TM 32-6625-022-24&P
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
h. Repair. The application of maintenance services or
B-1 GENERAL.
other maintenance actions to restore serviceability to an
a. This setion provides a general explanation of all
item by correcting specific damage, fault, malfunction, or
maintenance and repair functions authorized at the various
failure in a part, subassembly, module (component or
maintanance levels.
assembly), and item, or system.
b. The Maintenance Allocation Chart (MAC) in Section
i. Overhaul. That maintenance effort (services/actions)
II designates overall responsibility for the performance of
necessary to restore an item to a completely serviceable/
maintenance functions on the identified end item or com-
operational condition as prescribed by maintenance stan-
ponent. The implementation of the maintenance functions
dards; i.e., Depot Maintenance Work Requirement in appro-
upon the end item or component will be consistent with
priate technical publications. Overhaul is normally the
the assigned maintenance functions.
highest degree of maintenance performed by the Army.
c. Section III lists the special tools and test equipment
Overhaul does not normally return an item to like new
required for each maintenance function as referenced from
condition.
Section II.
j. Rebuild. Consists of those services/actions necessary
d. Section IV contains supplemental instructions and
for the restoration of unserviceable equipment to a like new
explanatory notes for a particular maintenance function.
condition in accordance with original manufacturing stan-
dards. Rebuild is the highest degree of materiel main-
tenance applied to Army equipment. The rebuild operation
a. lnspect. To determine the serviceaibilty of an item
includes the act of returning to zero those age measure-
by comparing its physical, mecganical, and/or electrical
ments (hours/miles, etc.) considered in classifying Army
characteristics with established standards through examina-
equipments/components.
tion.
b. Test. To verify serviceablility and detect incipient
B-3 EXPLANATION OF COLUMNS IN THE MAC,
failure by measuring the mechanical or electrical character-
SECTION II.
istics of an item and comparing those characteristics with
prescribed standards.
a. Column 1, Group Number. Column 1 lists group
c. Service. Operatiom required periodically to keep an
numbers, the purpose of which is to identify components,
item in proper operating condition; i.e., to clean (decon-
assemblies, subassemblies, and modules with the next
taminate), to preserve, to drain, to paint, or to replenish
higher assembly.
fuel, lubricants, hydraulic fluids, or compressed air supplies.
b. Column 2, Component/Assembly. Column 2 con-
d. Adjust. To maintain, within prescribed limits, by
tains the names of components, assemblies, subassemblies,
bringing into proper or exact position or by setting the
and modules for which maintenance is authorized.
operating charactersistics to specified parameters.
c. Column 3, Maintenance Function. Column 3 lists the
e. Calibrate. To determine and cause corrections to be
functions to be performed on the item listed in column 2.
made or to be adjusted on instruments or teat measuring
(For detailed explanation of these functions, see para. B-2.)
and diagnostic equipment used in precision measurement.
d. Column 4, Maintenance Level. Column 4 specifies,
Consists of comparisons of two instruments, one of which
by the listing of a "work time" figure in the appropriate
is a certified standard of known accuracy, to detect and
subcolumn(s), the lowest level of maintenance authorized
adjust any discrpancy in the accuracy of the instrument
to perform the function listed in column 3. This figure
being compared.
represents the active time required to perform the main-
f Install. The act of placing, seating, or fixing into
tenance function at the indicated level of maintenance. If
position an item, past, or module (component or assembly)
the number or complexity of the tasks within the listed
in a manner to allow the proper functioning of an equip
maintenance function vary at different maintenance levels,
ment or system.
appropriate "work time" figures will be shown for each
g. Replae. The act of substituting a serviceable like
level. The number of man-hours specified by the "work
time" figure represents the average time required to restore
type part, subassembly, or module for an unserviceable
counterpart.
an item (assembly, subassembly, component, module, end
