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Page Title: EXPLANATION OF COLUMNS IN THE MAC, SECTION II
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TM5-4120-376-14 i.  Repair.  The  application  of  maintenance  services. (1)  Including  fault  location/troubleshooting. (2)   Removal/installation,   and   disassembly/assembly. (3)   procedures   and   maintenance   actions. (4)   To   identify   troubles   and   restore   serviceability   to   an   item   correcting   specific   damage, fault,   malfunction,   or   failure   in   a   part,   subassembly,   module   (component   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   appropri- ate  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  material  maintenance  applied  to  Army  equipment.  The  rebuild opera-tion  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.   Services.   Inspect,   test,   service,   adjust,   align,   calibrate,   and/or   replace. b.   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). c.   Disassemble/assemble-encompasses   the   step-by-step   taking   apart   (or   breakdown)   of   a spare/functional  group  coded  item  to  the  level  of  its  least  componency  identified  as maintenance  significant  (i.e.,  assigned  an  SMR  code)  for  the  category  of  maintenance  under consideration. d.   Actions.   Welding,   grinding,   riveting,   straightening,   facing,   remachinery,   and/or resurfacing. (1)  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”. (2)   Column   (2),   Component/Assembly.   Column   contains   the   names   of   components, assemblies,  sub-assemblies,  and  modules  for  which  maintenance  is  authorized. (3)   Column   (3),   Maintenance   Functions. Column  3  lists  the  functions  to  be  performed  on the  item  listed  in  Column  2.  (For  detailed  explanation  of  these  functions,  see  paragraph  B-2). (4)  Column  (4),  Maintenance  Level.  This  column  is  made  up  of  sub-columns  for  each category   of   maintenance.    Work   time   figures   are   listed   in   these   subcolumns   for   the   lowest   level of  maintenance  authorized  to  perform  the  function  listed  in  Column  3.  These  figures  indicate B-2

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