B-2. MAINTENANCE FUNCTIONS (Cont).
Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely
serviceable/operational condition as required 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 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
B-3. EXPLANATION OF COLUMNS IN THE MAC, SECTION Il.
a. Column 1, Group Number. Column 1 lists functional group code numbers, the purpose of which is
to identify maintenance significant components, assemblies, subassemblies, and modules with the next
higher assembly. End item group number shall be 00.
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 Function. Column 3 lists the functions to be performed on the item listed
in Column 2, (For a detailed explanation of these functions, refer to 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 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 work time figures will be shown for each level. 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 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 . . . . . Unit (Operator or Crew)
O . . . . . Unit Maintenance
. . . . . Direct Support Maintenance
H . . . . . General 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, TMDE, and support equipment required to perform the designated function.
f. Column 6, Remarks. This column shall, when applicable, contain a letter
which shall be keyed to the remarks contained in Section IV.
EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT
code, in alphabetic
a. Column 1, Tool or Test Equipment Reference Code. The tool and test equipment reference code
correlates with a code used in the MAC, Section II, Column 5.
b. Column 2, Maintenance Level. The lowest level of maintenance authorized to use the tool or test