Explanation of Columns in the MAC,
Inspect, test, service, adjust, align, calibrate, and/or
The process of investigating and
detecting the cause of equipment malfunctioning; the act of
isolating a fault within a system or unit under test (UUT).
Disassemble/assemble-encompasses the step-by-step taking apart
(or breakdown) of a spare/functional group coded item to the level
of its least componency identified as maintenance significant
(i.e., assigned an SMR code) for the category of maintenance under
Actions. Welding, grinding, riveting, straightening, facing,
remachinery, and/or resurfacing.
Column (1), Group Number. Column 1 lists- Functional group
code numbers, the purpose of which is to identify
maintenance significant components, assemblies,
subassemblies, and modules with the next higher assembly.
End item group number shall be 00.
Column (2), Component/Assembly.
Column contains the names
of components, assemblies, sub-assemblies, and modules for
which maintenance is authorized.
Column (3), Maintenance Functions. Column 3 lists the
functions to be performed on the item listed in Column 2.
(For detailed explanation of these functions, see
Column (4), Maintenance Level. This column is made up of
sub- columns for each category of maintenance.
figures are listed in these subcolumns for the lowest
level of maintenance authorized to perform the function
listed in Column 3. These figures indicate the average
active time required to perform the maintenance function
at the indicated category of maintenance under typical
field operating conditions.
Operator or crew.
Direct Support Maintenance
General Support Maintenance