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APPENDIX  B MAINTENANCE ALLOCATION CHART
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Explanation of Columns In Remarks, Section IV
TM 1-4920-448-13&P i Repair.  The  application  of  maintenance  services  including  fault  location/troubleshooting,  removal/installa- tion,  and  disassembly/assembly  procedures,  and  maintenance  actions  to  identify  troubles  and  restore  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  The  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., DMVVR). 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 service/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  operation  includes  the  act  of  returning  to  zero  those  age measurements (hours, miles, etc.) considered in classifying Army equipments/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  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  assurancdquality  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  areas  follows: AVUM Aviation Unit Maintenance AVIM Aviation  intermediate  Maintenance DEPOT Depot   Maintenance . e.  Column 5 Tools and Equipment . Column 5 specifies, by code, those common tool sets (not individual tools) and  special  tools,  TMDE,  and  support  equipment  required  to  perform  the  designated  function. f. Column 6 Remarks This column shall, when applicable, contain a letter code, in alphabetic order, which shall  be  keyed  to  the  remarks  contained  in  Section  IV. B-2

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