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Page Title: d. Column 4, Maintenance Level.
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TM 9-4110-257-14 B-3. EXPLANATION OF COLUMNS IN THE MAC, SECTION II. - Continued 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 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 H  General Support Maintenance e. Column 5. Tools and Equipment Reference Code.   Column  5  specifies,  by  code,  those  common  tool  sets  (not individual tools) common, TMDE, and special tools, special TMDE, and special support equipment required to perform the designated function. Codes are keyed to tools and test equipment in section 1II. 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. 5This maintenance level is not included in Section II, column (4) of the Maintenance Allocation Chart.  Functions to this level of maintenance are identified by a work-time figure in the "H" column of Section II, column (4), and an associated reference code is used in the Remarks column (6).  This code is keyed to Section IV, Remarks, and the SRA complete repair application is explained there. B-3

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