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Page Title: Explanation Of Columns In The MAC, Section II
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TM 10-4310-391 -13&P i.    Repair.    The    application    of    maintenance    services, 1    including    fault    location/troubleshooting, 2 removal/installation and disassembly/assembly procedures 3 end maintenance actions, 4 to identify troubles and restore   serviceability   to   an   Item   by   correcting   specific   damage,   fault,   malfunctions,   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  completely serviceable/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 does not normally return an Item to like-new condition. k. Rebuild Consists of those services/actions necessary for the restoration of unserviceable equipment to a  like-new  condition  in  accordance  with  original  manufacturing  standards.  Rebuild  is  the  highest  degree  of materiel maintenance applied 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. B-3. Explanation Of Columns In The MAC, Section II. a. Column 1. Group  Number Column 1 lists functional group code numbers, the purpose of which Is to Identify  maintenance  significant  components,  assemblies,  subassemblies,  and  modules  with  the  next  higher assembly. End item group number shall be "00.” 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  Item  listed  in column 2. (For a 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  In  the appropriate 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 category of maintenance. If the number or complexity of the tasks within the listed maintenance function vary at different maintenance categories, appropriate work time figures will be shown for each 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   field   operating   conditions.   This   time   Includes preparation time (including any necessary disassembly/ assembly time), troubleshooting/fault location time, and quality assurance/quality control time in addition to the time required to perform the specific tasks Identified for the  maintenance  functions  authorized  In  the  maintenance  allocation  chart.  The  symbol  designations  for  the various maintenance categories are as follows . 1    Services - Aspect, test, service, adjust, align, calibrate, and/or replace 2      Fault   locate/troubleshoot-   the   process   of   investigating   and   detecting   the   cause   of   equipment malfunctioning, 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    breakdowns    of    a spare/functional  group  coded  item  to  the  level  of  its  least  componency  identified  as  maintenance significant (ie, assigned an SMR code) for the category of maintenance under consideration 4    Actions - welding, grinding, riveting, straightening, facing, re-machining, and/or resurfacing B-2

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