TM 10-1670-286-20
EXTRACTION LINE PANEL 0021 00
MAINTENANCE ALLOCATION CHART
0021 00-2
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 by the Army. Overhaul does not normally
return an item to like new condition.
Rebuild. Consists of those services/actions necessary for the restoration or 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, ect.) considered in classifying Army equipment/components.
EXPLANATION OF COLUMNS IN THE MAC, SECTION II.
Column 1, Group Number. Column 1 lists functional group codes numbers, the purpose of which is to identify
maintenance significant components, assemblies, subassemblies, and modules for which maintenance is
authorized.
Column 2, Component/Assembly. Column 2 contains the names of components, assemblies, subassemblies,
and modules for which maintenance is authorized.
Column 3, Maintenance Category. Column 3 lists the function to be performed on the item listed in column 2
(For detailed explanation of these functions, see paragraph B-2).
Column 4, Maintenance Category. Column 4 specifies, by the listing of a work time figure in appropriate
subcolumn (s), the category 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 category of
maintenance. If the number or the complexities of the tasks within the listed maintenance function vary at
different maintenance categories, appropriate 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 and necessary disassembly/assembly time), troubleshooting/fault location time, and
quality assurance/quality control time in addition to the time required to perform the specific task identified of the
maintenance allocation chart. The symbol designations for the various maintenance categories are as follows:
C
Operator or Crew
O
Unit Maintenance
F
Intermediate – DS Maintenance
H
Intermediate – GS Maintenance
D
Depot Maintenance
Column 5, Tools and Equipment. Column 5 specifies, by code, those common tools sets (not individual tools)
and special tools, TMDE, and support equipment required to perform the designated function.
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.
EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT REQUIREMENTS, SECTION III.
Column 1, Reference Code. The tool and test equipment reference code correlates with a code used in the
MAC, Section II, Column 5.
Column 2, Maintenance Category. The lowest category of maintenance authorized to use the tool or test
equipment.
Column 3, Nomenclature. Name of identification of the tool or test equipment.
