TM 9-4910-387-14-2
b. Column 2, Component/Assembly. Column 2 contains the names
MAINTENANCE FUNCTIONS (cont)
of components, assemblies, subassemblies, and modules for which
maintenance is authorized.
1
c. Column 3, Maintenance Function. Column 3 lists the functions to
i. Repair.
The application of maintenance services or other
2
be performed on the item listed in Column 2. (For detailed explanation of
maintenance actions to restore serviceability to an item by correcting
these functions, see para B-2.)
specific damage, fault, malfunction, or failure in a part, subassembly,
module (component or assembly), end item, or system.
d. Column 4, Maintenance Category. Column 4 specifies, by the
j. Overhaul. That maintenance effort (service/action) necessary to
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
restore an item to a completely serviceable/operational condition as
figure represents the active time required to perform that maintenance
prescribed by maintenance standards in appropriate technical publications
function at the indicated category of maintenance. If the number or
(i.e., DMWR). Overhaul is normally the highest degree of maintenance
complexity of the tasks within the listed maintenance function vary at
performed by the Army. Overhaul does not normally return an item to like
different maintenance categories, appropriate work time figures will be
new condition.
shown for each category. The work time figure represents the average time
k. Rebuild. Consists of those services/actions necessary for the
required to restore an item (assembly, subassembly, component, module,
restoration of unserviceable equipment to a like new condition in accordance
end item, or system) to a serviceable condition under typical field operating
with original manufacturing standards. Rebuild is the highest degree of
conditions. This time includes preparation time, troubleshooting time, and
materiel maintenance applied to Army equipment. The rebuild operation
quality assurance/quality control time in addition to the time required to
includes the act of returning to zero those age measurements (hours/miles,
perform the specific tasks identified for the maintenance functions
etc) considered in classifying Army equipments/components.
authorized in the maintenance allocation chart. The symbol designations for
the various maintenance categories are as follows:
B-3. EXPLANATION OF COLUMNS IN THE MAC, SECTION II
C....................................................................................... Operator or crew.
a. Column 1, Group Number. Column 1 lists group numbers, the
O .....................................................................Organizational maintenance.
purpose of which is to identify components, assemblies, subassemblies, and
F .......................................................................Direct support maintenance.
modules with the next higher assembly.
H................................................................... General support maintenance.
D................................................................................... Depot maintenance.
1
Services-inspect, test, service, adjust, aline, calibrate, or replace.
2
Actions--welding, grinding, riveting, straightening, facing, remachining, or
resurfacing.
B-2
