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TM 5-4120-287-15
APPENDIX C
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
C-1. General
a. This section provides a general explanation of all maintenance and repair functions authorized at various
maintenance levels.
b. 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, explanatory notes and/or illustrations required for a particular
maintenance function.
C-2. Explanation of Columns in Section II
a. Group Number, Column (1). The functional group is a numerical group set up on a functional basis. The applicable
functional grouping indexes (obtained from TB 750-93-1, Functional Grouping Codes) are listed on the MAC (Maintenance
Allocation Chart) in the appropriate numerical sequence. These indexes are normally set up in accordance with their
function and proximity to each other.
b. Functional Group, Column (2). This column contains a brief description of the components of each functional group.
c. Maintenance Functions, Column (3). This column lists the various maintenance functions (A through K) and indicates
the lowest maintenance category authorized to perform these functions. The symbol designations for the various
maintenance categories are as follows:
C
-
Operator or crew
O
-
Organizational maintenance
F
-
Direct support maintenance
H
-
General support maintenance
D
-
Depot maintenance
The maintenance functions are defined as follows:
A
-
Inspect. To determine serviceability of an item by comparing its physical, mechanical, and electrical characteristics
with established standards.
B
-
Test. To verify serviceability and to detect electrical or mechanical failure by use of test equipment
C
-
Service. To clean, to preserve, to charge, to paint, and to add fuel, lubricants, cooling agents, and air.
D
-
Adjust. To rectify to the extent necessary to bring into proper operating range.
E
-
Lain. To adjust specified variable elements of an item to bring to optimum performance.
F
-
Calibrate. To determine the corrections to be made in the readings of instruments or test equipment used in precise
measurement. Consists of the 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 with the certified
standard.
G -
Install. To set up for use in an operational environment such as an emplacement, site, or vehicle.
C-1
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