item listed in Column 2. (For detailed explanation of these functions, see paragraph B-2.)
d. Column 4, Maintenance Level. Column 4 specifies each level of maintenance authorized to perform each function
listed in Column 3, by indicating work time required (expressed as man-hours in whole hours or decimals) in the
appropriate sub-column. This work-time 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 are to 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 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 maintenance
O ......Unit maintenance
F.......Direct support maintenance
L .......Specialized Repair Activity (SRA)5
H ......General support maintenance
D ......Depot maintenance
Column 5, Tools and Test Equipment Reference Code. Column 5 specifies, by code, those common tool sets
(not individual tools), common TMDE, and special tools, special TMDE, and special support equipment required to
perform the designated function. Codes are keyed to tools and test equipment in Section III.
Column 6, Remarks. When applicable, this column contains a letter code, in alphabetical order, which is keyed
to the remarks contained in Section IV.
B-4. EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT REQUIREMENTS, SECTION III.
Column 1, Reference Code. The tool and test equipment reference code corresponds with a code used in the
MAC, Section II, Column 5.
Column 2, Maintenance Level. The lowest level of maintenance authorized to use the tool or test equipment.
Column 3, Nomenclature. Name or identification of the tools 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, model number, or type number.
This maintenance level is not included in Section II, column (4) of the Maintenance Allocation Chart. Functions to
this level of maintenance are identified by a work-time figure in the "H" column of Section II, column (4), and an
associated reference cq'4sed in the Remarks column (6). This code is keyed to Section IV, Remarks, and the SRA
complete repair application is explained there.