MAINTENANCE ALLOCATION CHART
d. Adjust. To maintain, within pre-
scribed limits, by bringing into proper
a. This section provides a general
or exact position, or by setting the
operating characteristics to specified
explanation of all maintenance and re-
pair functions authorized at various
e. Align. To adjust specified vari-
able elements of an item to bring about
b . The Maintenance Allocation Chart
(MAC) in section II designates overall
optimum or desired performance.
responsibility for the performance of
f. Calibrate. To determine and
maintenance functions on the identified
cause corrections to be made or to be
end item or component. The implementa-
adjusted on instruments or test, mea-
tion of the maintenance functions upon
suring, and diagnostic equipments used
the end item or component will be con-
in precision measurement. Consists of
sistent with the assigned maintenance
comparisons of two instruments, one of
which is a certified standard of known
c . Section III lists the special
accuracy, to detect and adjust any dis-
tools and test equipment required for
crepancy in the accuracy of the instru-
each maintenance function as referenced
ment being compared.
from section II.
g. Install. The act of emplacing,
d . Section IV contains supplemental
seating, or fixing into position an item,
instructions and explanatory notes for
part, or module (component or assembly)
a particular maintenance function.
in a manner to allow the proper func-
tioning of an equipment or system.
h . Replace. The act of substituting
a serviceable like type part, sub-
Maintenance functions will be limited to
assembly, or module (component or as-
and defined as follows:
sembly) for an unserviceable counterpart.
i. Repair. The application of mainte-
a. Inspect. To determine the service-
nance services (inspect, test, service,
ability of an item by comparing its phys-
adjust, align, calibrate, or replace) or
ical, mechanical, and/or electrical
other maintenance actions (welding,
characteristics with established stand-
grinding, riveting, straightening,
ards through examination.
facing, remachining, or resurfacing) to
b. Test. To verify serviceability by
restore serviceability to an item by
measuring the mechanical or electrical
correcting specific damage, fault, mal-
characteristics of an item and comparing
function, or failure in a part, sub-
assembly, module (component or assembly),
those characteristics with prescribed
end item, or system.
c. Service. Operations required
j. Overhaul. That maintenance effort
(service/action) necessary to restore an
periodically to keep an item in proper
operating condition, i.e., to clean
item to a completely serviceable/
operational condition as prescribed
(includes decontaminate, when required),
by maintenance standards in appropriate
to preserve, to drain, to paint, or to
technical publications (i.e., DMWR).
Overhaul is normally the highest degree
fluids, or gases.