TM 5-3810-231-12
APPENDIX III
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
maintenance operations
("A"
through
"J") and
1. General
indicates the lowest maintenance level authorized to
perform these operations.
a. Section I provides a general explanation of all
maintenance and repair functions authorized at various
The symbol designations for the various maintenance
maintenance levels.
levels are as follows:
b. Section II designates overall responsibility for
the performance of maintenance operations on the
O/C-Operator or crew
identified end item or component. The implementation
0 -Organizational maintenance
of the maintenance tasks upon the end item or
F -Direct support maintenance
component will be consistent with the assigned
H -General support maintenance
maintenance operations.
D -Depot maintenance
c. Section III lists the special tools and test
equipment required for each maintenance operation as
The Maintenance Operations are defined as follows:
referenced from Section II.
d. Section IV contains supplemental instructions,
A- SERVICE: Operations required periodically to keep
explanatory notes and/or illustrations required for a
the item in proper operating condition, i.e., to clean,
particular maintenance function.
preserve, drain, paint, and replenish fuel, lubricants,
hydraulic, and deicing fluids, or compressed air
supplies.
2. Explanation of Columns in Section II
B-ADJUST:
Regulate
periodically
to
prevent
malfunction.
Adjustments will be made
a. Functional Group Number.
The functional
commensurate with adjustment procedures, and
group is a numerical group set up on a functional basis.
associated equipment specifications.
The applicable functional grouping indexes (obtained
C-ALINE: Adjust two or more components of an
from TB 750-931 Functional Grouping Codes) are listed
electrical or mechanical system so that their
on the MAC in the appropriate numerical sequence.
functions are properly synchronized or adjusted.
These indexes are normally set up in accordance with
D-CALIBRATE: Determine, check, or rectify the
their function and proximity to each other.
graduation of an instrument, weapon, or weapons
b. Component Assembly Nomenclature.
This
system or components of a weapons system.
column contains a brief description of the components
E-INSPECT: Verify serviceability and detect incipient
of each functional group.
electrical or mechanical failure by close visual
c. Maintenance Operations and Maintenance
examination.
Levels. This column lists the various
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