MAINTENANCE ALLOCATION CHART
Section I INTRODUCTION
e. Align. To adjust specified variable elements of
a. This section provides a general explanation of
all maintenance and repair functions authorized at
an item to bring about optimum or desired
various maintenance categories.
f. Calibrate. To determine and cause corrections to
b. The maintenance allocation chart (MAC) in
section II designates overall authority and
be made or to be adjusted on instruments or test,
responsibility for the performance of maintenance
measuring, and diagnostic equipments used in
functions on the identified end item or component.
precision measurement. Consists of comparisons of
The application of the maintenance functions to the
two instruments, one of which is a certified standard
of known accuracy, to detect and adjust any
end item or component will be consistent with the
discrepancy in the accuracy of the instrument being
capacities and capabilities of the designated
c. Section III lists the tools and test equipment
g. Remove/Install. To remove and install the same
(both special tools and common tool sets) required
item when required to perform service or other
for each maintenance function as referenced from
maintenance functions. Install may be the act of
emplacing, seating, or fixing into position a spare,
repair part, or module (component or assembly) in a
d. Section IV contains supplemental instructions
manner to allow the proper functioning of an
and explanatory notes for a particular maintenance
equipment or system.
h. Replace. To remove an unserviceable item and
B-2. Maintenance Functions. Maintenance
install a serviceable counterpart in its place. Replace
functions will be limited to and defined as follows:
is authorized by the MAC and is shown as the third
position code of the SMR code.
a. Inspect. To determine serviceability of an item
by comparing its physical, mechanical, and/or
i. Repair. The application of maintenance services,
electrical characteristics with established standards
including fault location/troubleshooting, removal/
through examination (e.g., by sight, sound, or feel).
installation, and disassembly/assembly procedures,
and maintenance actions to identify troubles and
b. Test. To verify serviceability by measuring the
restore serviceability to an item by correcting specific
mechanical pneumatic, hydraulic, or electrical
damage, fault, malfunction, or failure in a part,
characteristics of an item and comparing those
subassembly, module (component or assembly), end
characteristics with prescribed standards.
item, or system.
c. Service. Operations required periodically to keep
an item in proper operating condition, i.e., to clean
(includes decontaminate, when required), to preserve,
to drain, to paint, or to replenish fuel, lubricants,
chemical fluids. or gases.
d. Adjust. To maintain or regulate, within
prescribed limits. by bringing into proper or exact
position, or by setting the operating characteristics to