Explanation of Columns in Tool and Test Eq uipment Requirements, Section III.

TM 55-1905-223-24-4

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 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.

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 Eq uipment 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.

Column 3, Nomenclature. Name or identification of the tool or test equipment.

Column 4, National Stock Number. The National stock number of the tool or test equipment.

B-3