MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
Section I, provides a general explanation of all
maintenance and repair functions authorized at various
Section lI, designates overall responsibility for
the performance of maintenance operations on the
identified end item or component. The implementation
of the maintenance tasks upon the end item or
component will be consistent with the assigned
Section III, lists the special tools and test
equipment required for each maintenance operation as
referenced from section II.
Section IV, contains supplemental instructions,
explanatory notes and/or illustrations required for a
particular maintenance function.
C-2. Explanation of Columns in Section II
Functional Group Number. The functional
group is a numerical group set up on a functional basis.
The applicable functional grouping indexes obtained
from TB 750-981 (Functional Grouping Codes) are listed
on the MAC in the appropriate numerical sequence.
These indexes are normally set up in accordance with
their function and proximity to each other.
Component Assembly Nomenclature. This
column contains a brief description of the components
of each functional group.
Levels. This column lists the various maintenance
operations (A through J) and indicates the lowest
operations. The symbol designations for the various
maintenance levels are as follows:
Operator or crew
Direct support maintenance
General support maintenance
The maintenance operations are defined as follows:
A - Service: Operations required periodically follows:
A - Service: Operations required periodically to keep the
item in proper operating condition, i.e., to clean,
lubricants, hydraulic, and deicing fluids, or
compressed air supplies.
B - Adjust: Adjust two or more components of an
electrical or mechanical system so that their
functions are properly synchronized or adjusted.
C - Aline: To adjust specified variable elements of an
item to bring to optimum performance.
D - Calibrate Determine, check, or rectify the graduation
of an instrument, weapon, or weapons system or
components of a weapons system.
E - Inspect: Verify serviceability and detect incipient
electrical or mechanical failure by close visual
F - Test: Verify serviceability and detect incipient
electrical or mechanical failure by measuring the
mechanical or electrical characteristics of the item
authorized standards. Tests will be made
commensurate with test procedures and with
calibrated tools and/or test equipment referenced
in the MAC.
G - Replace: Substitute serviceable components,
assemblies and subassemblies for