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TM 55-1905-223-24-18-2
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
of 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 equipments/components.
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 Function. 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 Level.  Column 4 specifies, by the listing of a "worktime" 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 level of
maintenance. If the number or complexity of the tasks within the listed maintenance function vary at different
maintenance levels appropriate "worktime" figures will be shown for each level. The number of task-hours
specified by the "worktime" 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


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