The act of substituting a serviceable-like type
part, subassembly, or module (component or assembly) for an unservice-
The application of maintenance services (inspect,
test, service, adjust, align, calibrate, or replace) or other mainten-
ance actions (welding, grinding, riveting, straightening, facing, re-
machining, or resurfacing) to restore serviceability to an item by
correcting specific damage, fault, malfunction, or failure in a part,
subassembly, module (component or assembly), and item, or system.
That maintenance effort (services/actions) neces-
sary to restore an item to a completely serviceable/operational condi-
tion as prescribed by maintenance standards (i.e., DMWR) in appropri-
ate 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.
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 material maintenance applied to Army equipment.
The rebuild operation includes the act of returning to zero those
age measurement (hours/miles, etc.) considered in classifying Army
COLUMN ENTRIES USED IN THE MAC.
Column 1, Group Number.
Column 1 lists group numbers, the
purpose of which is to identify components, assemblies, subassemblies,
and modules with the next higher assembly.
Column 2, Component/Assembly.
Column 2 contains the names
of components, assemblies, subassemblies and modules for which
maintenance is authorized.
Column 3, Maintenance Functions.
Column 3 lists the func-
tions to be performed on the item listed in column 2.
explanation of these functions, see paragraph D-2.)
Column 4, Maintenance Level.
Column 4 specifies, by the
listing of a work time figure 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 per-
form the maintenance function at the indicated level of maintenance.
If the number or complexity of the tasks within the listed mainten-
ance functions vary at different maintenance levels, appropriate work,
time figures will be shown for each level. The number of manhours
specified by the work time figure represents the average time re-
quired to restore an item (assembly, subassembly, components, module,
end item, or system) to a serviceable condition under typical field
This time includes preparation time, trouble-
shooting 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.