h. Replace. To remove an unserviceable item and install a serviceable counterpart in its
place. Replace is authorized by the MAC and is shown as the third position code of the SMR code,
Repair. The application of maintenance services,
including fault location/trouble-
shooting, removal/installation, and disassembly/assemble procedures, and maintenance actions to
identify- troubles and restore serviceability to
malfunction, or failure in a part, subassembly,
Overhaul. That maintenance effort
completely serviceable/operational condition as
technical publications (i.e., DMWR). Overhaul
an item by correcting specific damage, fault,
module (component or assembly), end item, or
(service/action) prescribed to restore an item to a
required by maintenance standards in appropriate
is normally the highest degree of maintenance
performed by the Army. Overhaul does not normally return an item to like new condition.
k. R e b u i l d . 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 equipment/components.
EXPLANATION OF COLUMNS IN THE MAC, SECTION II.
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, 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 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
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:
... . . .. . . . . .
Unit (Operator or Crew)
. . . . . . . . . . . . . . . . .
Unit Organizational Maintenance
. .... . . . . . . . . .
Intermediate Direct Support Maintenance
. . . . . . . . . . .
Intermediate General Support 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
f. Column 6, Remarks. This column shall,
alphabetic order, which shall be keyed to the remarks
when applicable, contain a letter code, in
contained in Section IV.