TM 9-1345-203-12
NOTE
C.3.3 Column (3) - Maintenance Function. Column
(3) lists the functions to be performed on the item listed in
The following definitions are applicable to the
column (2). (For a detailed explanation of these functions
"repair" maintenance function:
refer to "Maintenance Functions" outlined above.)
Services - Inspect, test, service, adjust, align,
C.3.4 Column (4) - Maintenance Level. Column (4)
calibrate, and/or replace.
specifies each level of maintenance authorized to perform
Fault location/troubleshooting - The process of
each function listed in column (3), by indicating work time
investigating and detecting the cause of equip-
required (expressed as manhours in whole hours or deci-
ment malfunctioning; the act of isolating a fault
mals) in the appropriate subcolumn. This work time figure
within a system or Unit Under Test (UUT).
represents the active time required to perform that mainte-
nance function at the indicated level of maintenance. If the
Disassembly/assembly - The step-by-step
number or complexity of the tasks within the listed mainte-
breakdown (taking apart) of a spare/functional
nance function varies at different maintenance levels, appro-
group coded item to the level of its least com-
priate work time figures are to be shown for each level. The
ponent, that is assigned as SMR code for the
work time figure represents the average time required to
level of maintenance under consideration (i.e.,
restore an item (assembly, subassembly, component, module,
identified as maintenance significant).
end item, or system) to a serviceable condition under typical
field operating conditions. This time includes preparation
Actions - Welding, grinding, riveting, straight-
time (including any necessary disassembly/assembly time),
ening, facing, machining, and/or resurfacing.
troubleshooting/fault location time, and quality assurance
time in addition to the time required to perform the specific
C.2.10 Overhaul.
That maintenance effort (service/
tasks identified for the maintenance functions authorized in
action) prescribed to restore an item to a completely service-
the MAC. The symbol designations for the various mainte-
able/operational condition as required by maintenance stan-
nance levels are as follows:
dards in appropriate technical publications. Overhaul is
normally the highest degree of maintenance performed by
Field:
the Army. Overhaul does not normally return an item to like
C - Crew maintenance
new condition.
O - Service maintenance
F - Field maintenance
C.2.11 Rebuild. Consists of those services/actions neces-
Sustainment:
sary for the restoration of unserviceable equipment to a like
L - Specialized Repair Activity (SRA)
new condition in accordance with original manufacturing
H - Below depot maintenance
standards. Rebuild is the highest degree of materiel mainte-
D - Depot maintenance
nance applied to Army equipment. The rebuild operation
includes the act of returning to zero those age measurements
NOTE
(e.g., hours/miles) considered in classifying Army equip-
ment/components.
The "L" maintenance level is not included in
column (4) of the MAC. Functions to this level
EXPLANATION OF COLUMNS IN THE MAC.
C.3
of maintenance are identified by a work time
figure in the "H" column of column (4), and an
C.3.1 Column (1) - Group Number. Column (1) lists
associated reference code is used in column
Functional Group Code (FGC) numbers, the purpose of
(6), Remarks Code. This code is keyed to the
which is to identify maintenance significant components,
remarks and the SRA complete repair applica-
assemblies, subassemblies, and modules with the Next
tion is explained there.
Higher Assembly (NHA).
C.3.5 Column (5) - Tools and Equipment Reference
C.3.2 Column (2) - Component/Assembly. Column
Code. Column (5) specifies, by code, those common tool
(2) contains the item names of components, assemblies, sub-
sets (not individual tools), common Test, Measurement and
assemblies, and modules for which maintenance is autho-
Diagnostic Equipment (TMDE), and special tools, special
rized.
TMDE and special support equipment required to perform
the designated function. Codes are keyed to the entries in
the tools and test equipment table.
C-2
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