B-3. EXPLANATION OF COLUMNS IN SECTION III.
Column 4, Maintenance Category. This column is made up of subcolumns for each category of maintenance.
Work time figures are listed in these subcolumns 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.
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.
Column 1, Reference Code. This column consists of an arabic number listed in sequence from Column 5 or
Section II. The number references the common tool sets, special tools and test equipment requirements.
Column 2, Maintenance Category. This column shows the lowest category of maintenance authorized to use the
special tools or test equipment.
C = OPERATOR/CREW
O = UNIT
F = DIRECT SUPPORT
H = GENERAL SUPPORT
D = DEPOT
Column 3, Nomenclature. This column lists the name or identification of the common tool sets, special tools or
Column 4, National/NATO STOCK NUMBER (NSN). This column is provided for the NSN of common tool sets,
special tools and test equipment listed in the nomenclature column.
Column 5, Tool Number. This column lists the manufacturer's code and part number of tools and test