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TM 11-5820-919-12
i. Repair. The application of maintenance services (inspect, test, service, adjust, align, calibrate, replace) or other
maintenance actions (welding, grinding, riveting, straightening, facing, remachining, or resurfacing) 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 (service/action) 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 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 equipments/components.
B-3. Column Entries
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 noun 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.
When items are listed without maintenance functions, it is solely for purpose of having the group numbers in the MAC and
RPSTL coincide.
d. Column 4, Maintenance Category. 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 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 will be shown for each category. The number of task 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. Subcolumns of column 4 are
as follows:
C- Operator/Crew
O- Organizational
F- Direct Support
H- General Support
D - Depot
e. Column 5, Tools and Equipment. Column 5 specifies by code, those common tool sets (not individual tools) and
special tools, test, and support equipment required to perform the designated function
f. Column 6, Remarks. Column 6 contains an alphabetic code which leads to the remark in section IV, Remarks,
which is pertinent to the item opposite the particular code.

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