild operation includes the act of returning to zerothose age measurements (hours/miles, etc.) considered in classifying Army equipment/components.B-3.Explanation Of Columns In The MAC, Section II.a.Column1.GroupNumber. Column 1 lists functional group code numbers, the purpose of which is toidentify maintenance significant components, assemblies, subassemblies, and modules with the next higherassembly. End item group number shall be "00."b.Column2.Component/Assembly. Column 2 contains the names of components, assemblies,subassemblies, and modules for which maintenance is authorized.c.Column3.MaintenanceFunction. Column 3 lists the functions to be performed on the item listed incolumn 2. (For a detailed explanation of these functions, see paragraph B-2.)d.Column4.MaintenanceCategory. Column 4 specifies, by the listing of a work time figure in theappropriate subcolumn(s), the category of maintenance authorized to perform the function listed in column 3.This figure represents the active time required to perform that maintenance function at the indicated categoryof maintenance. If the number or complexity of the tasks within the listed maintenance function vary at differentmaintenance categories, appropriate work time figures will be shown for each category. The work time figurerepresents the average time required to restore an item (assembly, subassembly, component, module, enditem, or system) to a serviceable condition under typical field operating conditions. This time includespreparation time (including any necessary disassembly/assembly time), troubleshooting/fault location time, andquality assurance/quality control time in addition to the time required to perform the specific tasks identified forthe maintenance functions authorized in the maintenance allocation chart. The symbol designations for thevarious maintenance categories are as follows:1 Services - inspect, test, service, adjust, align, calibrate, and/or replace.2 Fault locate/troubleshoot- the process of investigating and detecting the cause of equipmentmalfunctioning; the act of isolating a fault within a system or unit under test (UUT).3 Disassemble/assemble - encompasses the step-by-step taking apart (or breakdown) of a spare/functionalgroup coded item to the level of its least componency identified as maintenance significant (i.e., assigned anSMR code) for the category of maintenance under consideration.4 Actions - welding, grinding, riveting, straightening, facing, remachining, and/or resurfacing.B-2
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