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TM 10-4930-238-12&P
Appendix B
MAINTENANCE ALLOCATION CHART
Section l. INTRODUCTION
B-1. INTRODUCTION.
a. This section provides a general explanation of all maintenance and repair functions authorized at the vari-
ous 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 components 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 II.
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.
b.
c.
d.
e.
f.
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).
Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteris-
tics of an item and comparing those characteristics with prescribed standards.
Service. Operations required periodically to keep an item in proper operating condition, i.e., to clean (in-
cludes decontamination, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants,
chemical fluids, or gases.
Adjust. To maintain or regulate, within prescribed limits, by bringing into proper or exact position, or by set-
ting the operating characteristics to specified parameters.
Aline. TO adjust specified variable elements of an item to bring about optimum Performance.
Calibrate. TO determine and cause corrections to be made or to be adjusted tO instruments or test, measur-
ing, and diagnostic equipment used in precision measurement. Consists of comparisons of two instru-
ments, one of which is a certified standard of known accuracy, to detect and adjust any discrepancy in the
accuracy of the instrument being compared.
B-1
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