d. Column (4), Maintenance Category. This
column is made up of sub-columns for each category of
maintenance. Work time figures are listed in these sub-
columns for the lowest level of maintenance authorized
to perform the function listed in column 3. These figures
indicate the average active time required to perform the
maintenance function at the indicated category of
maintenance under typical field operating conditions.
e. Column (5), Tools and Equipment. This column
is provided for referencing by code, the common tool
sets (not individual tools) special tools, test and support
equipment required to perform the designated function.
D-3. Explanation of Columns in Section III
a. Column (1), Reference Code. This column
consists of an arabic number listed in sequence from
Column 5 of Section II. The number references the
common tool sets, special tools and test equipment
b. Column (2), Maintenance Category. This
column shows the lowest category of maintenance
authorized to use the special tools or test equipment.
c. Column (3), Nomenclature. This column lists
the name or identification of the common tool sets,
special tools or test equipment.
d. Column (4), National/Nato Stock No. (NSN).
This column is provided for the NSN of common tool
sets, special tools and test equipment listed in the
e. Column (5), Tool Number. This column lists the
manufacturer's code and part number of tools and test