MAINTENANCE ALLOCATION CHART (FOR ARMY ONLY)
a. This section provides a general explanation of
all maintenance and repair functions authorized at
various maintenance levels.
b. Section II designates overall responsibility for
the performance of maintenance functions on the
identified end item or component and the work mea-
surement time required to perform the functions by
the designated maintenance level. The imple-
mentation of the maintenance functions upon the
end item or component will be consistent with the
assigned maintenance functions.
c. Section III lists the tools and test equipment
required for each maintenance function as refer-
enced from Section II.
C-2. Explanation of Columns in Sec-
a. Column 1, Group Number. Column 1 lists
group nubmers to identify related components, as-
semblies, subassemblies, and modules with their
next higher assembly. The applicable groups are
listed in the MAC in disassembly sequence begin-
ning with the first group removed.
b. Column 2, Component/Assembly. This col-
umn contains the noun names of components, as-
semblies, subassemblies and modules for which
maintenance is authorized.
c. Column 3, Maintenance Functions. This
column lists the functions to be performed on the
item listed in Column 2. The maintenance functions
are defined as follows:
(1) Inspect. To determine serviceability of an
item by comparing its physical, mechanical, and/or
electrical characteristics with established stan-
dards through examination.
(2) Test. To verify serviceability and detect
incipient failure by measuring the mechanical or
electrical characteristics of an item and comparing
those characteristics with prescribed standards.
(3) Service. Operating required periodically
to keep an item in proper operating condition, i.e., to
clean (decontaminate), to preserve, to drain, to
paint, or to replenish fuel, lubricants, hydraulic flu-
ids, or compressed air supplies.
(4) Adjust. To maintain within prescribed
limits, by bringing into proper or exact position, or
by setting the operating characteristics to specified
(5) Align. To adjust specified variable ele-
ments of an item to bring about optimum or desired
(6) Calibrate. To determine and cause cor-
rections to be made or to be adjusted on instruments
or test measuring and diagnostic equipments used
in precision measurement. Consists of comparison
of two instruments, one of which is a certified stan-
dard of known accuracy, to detect and adjust any
discrepancy in the accuracy of the instrument being
(7) Install. The act of emplacing, seating, or
fixing into position an item, part or module (com-
ponent or assembly) in a manner to allow the proper
functioning of an equipment or system.
(8) Replace. The act of substituting a ser-
viceable like type part, subassembly, or module
(component or assembly) for an unserviceable coun-
(9) Repair. The application of maintenance
services (inspect, test, service, adjust, align, cali-
brate, or replace) or other maintenance actions
(welding, grinding, riveting, straightening, facing,
remachining or resurfacing) to restore ser-
viceability to an item by correcting specific damage,
fault, malfunction, or failure in a part, subassem-
bly, module (component or assembly), end item, or
(10) Overhaul. That maintenance effort (ser-
vice/action) necessary to restore an item to a com-
pletely serviceable/operational condition as pre-
scribed by maintenance standards (i.e., DMWR) in
appropriate technical publications. Overhaul is nor-
mally the highest degree of maintenance performed
by the Army. Overhaul does not normally return an
item to a like new condition.
(11) Rebuild. Consists of those services/ac-
tions necessary for the restoration of unserviceable
equipment to a like new condition in accordance