TM 32-5985-343-14&P
APPENDIX D
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
D-1 GENERAL.
b. Column 2, Component/Assembly. Column 2
contains the names of components, assemblies,
a. This section provides a general explanation of
subassemblies, and modules for which maintenance is
all maintenance and repair functions authorized at
authorized.
various maintenance levels.
c. Column 3, Maintenance Function. Column 3
b. The Maintenance Allocation Chart (MAC) in
lists the functions to be performed on the item listed in
Section II designates overall responsibility for the
column 2. (For detailed explanation of these functions,
performance of maintenance functions on the identified
see paragraph D-2.)
end item or component. The implementation of the
maintenance functions upon the end item or component
d. Column 4, Maintenance Level.
Column 4
will be consistent with the assigned maintenance
specifies, by the listing of a "work time" figure in the
functions.
appropriate subcolumn(s), the lowest level of
c. Section III lists the special tools and test
maintenance authorized to perform the function listed in
equipment required for each maintenance function as
column 3. This figure represents the active time
referenced from Section II.
required to perform the maintenance function at the
indicated level of maintenance. If the number or
d. Section IV contains supplemental instructions
complexity of the tasks within the listed maintenance
and explanatory notes for a particular maintenance
function vary at different maintenance levels,
function.
appropriate "work time" figures will be shown for each
level. The number of man-hours specified by the "work
D-2 MAINTENANCE FUNCTIONS.
time" figure represents the average time required to
a. Inspect. To determine the serviceability of an
restore an item (assembly, subassembly, component,
item by comparing its physical, mechanical and/or
module, end item, or system) to a serviceable condition
electrical characteristics with established standards
under typical field operating conditions. This time
through examination.
includes preparation time, troubleshooting time, and
b. Test.
To verify serviceability and detect
quality assurance/quality control time in addition to the
incipient failure by measuring the mechanical or
time required to perform the specific tasks identified for
electrical characteristics of an item and comparing those
the maintenance functions authorized in the MAC. The
characteristics with prescribed standards.
symbol designations for the various maintenance levels
c. Service. Operations required periodically to
are as follows:
keep an item in proper operating condition; i.e., to clean
O.........................................Organizational maintenance
(decontaminate), to preserve, to drain, to paint, or to
e. Column 5, Tools and Equipment. Column 5
replenish fuel, lubricants, hydraulic fluids, or
specifies, by code, those common tool sets (not
compressed air supplies.
individual tools) and special tools, Test, Measurement,
d. Install. The act of emplacing, seating, or fixing
and Diagnostic Equipment (TMDE), and support
into position an item, part, or module (component or
equipment required to perform the designated function.
assembly) in a manner to allow the proper functioning of
f. Column 6, Remarks. This column shall, when
an equipment or system.
applicable, contain a letter code, in alphabetical order,
e. Replace. The act of substituting a serviceable
which shall be keyed to the remarks contained in
like type part, subassembly, or module for an
Section IV.
unserviceable counterpart.
f. Repair.
The application of maintenance
D-4 EXPLANATION OF COLUMNS IN TOOL AND
services or other maintenance actions to restore
TEST EQUIPMENT REQUIREMENTS, SECTION III.
serviceability to an item by correcting specific damage,
a. Column 1, Reference Code. The tool and
fault, malfunction, or failure in a part, subassembly,
TMDE reference code correlates with a code used in the
module (component or assembly), and item, or system.
MAC, Section II, column 5.
b. Column 2, Maintenance Level. The lowest level
D-3 EXPLANATION OF COLUMNS IN THE MAC,
of maintenance authorized to use the tool or test
equipment.
a. Column 1, Group Number. Column 1 lists group
numbers, the purpose of which is to identify
components, assemblies, subassemblies, and modules
with the next higher assembly.
D-1
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