TM5-6130-301-13&P
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 or components.
B-3. COLUMN ENTRIES USED IN THE MAC.
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 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 tern listed in
Column 2. (For detailed explanation of these functions, see Paragraph B-2).
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 the 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 work time figures will be shown for each level. The number of manhours specified by the
work time figure represents the average time required to restore an item (assembly, subassembly, component,
module, end item, or system) to 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. The symbol designations for the various maintenance levels are as follows:
C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operator or Crew
O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Organization maintenance
F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Direct support maintenance
H. . . . . . . . .. . . .. . . . .. . . .. . . . . . . . . . .. . . . . . . . Genral support maintenance
D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Depot maintenance
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. This column shall contain a letter code in alphabetical order which shall be keyed to
the remarks contained in Section IV.
B-4. COLUMN ENTRIES USED IN TOOL AND TEST EQUIPMENT REQUIREMENTS.
a. Column 1, Tool or Test Equipment Reference Code. The tool and test equipment reference code correlates
with a maintenance function on the identified end item or component.
b. Column 2, Maintenance Level. The lowest level of maintenance authorized to use the tool or test
equipment.
c. Column 3, Nomenclature. Name or identification of the tool or test equipment.
d. Column 4, National/NATO Stock Number. The National or NATO stock number of the tool or test
equipment.
e. Column 5, Tool Number. The manufacturer's part number.
B-2
