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 TM 55-1905-223-24-5
b. Column 2, Component/Assembly. Column 2 contains the noun 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 detailed explanation of these C functions, see paragraph B-2.)
d. Column 4, Maintenance Category. Column 4 specifies, by the listing of a work time figure in the
appropriate subcolumn(s), the category 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 category
of maintenance. If the number or complexity of the tasks within the listed maintenance function vary at
different maintenance categories, appropriate work time figures will be shown for each category. 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 categories are as follows:
UNIT
C-Operator or Crew
O-Organizational Maintenance
INTERMEDIATE
F-Direct Support Maintenance
H-General Support Maintenance
DEPOT
D-Depot
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, 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 Category. The lowest category 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 Stock Number. The National stock number of the tool or test equipment.
B-3
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