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, subassemblies, and modules with the next
higher assembly. End item group numbers are "00".
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 a detailed explanation of these functions, see paragraph B-2).
Column 4, Maintenance Level. Column 4 specifies, by the listing of a work time figure (expressed as man-
hours shown as whole hours or decimals) in the appropriate subcolumn(s), the level 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 level of maintenance. If the number or the complexity
of the tasks within the listed maintenance function vary at different maintenance levels, appropriate work
time figures will 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 item 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 system
designations for the various maintenance levels are shown on the following page.
C ...............Operator or crew
O ...............Unit Maintenance
F ................Direct Support Maintenance
L ................Specialized Repair Activity (SRA)5
H................General Support Maintenance
Column 5, Tools and Equipment. Column 5 specifies, by code, those common tool 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.
Column 6, Remarks. This column, when applicable, contains a letter code, in alphabetic 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.