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TM 32-5410-221-14&P
APPENDIX D
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
D-1
GENERAL.
appropriate technical publications. Overhaul is normally
the highest degree of maintenance performed by the
Army. Overhaul does not normally return an item to like
a. This section provides a general explanation of
new condition.
all maintenance and repair functions authorized at
various maintenance levels.
D-3
EXPLANATION OF COLUMNS IN THE MAC,
b. The Maintenance Allocation Chart (MAC) in
SECTION II.
Section 11 designates overall responsibility for the
performance of maintenance functions on the identified
a. Column  1, Group Number.  Column  1 lists
end item or component.  The implementation of the
group numbers, the purpose of which is to identify
maintenance functions upon the end item or component
components, assemblies, subassemblies, and modules
will be consistent with the assigned maintenance
with the next higher assembly.
functions.
b. Column  2, Component/Assembly.  Column 2
c. Section III lists the special tools and test
contains  the  names  of  components,  assemblies,
equipment required for each maintenance function as
subassemblies, and modules for which maintenance is
referenced from Section II.
authorized.
d. Section IV contains supplemental instructions
c. Column 3, Maintenance Function.  Column 3
and explanatory notes for a particular maintenance
lists the functions to be performed on the item Listed in
function.
column 2. (For detailed explanation of these functions,
see para. D2.)
D-2
MAINTENANCE FUNCTIONS.
d. Column 4, Maintenance Level.
Column 4
specifies, by the listing of a "work time" figure in the
a. Inspect. To determine the serviceability of an
appropriate  subcolumn(s),  the  lowest  level  of
item by comparing its physical, mechanical and/or
maintenance authorized to perform the function listed in
electrical characteristics with established standards
column 3.  This figure represents the active time
through examination.
required to perform the maintenance function at the
b. Test. To verify serviceability and detect incipient
indicated level of maintenance.  If the number or
failure by measuring the mechanical or electrical
complexity of the tasks within the Listed maintenance
characteristics  of  an  item  and  comparing  those
function  vary  at  different  maintenance  levels,
characteristics with prescribed standards.
appropriate "work time" figures will be shown for each
c. Service.  Operations required periodically to
level. The number of man-hours specified by the "work
keep an item in proper operating condition; i.e., to clean
time" figure represents the average time required to
(decontaminate), to preserve, to drain, to paint, or to
restore an item (assembly, subassembly, component,
replenish  fuel,  lubricants,  hydraulic  fluids,  or
module, end item, or system) to a serviceable condition
compressed air supplies.
under typical field operating conditions.  This time
d. Install. The act of emplacing, seating, or fixing
includes preparation time, troubleshooting time, and
into position an item, part, or module (component or
quality assurance/quality control, time in addition to the
assembly) in a manner to allow the proper functioning of
time required to perform the specific tasks identified for
an equipment or system.
the maintenance functions authorized in the XMAC.
e. Replace. The act of substituting a serviceable
The symbol designations for the various maintenance
like  type  part,  subassembly,  or  module  for  an
levels are as follows:
unserviceable counterpart.
C ...................................................... Operator/Crew
O.................................. Organizational maintenance
f. Repair.
The  application  of  maintenance
F ................................... Direct support maintenance
services or other maintenance actions to restore
H ................................ General support maintenance
serviceability to an item by correcting specific damage,
D ................................................ Depot maintenance
fault, malfunction, or failure in a part, subassembly,
e. Column 5, Tools and Equipment.  Column 5
module (component or assembly), and item, or system.
specifies, by code, those common tool sets (not
g. Overhaul.
That
maintenance
effort
individual tools' and special tools, Test, Measurement,
(services/actions) necessary to restore an item to a
and Diagnostic Equip meat (TMDE), and support
completely  serviceable/  operational  condition  as
equipment required to perform the designated function.
prescribed by maintenance standards;
i.e., Depot
Maintenance Work Requirement in
D-1

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