TM 1-4920-446-13& P
c. Column 3, Maintenance Function. Column 3 lists 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. The work time
figure represents the average time required to restore and item (assembly, subassembly, component, or end item) to a
serviceable condition under typical field operating conditions.
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 alphabetical order, which
shall be keyed to the remarks contained in Section
Explanation of Columns in Tools and Test Equipment Requirements, Section III.
a. Column 1, Reference Code. The tool and test equipment reference code correlates with a code in the MAC,
Section II, Column 5.
b. Column 2, Maintenance Category. The lowest category of maintenance authorized to use the tool The "O"
code corresponds to Aviation Unit Maintenance (AVUM), and the "F" code corresponds to Aviation Intermediate Mainte-
c. Column 3, Nomenclature. Name or identification of the tool.
d. Column 4, National Stock Number. The National Stock Number of the tool.
Explanation of Columns in Remarks, Section IV.
a. Column 1, Reference Code. The code recorded in Column 6, Section II.
b. Column 2, Remarks. This column lists information pertinent to the maintenance function being performed as
indicated in the MAC, Section II.