TM
5-3431-203-15
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
ized to perform these operations. The symbol
C-1. General
designations for the various maintenance lev-
a. Section I provides a general explanation
els are as fallows:
of all maintenance and repair functions au-
thorized at various maintenance levels.
C - Operator or crew
b. Section II designates overall responsi-
O - Organizational maintenance
bility for the performance of maintenance op-
F - Direct, support maintenance
erations on the identified end item or com-
H - General support maintenance
ponent. The implementation of the mainte-
D - Depot maintenance
nance tasks upon the end item or compo-
nent will be consistent with the assigned
The maintenance operations are defined as fol-
maintenance operations.
lows:
c. Section III lists the special tools and test
A - SERVICE: Operations required periodi-
equipment required for each maintenance op-
c a l l y to keep the item in
eration as referenced from Section II.
proper operating condition,
d. Section IV contains supplemental in-
i.e.,
to clean,
preserve,
structions, explanatory notes and/or illustra-
drain, paint, and replenish
tions required for a particular maintenance
fuel, lubricants, hydraulic,
function.
and deicing fluids, or com-
pressed air supplies.
C-2. Explanation of Columns in
Section II
B - ADJUST: Regulate periodically to pre-
a. Functional Group Number. The func-
vent malfunction.
Adjust-
ments will be made commen-
tional group is a numerical group set up on
surate with adjustment pro-
a functional basis. The applicable functional
cedures
and
grouping indexes (obtained from TB 750-93-
associated
equipment specifications.
1 Functional Grouping Codes) are listed on
the MAC (Maintenance Allocation Chart) in
C - ALINE: Adjust two or more components
the appropriate numerical sequence. These
of an electrical or mechanical
indexes are normally set up in accordance with
system so that their functions
their function and proximity to each other.
are properly synchronized or
b. Component Assembly Nomenclature.
adjusted.
This column contains a brief description of
D - CALIBRATE: Determine, check, or recti-
the components of each functional group.
fy the graduation of an
instrument, weapon, or
c. Maintenance Operations and
Mainte-
nance Levels. This column lists the
various
weapons system or com-
p o n e n t s of a weapons
maintenance operations (A through
J) and
system.
indicates the lowest maintenance level
author-