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 authority
and responsibility for the performance of maintenance functions on the identified end item
or component. The application of the maintenance functions to the end item or component
will be consistent with the capacities and capabilities of the designated maintenance
c. Section III lists the tools and test equipment (both special tools and common tool sets)
required for each maintenance function as referenced from Section II.
d. Section IV contains supplemental instructions and explanatory notes for a particular
B-2. MAINTENANCE FUNCTIONS
Maintenance functions will be limited to and defined as follows:
a. Inspect. To determine the serviceability of an item by comparing its physical, mecha-
nical, and/or electrical characteristics with established standards through examination (e.g.,
by sight, sound, or feel).
b. Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or
electrical characteristics of an item and comparing those characteristics with prescribed
c . S e r v i c e . Operations required periodically to keep an item in proper operating condi-
tion, 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 specified parameters.
e. Align. To adjust specified variable elements of an item to bring about optimum or de-
f. Calibrate. To determine and cause corrections
to be made or to be adjusted on instru-
ments or test, measuring, and diagnostic equipments
used in precision measurement. Consists
of comparisons of two instruments, one of which is
a certified standard of known accuracy,
to detect and adjust any discrepancy in the accuracy
of the instrument being compared.
g. Remove/Install. To remove and install the same item when required to perform ser-
vice or other 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 manner to allow