TM 9-6115-664-13&P
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 item 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 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
L
Specialized Repair Activity (SRA) (5)
H
General support maintenance
D
Depot maintenance
e.
Column 5, Tools and Test Equipment Reference Code. Column 5 specifies, by code, the 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 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.
(5) This maintenance level is not included in Section II, Column 4 of the MAC. Functions to this level of maintenance are
identified by a work-time figure in the "H" column in Section II, Column 4, and an associated reference code is used in the
Remarks column. This code is keyed to Section IV, remarks, and the SRA complete repair application is explained there.
B-3
