TM 10-4320-309-14
TM 4320-14/1
h. Replace. TO remove an unserviceable item and install a serviceable counterpart in its place. “Replace” is
authorized by the MAC and is shown as the third position code of the SMR code.
i.
Repair. The application of maintenance services, including fault location/troubleshootings removal/installa-
tion, and disassembly/assembly procedures, and maintenance actions, to identify troubles and restore ser-
viceability 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 completely service-
able/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 materiel 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 functional group code numbers, the purpose of which is to identify
maintenance significant components, assemblies, subassemblies, and modules with the next higher as-
sembly. End item group number shall be "00"
b.
Column 2. Component/Assembly. Column 2 contains the names of components, assemblies, sub-assem-
blies, 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 a detailed explanation of these functions, see paragraph B-2)
d. Column 4. Maintenance Category. Column 4 specifies, by the listing of a worktime figure in the appropriate
subcolumn(s), the category of maintenance authorized to perform the function listed in column 3. This fig-
ure 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 maintenance function vary at differ-
ent 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, sub-assembly, component, mod-
ule, end item, or system) to a serviceable condition under typical field operating conditions. This time in-
cludes preparation time (including any necessary disassembly/assembly time),
B-2
