TM 3-1040-281-20&P
MAINTENANCE ALLOCATION CHART
Section
I.
INTRODUCTION
c. Service. Operations required periodically to
B-1. THE ARMY MAINTENANCE SYSTEM MAC.
keep an item in proper operating condition, i.e., to clean
a. This introduction (section 1) provides a general
(includes decontaminate, when required), to preserve,
explanation of all maintenance and repair functions
to drain, to paint, or to replenish fuel, lubricants, chemi-
authorized at various maintenance levels under the
cal fluids, or gases.
standard Army Maintenance System concept.
d. Adjust. To maintain or regulate, within pre-
b. The Maintenance Allocation Chart (MAC) in sec-
scribed limits, by bringing into proper or exact position,
tion II designates overall authority and responsibility for
or by setting the operating characteristics to specified
the performance of maintenance functions on the iden-
parameters.
tified end item or component. The application of the
.
maintenance functions to the end item or component
e. Aline. To adjust specified variable elements of
will be consistent with the capacities and capabilitiy of
an item to bring about optimum or desired perfor-
mance.
the designated maintenance Ievels, which are shown
f. Calibrate. To determine and cause corrections
on the MAC in column (4) as:
to be made or to be adjusted on instruments or test,
measuring and diagnostic equipments used in precision
UNIT, which includes two subcolumns, C (operator/
measurement. Consists of comparisons of two instru-
crew) and O (unit maintenance)
ments, one of which is a certified standard of known
accuracy, to detect and adjust any discrepancy in the
INTERMEDIATE, which includes two subcolumns,
F (Intermediate Direct Support)
accuracy of the instrument being compared.
g. Remove/Install. To remove and install the
and H (Intermediate General Sup-
same item when required to perform service or other
port)
maintenance functions. Install may bathe act of
emplacing, seating, or fixing into position a spare,
DEPOT, which includes a D (Depot) subcolumn
repair part, or module (component or assembly) in a
manner to allow the proper functioning of an equipment
c. Section III lists the tools and test equipment
or system.
(both special tools and common tool sets) required for
h. Replace. To remove an unserviceable item and
each maintenance function as referenced from sec-
tion Il.
install a serviceable counterpart in its place. "Replace"
d. Section IV contains supplemental instructions
is authorized by the MAC and is shown as the 3d posi-
tion code of the SMR code.
and explanatory notes for a particular maintenance
function.
i. Repair. The application of maintenance ser-
vices including fault location/ troubleshooting, removal/
installation, and disassembly/assembly procedures,
B-2. MAINTENANCE FUNCTIONS. Maintenance
and maintenance actions to identify troubles and
functions will be limited to and defined as follows:
restore serviceability to an item by correcting specific
a. Inspect. To determine the serviceability of an
item by comparing its physical, mechanical, and/or
damage, fault, malfunction, or failure in a part, sub-
electrical characteristics with established standards
assembly, module (component or assembly), end item,
through examination (e.g., by sight, sound, or feel).
or system.
b. Test. To verify serviceability by measuring the
mechanical, pneumatic, hydraulic or electrical chara~
teristics of an item and comparing those characteristics
with prescribed standards.