TM 3-4230-204-12&P
APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
to preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids,
B-1.
GENERAL
or gases.
a. This section provides a general explanation of all maintenance and
d. Adjust. To maintain or regulate, within prescribed limits, by bringing
repair functions authorized at various maintenance levels.
into proper or exact position, or by setting the operating characteristics to
specified parameters.
b. The Maintenance Allocation Chart (MAC) in section II designates
overall authority and responsibility for the performance of maintenance
e. Aline. To adjust specified variable elements of an item to bring
functions on the identified end item or component. The application of the
about optimum or desired performance.
maintenance functions to the end item or component will be consistent with
f. Calibrate. To determine and cause corrections to be made or to be
the capacities and capabilities of the designated maintenance levels.
adjusted on instruments or test, measuring and diagnostic equipments used
c. Section III lists the tools and test equipment (both special tools and
in precision measurement. Consists of comparisons of two instruments, one
common tool sets) required for each maintenance function as referenced
of which is a certified standard of known accuracy, to detect and adjust any
from section II.
discrepancy in the accuracy of the instrument being compared.
d. Section IV contains supplemental instructions and explanatory notes
g. Remove/Install. To remove and install the same item when required
for a particular maintenance function.
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
B-2.
MAINTENANCE FUNCTIONS.
Maintenance functions will be
equipment or system.
limited to and defined as follows:
h. Replace. To remove an unserviceable item and install a serviceable
counterpart in its place. "Replace" is authorized by the MAC and is shown
a. Inspect. To determine the serviceability of an item by comparing its
as the 3d position code of the SMR code.
physical, mechanical, and/or electrical characteristics with established
i. Repair. The application of maintenance services, including fault
standards through examination (e.g., by sight, sound, or feel).
location/ troubleshooting, removal/installation, and disassembly/ assembly
b. Test.
To verify serviceability by measuring the mechanical,
procedures, and maintenance actions to identify troubles and restore
pneumatic, hydraulic, or electrical characteristics of an item and comparing
serviceability to an item by correcting specific damage, fault, malfunction, or
those characteristics with prescribed standards.
failure in a part, subassembly, module (component or assembly), end item,
c. Service. Operations required periodically to keep an item in proper
or system.
operating condition, i.e., to clean (includes decontaminate, when required),
B-1
