TM 9-4120-370-14
TO 35E9-229-1
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j. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely service-
able/operational condition as require 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 serviceslactions 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 mea-
surements (hours/miles, etc.) considered in classifying Army equipments/components.
B-3 EXPLANATION OF COLUMNS IN THE MAC, SECTION III.
a. Column 1, Group Number. Column 1 lists functional group code numbers, the purpose of which is to iden-
tify maintenance significant components, assemblies, subassemblies, and modules with the next highe' assembly,
End item group number shall be "00".
b. Column 2, Component/Assembly, Column 2 contains the names of components, assemblies, su-
bassemblies, 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 Col-
umn 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 appropri-
ate subcolumn(s), the category of maintenance authorized to perform the function listed in Column 3. This figure rep-
resents 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, ap-
propriate work time figures will 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 hme required to
perform the specific task 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 . . . . . . . . Unit Maintenance
F . . . . . . . . . . . Direct Support Maintenance
H . . . . . . . . . . . General Support Maintenance
D . . . . . . . . . . Depot Maintenance
e. Column 5, Tools and Equipment. Column 5 specifies, by code, those common toolsets (not individual
tools and special tools, TMDE, and support equipment required to perform the designated function.
f. Column 6, Remarks. This column shall, when applicable, contain a letter code, in alphabetic order, which
shall be keyed to the remarks contained in Section IV.
B-4 EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT REQUIREMENTS, SECTION III.
a. Column 1, Reference Code, The tool and test equipment reference code correlates with a code used m
the MAC, Section 11, Column 5.
b. Column 2, Maintenance Category. The lowest category 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 Stock Number. The national stock number of the tool or test equipment
e. Column 5, Tool Number. The manufacturer's part number,
B-5 EXPLANATION OF COLUMNS IN SECTION IV.
a. Column 1, Reference Code. The code recorded in Column 6, Section 11.
b. Column 2, Remarks. This column lists information pertinent to the maintenance function being performed
as indicated in the MAC, Section Il.
