TM 10-4510-207-14
B-3. EXPLANATION OF COLUMNS IN THE MAC, SECTION II.
Column (1) Group Number. Column (1) lists Functional Group Code (FGC) numbers, the purpose of which is to
identify maintenance significant components, assemblies, subassemblies, and modules with the Next Higher
Assembly (NHA).
Column (2) Component/Assembly. Column (2) contains the item names of components, assemblies, subassemblies,
and modules for which maintenance is authorized.
Column (3) Maintenance Function. Column (3) lists the functions to be performed on the item listed in column (2).
(For a detailed explanation of these functions refer to "Maintenance Functions" outlined above).
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 manhours in whole hours or decimals) in the
appropriate subcolumn. 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 varies 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 MAC. The symbol designations for the various maintenance levels are as follows:
Field:
U
C
Operator or Crew maintenance
O
Unit maintenance
F
Direct Support maintenance
Sustainment:
U
L
Specialized Repair Activity
H
General Support maintenance
D
Depot maintenance
NOTE
The "L" maintenance level is not included in column (4) of the MAC. Functions to this level of
maintenance are identified by work time figure in the "H" column of column (4), and an associated
reference code is used in the REMARKS column (6). This code is keyed to the remarks and the SRA
complete repair application is explained there.
Column (5) Tools and Equipment Reference Code. Column (5) specifies, by code, those common tool sets (not
individual tools), common Test, Measurement and Diagnostic Equipment (TMDE), and special tools, special TMDE,
and support special equipment required to perform the designated function. Codes are keyed to the entries in the
tools and test equipment table.
Column (6) Remarks Code. When applicable, this column contains a letter code, in alphabetic order, which is keyed
to the remarks table entries.
Change 1 B-3
