serviceability to an item by correcting specific damage, fault, malfunction, or
failure in a part, subassembly, module (component or assembly), end item, or system.
j. Overhaul. The maintenance effort (service/action) necessary to restore an
item to a completely serviceable/operational condition as prescribed by maintenance
standards (i.e., DMWR) in appropriate technical publications. 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 service/actions necessary for the restoration of
unserviceable equipment to a like new condition in accordance with original manufac-
turing 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. Column Entries.
a. Column 1. Group Number. Column 1 lists group numbers, the purpose of which
is to ide ntify components, assemblies, subassemblies, and modules with the next
b. Column 2. Component/Assembly. Column 2 contains the noun names of com-
ponents, asseblies, subasseblies, and modules for which maintenance is authorized.
c. Column 3. Maintenance Functions. Colum 3 lists the functions to be per-
formed on the item listed in column 2. When items are listed without maintenance
functions, it is solely for the purpose of having the group number in the MAC and
d. Column 4. Maintenance Category. Column 4 specifies, by the listing of "work
time" figures in the appropriate subcolumn(s), the lowest 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 category
of maintenance. If the number or complexity of the tasks within the listed main-
tenance function vary at different maintenance categories, appropriate "work time"
figures will be shown for each category. The number of task-hours specified by the
"work time" figure represents the average time required to restore an item
(assembly, subassembly, component, module, end item or system) to a serviceable con-
dition under typical field operating conditions. This time includes preparation
time, troubleshooting time, and quality asssurance/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. Subcolumns of column 4
are as follows: