d. Column 4, Maintenance Level. Column 4 specifies, by the listing of a work time figure in the appropriate
subcolumn(s), the level 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 level of maintenance. If the number or
complexity of the tasks within the listed maintenance function vary at different maintenance levels, appropriate work
time figures will be shown for each level. 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 levels are as follows:
C Operator or Crew
H General Support Maintenance
O Unit Maintenance
F Direct Support 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.
B-4. EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT
REQUIREMENTS, SECTION IV.
a. Column 1, Reference Code. The tool and test equipment reference code correlates with a code used in the
MAC, Section II or III, Column 5.
b. Column 2, Maintenance Level. The lowest category of maintenance authorized to use the tool or test
Column 3, Nomenclature. Name or identification of the tool or test equipment.
Column 4, National Stock Number. The national stock number of the tool or test equipment.
Column 5, Tool Number. The manufacturer's part number.
B-5. EXPLANATION OF COLUMNS IN REMARKS, SECTION V.
a. Column 1, Reference Code. An alphabetic code listed in the sixth column of the MAC and first column of
the Remarks section to identify remarks made to the MAC.
Column 2, Remarks. The complete text of the remarks made to the MAC.