MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION.
a. This section provides a general explanation of
all maintenance and repair functions authorized at
various maintenance levels.
b. The Maintenance Allocation Chart (MAC) in
Section II designates overall responsibility for the
performance of maintenance functions on the iden-
tified end item or component. The implementation
of the maintenance functions upon the end item or
component will be consistent with the assigned
c. Section III lists the special tools and test
equipment required for each maintenance function
as referenced from section II (Not Applicable).
d. Section IV contains supplemental instruc-
tions on explanatory notes for a particular
maintenance function (Not Applicable).
B-2. Maintenance Functions.
a. Inspect. To determine the serviceability of an
item by comparing its physical, mechanical and/or
electrical characteristics with established stan-
dards through examination.
b. Test. To verify serviceability and detect inci-
pient failure by measuring the mechanical or elec-
trical characteristics of an item and comparing
those characteristics with prescribed standards.
c. Service. Operations 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
fluids, or compressed air supplies.
d. Adjust. To maintain, within prescribed
limits, by bringing into proper or exact position, or
by setting the operating characteristics to
e. Align. To adjust specified variable elements
of an item to bring about optimum or desired per-
f. Calibrate. To determine and cause correc-
tions to be made or to be adjusted on instruments
or test measuring and diagnostic equipments used
in precision measurement. Consists of com-
parisons of two instruments, one of which is a cer-
tified standard of known accuracy, to detect and
adjust any discrepancy in the accuracy of the in-
strument being compared.
g. Install. The act of emplacing, seating, or fix-
ing into position an item, part, or module (compo-
nent or assembly) in a manner to allow the proper
functioning of an equipment or system.
h. Replace. The act of substituting a ser-
viceable like type part, subassembly, or module
(component or assembly) for an unserviceable
i. Repair. The application of maitenance ser-
vices (inspect, test, service, adjust, align, calibrate,
or replace) or other maintenance actions (welding,
grinding, riveting, straightening, facing, remachin-
ing, or resurfacing) to restore serviceability to an
item by correcting specific damage, fault, malfunc-
tion, or failure in a part, subassembly, module
(component or assembly), end item, or system.
j. Overhaul That maintenance effort (ser-
vices/actions) 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 condi-
k. Rebuild. 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 materiel maintenance applied
to Army equipment. The rebuild operation in-
cludes the act of returning to zero those age
measurements (hours/miles, etc.) considered in
classifying Army equipments/components.
B-3. Column Entries Used in the MAC.
a. Column 1, Group Number. Column 1 lists
group numbers, the purpose of which is to identify