MAINTENANCE ALLOCATION CHART
lowest maintenance level authorized to perform
a. Section I provides a general explanation of
The symbol designations for the various mainte-
all maintenance and repair functions authorized a t
nance levels are as follows..
various maintenance levels.
O/C --Operator or crew
b. Section II designates overall responsibility
for the performance of maintenance operations on
DS --Direct Support
the identified end item or component. The imple-
GS --General Support
mentation of the maintenance tasks upon the end
item or component will be consistent with the as-
T h e Maintenance Operations are defined as
signed maintenance operations.
c. Section III lists the special tools and test
A--SERVICE: Operations required periodi-
equipment required for each maintenance operation
cally to keep the item in proper operating
as referenced from Section II.
condition, i.e., to clean, preserve, drain,
d. Section IV contains supplemental instructions,
explanatory notes and/or illustrations required for
draulic, and deicing fluids, or compressed
a particular maintenance function.
B --ADJUST: Regulate periodically to pre-
2. Explanation of Columns in Section II
vent malfunction. Adjustments will be
a. Functional Group Number. The functional
made commensurate with adjustment pro-
group is a numerical group set up on a functional
cedures and associated equipment speci-
basis. The applicable functional grouping indexes
(obtained from TB 750-93-1 Functional Grouping
C--ALINE: Adjust two or more components of
Codes) are listed on the MAC in the appropriate
an electrical or mechanical system so that
numerical sequence. These indexes are normally set
their functions are properly synchronized
up in accordance with their function and proximity
to each other.
D-CALIBRATE: Determine, check, or rec-
b. Component Assembly Nomenclature. This
t i f y the graduation of an instrument,
column contains a brief description of the compo-
weapon, or weapons systems or compo-
nents of each functional group.
nents of a weapons system.
c. Essentiality. The essentiality column reflects
E--INSPECT: Verify serviceability and de-
whether or not an assembly, or repair part, is com-
t e c t incipient electrical or mechanical
bat essential to the tactical use of the end item. The
failure by close visual examination.
letter "E" in this column indicates an item is com-
F -- T E S T : Verify serviceability and detect
incipient electrical or mechanical failure by
d. Maintenance Operations and Maintenance
m e a s u r i n g the mechanical or electrical
Levels. This column lists the various maintenance
characteristics of the item and comparing
operations ("A" through "J") and indicates the