TM 3-4230-204-12&P
function at the indicated level of maintenance. If the number or complexity
j. Overhaul. That maintenance effort (service/action) prescribed to
of the tasks within the listed maintenance function vary at different
restore an item to a completely serviceable/operational condition as
maintenance levels, appropriate work time figures will be shown for each
required by maintenance standards in appropriate technical
level. The work time figure represents the average time required to restore
publications (i.e., DMWR). Overhaul is normally the highest degree
an item (assembly, subassembly, component, module, end item, or system)
of maintenance performed by the Army. Overhaul does not
to a serviceable condition under typical field operating conditions. This time
normally return an item to like new condition.
includes preparation time (including any necessary disassembly/assembly
k. Rebuild. Consists of those services/actions necessary for the
time), troubleshooting/fault location time, and quality assurance/quality
restoration of unserviceable equipment to a like new condition in
control time in addition to the time required to perform the specific tasks
accordance with original manufacturing standards. Rebuild is the
identified for the maintenance functions authorized in the maintenance
highest degree of materiel maintenance applied to Army equipment.
allocation chart. The symbol designations for the various maintenance
The rebuild operation includes the act of returning to zero those age
levels are as follows:
measurements (hours/miles, etc.) considered in classifying Army
equipment/components.
C ............ Operator or Crew
B-3.
EXPLANATION OF COLUMNS IN THE MAC, SECTION II.
O ............ Unit Maintenance
F............. Intermediate-Direct Support Maintenance
a. Column 1, Group Number. Column 1 lists functional group code
H ............ Intermediate-General Support Maintenance
numbers, the purpose of which is to identify maintenance significant
L ............. Specialized Repair Activity (SRA)
components, assemblies, subassemblies, and modules with the next higher
assembly. End item group number shall be "00."
D ............ Depot Maintenance
b. Column 2, Component/Assembly. Column 2 contains the names of
components, assemblies, subassemblies, and modules for which
e. Column 5, Tools and Equipment. Column 5 specifies, by code,
maintenance is authorized.
those common tool sets (not individual tools) and special tools, TMDE, and
c. Column 3, Maintenance Function. Column 3 lists the functions to be
support equipment required to perform the designated function.
performed on the item listed in column 2. (For detailed explanation of these
f. Column 6, Remarks. This column shall, when applicable, contain a
functions, see paragraph B-2.)
letter code, in alphabetic order, which shall be keyed to the remarks
d. Column 4, Maintenance Level. Column 4 specifies, by the listing of
contained in section IV.
a work time figure in the 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
B-2
