B-2. MAINTENANCE FUNCTIONS (Continued)
including fault location/troubleshooting,
and disassembly/assembly procedures,
and maintenance actions to identify
troubles and restore serviceability to an item by correcting specific damage, fault, malfunction, or
failure in a part, subassembly, module (component or assembly), end item, or system.
j. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a com-
pletely serviceable/operational condition as required by maintenance standards in appropriate technical
publications (i.e. DMWR). Overhaul is normally the highest degree of maintenance performed by the
Army. Overhaul does not normally return an item to like new condition.
k. Rebuild. Consists of those services/actions necessary for the restoration of unserviceable
equipment to a like new condition in accordance with original manufacturing standards. Rebuild is the
highest degree of material maintenance applied to Army equipment. The rebuild operation includes the
act of returning to zero those age measurements (hours/miles, etc.) considered in classifying Army
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. End item group number shall be 00.
b. Column 2, Components/Assembly.
Column 2 contains the names of the 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 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 maintenance. If the number or complexity of the tasks within the listed mainte-
nance 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 levels are as follows:
C - Operator or crew
O - Unit 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, TMDE, and support equipment required to perform the designated
f. Column 6, Remarks. This column is provided for referencing by code the remarks (Section IV)
pertinent to the maintenance functions.