MAINTENANCE ALLOCATION CHART
Section 1. INTRODUCTION
a. This section provides a general explanation
of all maintenance and repair functions author-
ized at various maintenance levels.
b. Section 11 designates overall responsibility
for the performance of maintenance functions on
the identified end item or component. The imple-
mentation of the maintenance functions upon the
end item or component will be consistent with the
assigned maintenance functions.
c. Section III lists the special tools and test
equipment required for each maintenance func-
tion as referenced from section II.
d. Section IV contains supplemental instruc-
tions, explanatory notes and/or illustrations re-
quired for a particular maintenance function.
C-2. Explanation of Columns in Section II
a. Group Number, Column (1). The functional
group is a numerical group set up on a functional
basis, The applicable functional grouping indexes
(obtained from TB 75093--1, Functional Group-
ing Codes) are listed on the MAC (Maintenance
Allocation Chart) in the appropriate numerical
sequence. These indexes are normally set up in
accordance with their function and proximity to
b. Functional Group, Column (z). This column
contains a brief description of the components of
each functional group.
c. Maintenance Functions, Column (3), This
column lists the various maintenance functions
(A through K) and indicates the lowest mainte-
nance category authorized to perform these func-
tions, The symbol designations for the various
maintenance categories are as follows:
COperator or crew
FDirect support maintenance
H-General support maintenance
The maintenance functions are defined as fol-
AInspect. To determine serviceability of an item by
comparing its physical, mechanical, and electrical
characteristics with established standards.
BTest. To verify serviceability and to detect electrical
or mechanical failure by use of test equipment.
CService. To clean, to preserve, to charge, to paint,
and to add fuel, lubricants, cooling agents, and air.
DAdjust. To rectify to the extent necessary to bring
into proper operating range.
EAline. To adjust specified variable elements of an
item to bring to optimum performance.
FCalibrate. To determine the corrections to be made
in the readings of instruments or test equipment
used in precise measurements, Consists of the com-
parisons of two instruments, one of which is a
certified standard of known accuracy, to detect and
adjust any discrepancy in the accuracy of the in-
strument being compared with the certified standard.
GInstall. To set up for use in an operational environ-
ment such as an emplacement, site, or vehicle.
HReplace. To replace unserviceable items with serv-
iceable assemblies, subassemblies, or parts.
I Repair. To restore an item to serviceable condition.
This includes, but is not limited to, inspection, clean-
ing, preserving, adjusting, replacing, welding, rivet-
ing, and strengthening.
JOverhaul. To restore an item to a completely serv-
iceable condition as prescribed by maintenance
serviceability standards using the Inspect and Re-
pair Only as Necessary ( IROAN) technique.
KRebuild. To restore an item to a standard as nearly
as possible to original or new condition in appear-
ance, performance, and life expectancy, This is ac-
complished through complete disassembly of the
item, inspection of all parts or components, repair or
replacement of worn or unserviceable elements
(items), using original manufacturing tolerances
and specifications, and subsequent reassembly of the
d. Took and Equipment, Column (4). This col-
umn is provided for referencing by code the spe-
cial tools and test equipment (sec. 111) required
to perform the maintenance functions (sec. H).
e. Remarks, Column (5). This column is
vialed for referencing by code the remarks
IV) pertinent to the maintenance functions.
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