TM 10-4930-220-13&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 levels.
b. The Maintenance Allocation Chart (MAC) in Section II designates overall responsibility for performance of
maintenance functions on the identified end item or component. Implementation of maintenance functions
upon end item or component will be consistent with assigned maintenance functions.
C. Section III lists special tools and test equipment required for each maintenance function as referenced in
Section II.
d. Section IV contains supplemental instructions or explanatory notes for a particular maintenance function.
B-2. Maintenance Functions.
a.
b.
c.
d.
e.
f.
g.
Inspect. To determine serviceability of an item by comparing its physical, mechanical and/or electrical
characteristics with established standards through examination.
Test. To verify serviceability and detect incipient failure by measuring mechanical or electrical characteris-
tics of an item and comparing those characteristics with prescribed standards.
Service. Periodic operations required to keep an item in proper operating condition, i.e. to clean (decon-
taminate), to preserve, to drain, to paint, and to lubricate.
Adjust. To maintain, within prescribed limits, by bringing into proper or exact position, or by setting operat-
ing characteristics to specified parameters.
Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or test measur-
ing 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.
Install. The act of emplacing, seating, or fixing an item into position.
B–1
