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TM10-4330-235-13&P
APPENDIX B
MAINTENANCE ALLOCATION CHART
Section 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 implementation of the
maintenance functions upon the end item or component will be consistent with the assigned maintenance functions.
c.
Section Ill lists the special tools and test equipment 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.
b. Test. To verify serviceability by measuring the mechanical 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, 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 to be 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 is the act of emplacing, seating, or fixing into position an item, part, or module
(component or assembly) in a manner to allow the proper functioning of an equipment or system.
h.
Replace. To remove an unserviceable item and install a serviceable counterpart in its place. “Replace”
is authorized by the MAC and is shown as the 3d position code of the SMR code.
B-1
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