TM 9-2330-285-14&P/TO 36A11-21-10-1
MAINTENANCE ALLOCATION CHART
S e c t i o n I INTRODUCTION
B-1. GENERAL
a. This section provides a general explanation of all maintenance and repair functions
authorized at various maintenance categories.
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 categories.
c. Section Ill lists the tools and test equipment (both special tools and common tool sets)
required for each maintenance function as referenced from section Il.
d. Section IV contains supplemental instructions and explanatory notes for a particular
maintenance function.
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, mechanical,
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
standards.
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 specified parameters.
e. Aline. To adjust specified variable elements of an item to bring about optimum or desired
performance.
f. Calibrate. To determine and cause corrections to be made or adjusted on instruments or
test, measuring, and diagnostic equipment 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 service 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 the proper
functioning of an equipment or system.