TM 5-4940-228-14
C-3. Column Entries Used in The MAC.
a. Column 1, Group Number. Column 1 lists group numbers, the purpose of which is to identify com-
ponents, assemblies, subassemblies, and modules with the next higher assembly.
b. Column 2, Component/Assembly. Column 2 contains the name of components, assemblies, subassem-
blies, and modules for which maintenance is authorized.
c. Column 3, Maintenance Functions. Column 3 lists the functions to be performed on the item listed in
column 2. (For detailed explanation of these functions, see para C-2)
d. Column 4, Maintenance Level. Column 4 specifies, by listing of a “work time” figure in appropriate
subcolumn(s), the lowest level of maintenance authorized to perform the function listed in column 3. This fig-
ure represents the active time required to perform the maintenance function at the indicated level of mainte-
nance. If the number or 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 number of man-hours
specified by the “work time” figure represents the average time required to restore an item (assembly, subas-
sembly, component, module, end item, or system) to a serviceable condition under typical field operating con-
ditions. This time includes preparation time, troubleshooting 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 levels
are as follows:
C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operator or crew
O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Organization maintenance
F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Direct support maintenance
H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General support maintenance
D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Depot maintenance
e. Column 5, Tools and Equipment. Column 5 specifies, by code, those common tool sets (not individual
tools) and special tools, test and support equipment required to perform the designated functions. (not appli-
cable)
f. Column 6, Remarks. Column 6 specifies, by code, remarks referred to in Section IV.
C-4. Column Entries Used in Tool and Test Equipment Requirements.
a. Column 1, Tool or Test Equipment Reference Code. The tool and test equipment reference code cor-
relates with a maintenance function on the identified end item or component.
b. Column 2, Maintenance Level. The lowest level of maintenance authorized to use the tool or test
equipment.
c. Column 3, Nomenclature. Name of identification of the tool or test equipment.
d. Column 4, National/NATO Stock Number. The National or NATO stock number of the tool or test
equipment.
e. Column 5, Tool Number. The manufacturer’s part number.
C-5. Explanation of Columns in Section IV.
a. Reference Code. The code scheme recorded in column 6, Section II.
b. Remarks. This column lists information pertinent to the maintenance function being performed as in-
dicated on the MAC, Section II.
C-2
