Explanation of Columns in the MAC, Section II.

TM 10-3930-631-12

C....................... Operator or Crew

B-3. Explanation of Columns in the MAC, Section

O ...................... Organizational Maintenance

F ....................... Direct Support Maintenance

a. Column I, Group Number. Column 1 lists

H....................... General Support Maintenance

functional group code numbers, the purpose of which is

D....................... Depot Maintenance

to identify maintenance significant components,

e. Column 5, Tools and Equipment. Column 5

assemblies, subassemblies, and modules with the next

specifies, by code, those common tool sets (not

higher assembly. End item group number shall be "00. "

individual tools) and special tools, TMDE, and support

b. Column 2, Component/Assembly. Column 2

equipment required to perform the designated function.

contains the names of components, assemblies,

f. Column 6, Remarks. This column shall, when

subassemblies, and modules for which maintenance is

applicable, contain a letter code, in alphabetic order,

authorized.

which shall be keyed to the remarks contained in Section

c. Column 3, Maintenance Function. Column 3

IV.

lists the functions to be performed on the item listed in

B-4. Explanation of Columns in Tool and Test

Column 2.

(For a detailed explanation of these

Equipment Requirements, Section III

functions, see paragraph B-2. )

a. Column 1, Tool or Test Equipment Reference

Column 4, Maintenance Level.

..........................d.

Code. The tool and test equipment reference code

Column 4 specifies, by the listing of a work time figure in

correlates with a code used in the MAC, Section II,

the appropriate subcolumn(s), the level of maintenance

Column 5.

authorized to perform the function listed in Column 3.

b. Column 2, Maintenance Level. The lowest level

This figure represents the active time required to perform

of maintenance authorized to use the tool or test

that maintenance function at the indicated level of

equipment.

maintenance. If the number or complexity of the tasks

c. Column3,Nomenclature. Name or identification

within the listed maintenance function vary at different

maintenance levels, appropriate work time figures will be

of the tool or test equipment.

d. Column 4, National/NATO Stock Number. The

shown for each level. The work time figure represents

the average time required to restore an item (assembly,

National or NATO Stock Number of the tool or test

subassembly, component, module, end item, or system)

equipment.

to a serviceable condition under typical field operating

e. Column 5, Tool Number. The manufacturer's

conditions.

This time includes preparation time

part number.

(including any necessary disassembly/assembly time),

B-5. Explanation of Columns in Remarks, Section

troubleshooting/fault

location

time,

and

quality

assurance/quality control time in addition to the time

Column 1, Reference Code.

The code

required to perform the specific tasks identified for the

recorded in Column 6, Section II.

maintenance functions authorized in the Maintenance

Column 2, Remarks.

This column lists

Allocation Chart. The symbol designations for the

information pertinent to the maintenance function being

various

maintenance

levels

are

follows:

performed as indicated in the MAC, Section II.

Change 2 B-2