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 E-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 varies 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:
C Operator or Crew
O Unit Maintenance
F Direct support Maintenance
H General Support Maintenance
D Depot Maintenance
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 alphabetic order, which shall
be keyed to the remarks contained in Section IV.
E-4. EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT 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
c. Column 3-Nomenclature. Name or identification of the tool or test equipment.
d. Column 4-National Stock Number. The National stock number of the tool or test equipment.
e. Column 5-Tool Number. The manufacturer's part number.