TM 5-4310-451-14
B-2.
MAINTENANCE FUNCTIONS (Con’t).
k.
Rebuild. Consists of those services/actions necessary for the restoration of unserviceable equipment to a like
new condition in accordance with original manufacturing standards. Rebuild is the highest degree of materiel maintenance
applied to Army equipment. The rebuild operation includes the act of returning to zero those age measurements
(hours/miles, etc.) considered in classifying Army equipment/components.
B-3.
EXPLANATION OF COLUMNS IN THE MAC, SECTION II.
a.
Column 1, Group Number. Column 1 lists functional group code numbers, the purpose of which is to identify
maintenance significant components, assemblies, subassemblies, and modules with the next higher assembly. End item
group number shall be "00."
b.
Column 2, Component/Assembly. Column 2 contains the names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
c.
Column 3, Maintenance Function. Column 3 lists the functions to be performed on the item listed in Column
2. (For a detailed explanation of these functions, refer to paragraph B-2.)
d.
Column 4, Maintenance Level. Column 4 specifies, by the listing of a work time figure in the appropriate
subcolumn(s), the level of maintenance authorized to perform the function listed in Column 3. This figure represents the
active time required to perform that maintenance function at the indicated level of maintenance. If the number or
complexity of the tasks within the listed maintenance function vary at different maintenance levels, appropriate work time
figures will be shown for each level. The work time figure represents the average time required to restore an item
(assembly, subassembly, component, module, end item, or system) to a serviceable condition under typical field operating
conditions.
This
time
includes
preparation
time
(including
any
necessary
disassembly/assembly
time),
troubleshooting/fault location time, and quality assurance/quality control time In addition to the time required to perform the
specific tasks identified for the maintenance functions authorized in the Maintenance Allocation Chart. The symbol
designations for the various maintenance levels are as follows:
C
......
Unit (Operator or Crew)
O
......
Unit (Organizational) Maintenance
F
......
Direct Support Maintenance
H
......
General Support Maintenance
D
......
Depot Maintenance
e.
Column 5, Tools and Equipment. Column 5 specifies, by code, those common tool sets (not individual
tools) and special tools, TMDE, and support equipment required to perform the designated function.
f.
Column 6, Remarks. This column shall, when applicable, contain a letter code, in alphabetic order, which
shall be keyed to the remarks contained in Section IV.
B-4.
EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT REQUIREMENTS, SECTION III.
a.
Column 1, Tool or Test Equipment Reference Code. The tool and test equipment reference code
correlates with a code used in the MAC, Section II, Column 5.
b.
Column 2, Maintenance Level. The lowest level of maintenance authorized to use the tool or test
equipment.
c.
Column 3, Nomenclature. Name or identification of the tool or test equipment.
d.
Column 4, National/NATO Stock Number. The National or NATO Stock Number of the tool or test
equipment.
e.
Column 5, Tool Number. The manufacturer’s part number.
B-2
