Quantcast Explanation of Columns in the MAC - TM-9-2330-394-13-P1375

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TM 9-2330-394-13&P
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Explanation of Columns in the MAC
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
Column (2) - Component/Assembly. Column (2) contains the item names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
Column (3) - Maintenance Function. Column (3) lists the functions to be performed on the items listed in
column (2). (For a detailed explanation of these functions, refer to "Maintenance Functions" outlined
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 in manhours 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
MAC. The symbol designations for the various maintenance levels are as follows:
C - Operator or crew maintenance
O Field Level (Unit) maintenance
Sustainment (Direct Support) maintenance
Specialized Repair Activity (SRA)
Sustainment (General Support) maintenance
Depot maintenance
The "L" maintenance level is not included in column (4) of the MAC. Functions to this level
of maintenance are identified by a work time figure in the "H" column of column (4), and
an associated reference code is used in the REMARKS column (6). This code is keyed to
the remarks and the SRA complete repair application is explained there.
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 special support
equipment required to perform the designated functions. Codes are keyed to the tools and test equipment
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