TM 11-6625-291-14/TO 33A1-7-23-1
B-2. MAINTENANCE FUNCTION. (CONT)
Replace. To remove an unserviceable item and install a serviceable counterpart in its
h.
place. `Replace' is authorized by the MAC and is shown as the 3rd position code of the SMR
code.
Repair. The application of maintenance services, including fault
i.
location/trouble-shooting, removal/installation, 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.
Overhaul. That maintenance effort (service or action) prescribed to restore an item to a
j.
completely 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 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.
Column 1, Group Number. Column 1 lists functional group code numbers, the purpose of
a.
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, Component/Assembly. Column 2 contains the names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
Column 3, Maintenance Function. Column 3 lists the functions to be performed on the item
c.
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 maintenance function vary at different
maintenance categories, appropriate work time figures wiII 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 categories are as follows:
C -- Operator or crew
O -- Organizational Maintenance
F -- Direct Support Maintenance
H -- General Support Maintenance
L -- Specialized Repair Activity (SRA)
D -- Depot Maintenance
B-2
