Rebuild. Consists of those services/actions necessary for the restoration of unserviceable
equipment to a like new condition in accordance with original manufacturing standards. Rebuild
is the highest degree of materiel maintenance applied to Army equipment. The rebuild operation
includes the act of returning to zero those age measurements (e.g., hours/miles) considered in
classifying Army equipment/components.
Explanation of Columns in the MAC
Column (1) Group Number. Column (1) lists FGC numbers, the purpose of which is to identify
maintenance significant components, assemblies, subassemblies, and modules with the Next Higher
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:
C Operator or Crew maintenance
O Unit maintenance
F Direct Support maintenance
L Specialized Repair Activity
H General Support maintenance
D Depot maintenance
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
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 special support 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 alphabetical order,
which is keyed to the remarks table entries.