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Page Title:
Appendix C. MAINTENANCE ALLOCATION CHART |
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 TM 5-4120-274-15
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
The maintenance functions are defined as follows:
C-1. General
A--inspect: To determine serviceability of an
a. This section provides a general explanation
item by comparing its physical, mechanical,
of all maintenance and repair function author-
and electrical characteristics with estab-
ized at various maintenance levels.
lished standards.
b. Section II designates overall responsibility
B - Test: To verify serviceability and to detect
for the performance of maintenance functions on
electrical or mechanical failure by use of
the identified end item or component. The imple-
test equipment.
mentation of the maintenance functions upon the
C - Service: To clean, to preserve, to charge, to
end item or component will be consistent with the
paint, and to add fuel, lubricants, cooling
assigned maintenance functions.
agents, and air.
D - Adjust: To rectify to the extent necessary
c. Section III lists the special tools and test
to bring into proper operating range.
equipment required for each maintenance function
E - Aline: To adjust specified variable ele
as referenced from section II.
ments of an item to bring to optimum per-
d. Section IV contains supplemental instruc-
formance.
tions, explanatory notes and/or illuatrations re-
F - Calibrate: To determine the corrections to
quired for a particular maintenance function.
be made in the readings of instruments or
test equipment used in precise measure-
C-2. Explanation of Columns in Section II
ment. Consists of the comparisons of two
instruments, one of which is a certified
a. Group Number (1). The functional
standard of known accuracy, to detect and
group is a numerical group set up on a functional
adjust any discrepancy in the accuracy of
basis. The applicable functional grouping indexes
the instrument being compared with the
(obtained from TB 750-93-1, Functional Group-
certified standard.
ing Codes) are listed on the MAC (Maintenance
G - Install: To set up for use in an operational
Allocation Chart) in the appropriate numerical
environment such as an emplacement, site,
sequence. These indexes are normally set up in
or vehicle.
accordance with their function and proximity to
each.
H - Replace: To replace unserviceable items
with serviceable assemblies, subassemblies,
b Functional Group Column (2). This column
or parts.
contains a brief description of the components of
I - Repair: To restore an item to serviceable
each functional group.
condition. This includes, but is not limited
c. Maintenance Functions Column (3). This
to, inspection, cleaning, preserving, adjust-
column lists the various maintenance functions
ing, replacing, welding, riveting, and
(A through K) and indicaes the lowest mainte-
strengthening.
nance category authorized to perform these func-
J - Overhaul: To restore an item to a complete-
tions. The symbol designations for the various
ly serviceable condition as prescribed by
maintenance categories are as follows:
maintenance serviceability standards using
C - Operator or crew
the Inspect and Repair Only as Necessary
O - Organizational maintenance
(IROAN) technique.
F - Direct support maintenance
K - Rebuild: To restore an item a standard
H - General support maintenance
D - Depot maintenance
as nearly as possible to original or new con-
C-1
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