TM 10-1670-298-20&P
d. Column 4 - Maintenance Level. 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
L
Specialized Repair Activity (SRA)5
H
General Support Maintenance
D
Depot Maintenance
e. Column 5 - Tools and Test 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 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
equipment.
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.
B.5
EXPLANATION OF COLUMNS IN REMARKS, SECTION IV.
a. Column 1 - Reference Code. The code recorded in column 6, section II.
b. Column 2 - Remarks. This column lists information pertinent to the maintenance function being performed as
indicated in the MAC, section II.
5This 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 code is used in the Remarks column 6. This code is keyed to Section IV, Remarks, and the SRA complete
repair application is explained there.
B-3
