TM 5-4320-300-14
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 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 III lists the special tools and test equipment 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.
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 equipments 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.
Install. 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. The act of substituting a serviceable like type part, subassembly, or module (component or assembly)
for an unserviceable counterpart.
B-1
