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Page Title: EXPLANATION OF COLUMNS IN THE MAC, SECTION II
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TM5-4120-387-14 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. Column  3,  Maintenance  Functions. Column 3 lists the functions to be per- formed on the item listed in column 2. (For  detailed  explanation  of  these  func- tions, 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  cate- gory 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  oper– sting  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  task  identified  for  the  maintenance  functions  authorized  in  the  mainte- nance allocation chart. The  symbol  designations  for  the  various  maintenance categories are as follows: c  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operator  or  Crew o . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Organizational   Maintenance F  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Direct  Support  Maintenance H  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General  Support  Maintenance D  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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-3

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