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TM 5-4120-270-15
APPENDIX C
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
C-1.
General
a.
This section provides a general explanation
of all maintenance and repair functions authorized at
various maintenance levels.
b.
Section II designates overall responsibility
for the performance of maintenance functions on the
identified end item or component. The implementation of
the maintenance functions upon the end item or
component
will
be
consistent
with
the
assigned
maintenance functions.
c.
Section III not applicable.
d.
Section IV not applicable.
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 TM 750-93-1, Functional Grouping Codes) are
listed on the MAC in the appropriate numerical
sequence. These indexes are normally set up in
accordance with their function and proximity to each
other.
b. Functional Group, Column (2). 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 maintenance
category authorized to perform these functions. The
symbol
designations
for
the
various
maintenance
categories are as follows: C-Operator or crew
O......
Organizational maintenance
F ......
Direct support maintenance
H ......
General support maintenance
D ......
Depot maintenance
The maintenance functions are defined as follows:
A--Inspect: To determine serviceability of an item by
comparing its physical, mechanical, and electrical
characteristics with established standards.
B--Test: To verify serviceability and to detect electrical
or mechanical failure by use of test equipment.
C-Service: To clean, to preserve, to charge, to paint,
and to add fuel, lubricants, cooling agents, and air.
D--Adjust: To rectify to the extent necessary to bring into
proper operating range.
E--Aline: To adjust specified variable elements of an
item to bring to optimum performance.
F--Calibrate: To determine the corrections to be made in
the readings of instruments or test equipment used in
precise measurement. Consists of the comparisons
of two instruments, one of which is a certified
standard of known accuracy, to detect and adjust any
discrepancy in the accuracy of the instrument being
compared with the certified standard.
G--Install: To act up for use in an operational
environment such as an emplacement, site, or
vehicle.
H--Replace: To replace unserviceable items with
serviceable assemblies, subassemblies, or parts.
I--Repair: To restore an item to serviceable condition.
This includes, but is not limited to, inspection, cleaning,
preserving, adjusting, replacing, welding, riveting, and
strengthening.
J--Overhaul: To restore an item to a completely
serviceable condition as prescribed by maintenance
serviceability standards using the Inspect and Repair
Only as Necessary (IROAN) technique.
K--Rebuild: To restore an item to a standard as nearly
as
possible
to
original
or
new
condition
in
appearance, performance, and life expectancy. This
is accomplished through complete disassembly of the
item, inspection of all parts or components, repair or
replacement of worn or unserviceable elements
(items) using original man
C-1
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