B-3. EXPLANATION OF COLUMNS IN THE MAC, SECTION II
Column 1, Group Number.
Column 1 lists functional group code numbers, the
purpose of which is to identify maintenance significant components, assemblies, sub-
assemblies, and modules with the next higher assembly.
End item group number shall be
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b. Column 2, Component/Assembly.
Column 2 contains the 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 item listed in Column 2. (For detailed explanation of these functions, see
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 mainte-
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 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 categories are as follows:
Operator or crew
Direct Support Maintenance
General Support Maintenance
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.
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.