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 TM 5-2010-205-14
h. Replace. The act of substituting a serviceable like part, subassembly, or module (component or assembly) for
an unserviceable counterpart.
i.
Repair. The application of maintenance services or other maintenance actions to 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 (services/actions) necessary to restore an item to a completely
serviceable/operational condition as prescribed by maintenance standards (i.e., DMWR) in appropriate technical
publications. 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 equipment/components.
B-3. EXPLANATION OF COLUMNS IN THE MAC, SECTION II.
a. Column 1, Group Number. Column 1 lists group numbers, the purpose of which is to identify components,
assemblies, subassemblies, and modules with the next higher assembly.
b. Column 2, Component/Assembly. Column 2 contains the names of components, assemblies,
subassemblies, 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. B-2).
d. Column 4, Maintenance Level. Column 4 specifies, by the listing of a "work time" figure in the appropriate
subcolumn(s), the lowest level of maintenance authorized to perform the maintenance function at the indicated level of
maintenance. If the number of complexity of the tasks within 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,
subassembly, component, module, end item, or system) to a serviceable condition under typical field operating
conditions. 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:
B-2
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