APPENDIX III
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
The Maintenance Operations are defined as follows:
1. General
a. Section I provides a general explanation of all
maintenance and repair functions authorized at various A---SERVICE: Operations required periodically to keep
the item in proper operating condition, i.e., to clean,
maintenance levels.
preserve, drain, paint, and replenish fuel, lubricants,
b. Section II designates overall responsibility for the hydraulic, and deicing fluids, or compressed air supplies.
performance of maintenance operations on the identified
end item or component. The implementation of the B---ADJUST:
Regulate
periodically
to
prevent
maintenance tasks upon the end item or component will malfunction. Adjustments will be made commensurate
be consistent with the assigned maintenance operations. with adjustment procedures and associated equipment
c. Section III lists the special tools and test specifications.
equipment required for each maintenance operation as
C---ALINE: Adjust two or more components of an
referenced from section II.
electrical or mechanical system so that their functions are
d. Section IV contains supplemental instructions, properly synchronized or adjusted.
explanatory notes and/or illustrations required for a
particular maintenance function.
D---CALIBRATE: Determine, check, or rectify the
graduation of an instrument, weapon, or weapons system
or components of a weapons system.
2. Explanation of Columns in Section II
a. Functional Group Number. The functional group
E---INSPECT: Verify serviceability and detect incipient
is a numerical group set up on a functional basis. The
electrical or mechanical failure by close visual
applicable functional grouping indexes (obtained from TB
examination.
750-93-1 Functional Grouping Codes) are listed on the
MAC in the appropriate numerical sequence. These
F---TEST: Verify serviceability and detect incipient
indexes normally are set up in accordance with their
electrical or mechanical failure by measuring the
function and proximity to each other.
mechanical or electrical characteristics of the item and
b. Component Assembly Nomenclature.
This comparing
those
characteristics
with
authorized
column contains a brief description of the components of standards. Tests will be made commensurate with test
each functional group.
procedures and with calibrated tools and/or test
equipment referenced in the MAC.
c. Maintenance Operations and Maintenance
Levels.
This column lists the various maintenance
G---REPLACE: Substitute serviceable components,
operations (A through J) and indicates the lowest
assemblies and subassemblies for unserviceable
maintenance level authorized to perform these
counterparts or remove and install the same item when
operations.
required for the performance of other maintenance
The symbol designation for the various maintenance operations.
levels are as follows:
H---REPAIR: Restore to a serviceable condition by
replacing unserviceable parts or by any other action
O/C-Operator or crew
required using available tools, equipment and skills-to
O -Organizational maintenance
include welding, grinding, riveting, straightening,
F -Direct support maintenance
adjusting, and facing.
H -General support maintenance
D-Depot maintenance
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