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Page Title: Explanation of Columns In the MAC, SECTION II
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TM10-4320-316-14 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. 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 Level.    Column  4  specifies  each  level  of  maintenance  authorized  to  perform  each function listed in Column 3, by indicating work time required (expressed as man hours in whole hours or decimals)in the appropriate subcolumn.  This work-time figure represents the active time required to perform that maintenance function at the indicated level of maintenance.  If the number or complexity of the tasks within the listed maintenance function vary at different maintenance levels, appropriate work-time figures are to be shown for each level.  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 levels are as follows: C ...............  Operator or crew maintenance O ...............Unit maintenance F ...............Direct support maintenance L ...............Specialized Repair Activity (SRA) H ...............General support maintenance D ...............Depot maintenance e.  Column 5, Tools and Test Equipment reference code.  Column 5 specifies, by code, those common tools sets (not individual tools), common TMDE, and special tools, special TMDE, and support equipment required to perform the designated function.  Codes are keyed to tools and test equipment in section III. f.   Column  6.    Remarks.    When  applicable,  this  column  contains  a  letter  code,  in  alphabetical  order,  which  is keyed to the remarks contained in Section IV. B-4.  Explanation of Columns In Tools and Test Equipment Requirements, Section III. a.  Column 1, Reference Code.  The tool and test equipment reference code correlates with a code used in the MAC, Section II, Column 5. b.  Column 2, Maintenance Level.  The lowest level of maintenance authorized to use the tool or test equipment. c.  Column 3, Nomenclature.  Name or identification of the tool or test equipment. d.  Column 4, National Stock Number.  The National stock number of the tool or test equipment. B-3

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