TM 5-4220-226-14&P
B-2. Maintenance Functions-continued.
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 the 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
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.
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 Level. 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 level of
maintenance. If the number or complexity of the tasks within the listed maintenance function varies at different
maintenance levels, appropriate work time figures will be shown for each level. 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. The 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:
Unit
C (Operator)
O (Unit)
Intermediate
F (Direct Support)
H (General Support)
Depot
D (Depot)
e. Column 5, Tools and Equipment. Column 5 specifies, by a 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.
B-2
