To determine and cause corrections to be made or to be adjusted on
instruments or test, measuring, and diagnostic equipment used in precision
Consists of comparisons of two instruments, one of which is a
certified standard of known accuracy, to detect and adjust any discrepancy in the
accuracy of the instrument being compared.
To remove and install the same item when required to perform
service or other maintenance functions.
Install may be the act of emplacing,
seating, or fixing into position a spare, repair part, or module (component or
assembly) in a manner to allow the proper functioning of an equipment or system.
To remove an unserviceable item and install a serviceable counterpart
in its place.
Replace is authorized by the MAC and assigned maintenance level is
shown as the 3d position code of the SMR code.
The application of maintenance services , including fault
location/troubleshooting , removal/installation, and disassembly/assembly
to identify troubles and restore
procedures, and maintenance actions
serviceability to an item by correcting specific damage, fault, malfunction, or
failure in a part, subassembly, module (component or assembly) , end item, or
That maintenance effort (service/action) prescribed to restore an
item to a completely serviceable/operational condition as required by maintenance
standards in appropriate technical publication (i.e., DMWR).
Overhaul is normally
the highest degree of maintenance performed by the Army.
Overhaul does not
normally return an item to like new condition.
Consists of those services/actions necessary for the restoration of
unserviceable equipment to a like new condition in accordance with original
Rebuild is the highest degree of materiel maintenance
applied to Army equipment.
The rebuild operation includes the act of returning to
zero those age measurement (e.g., hour/miles) considered in classifying Army
B.3 EXPLANATION OF COLUMNS IN THE MAC, SECTION II.
B.3.1 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.
B.3.2 Column 2, Component/Assembly.
Column 2 contains the item names of components,
assemblies, subassemblies, and modules for which maintenance is authorized.
B.3.3 Column 3, Maintenance Function.
Column 3 lists the functions to be performed on
the item listed in Column 2.
(For detailed explanation of these functions, see
B.3.4 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
This work-time figure represents the active time required to perform
that maintenance function at the indicated level of maintenance.
If the number or
Service8 - inspect, test, service, adjust, align, calibrate, and/or
Fault location/troubleshooting - The process of investigating and
equipment malfunctioning; the act of isolating a fault within a system or
detecting the cause of
unit under test (UUT).
Disassembly/assembly - The step-by-step breakdown (taking apart) of a spare/functional group
coded item to the level of its least component that is assigned an SMR code for the level of
maintenance under consideration (i.e., identified as maintenance significant).
Actions - welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.