MAINTENANCE FUNCTIONS - CONTINUED
Remove/Install. To remove and install the same item when required to perform service or other maintenance functions. Installation may be the act of emplacing or
seating a spare, repair part, or module (component or assembly) into position in a manner to allow the proper functioning of an equipment or system.
Replace. To remove an unserviceable item and install a serviceable counterpart in its place. Replacement is authorized by the MAC and the assigned maintenance
level is shown as the third position code of the Source, Maintenance, and Recoverability (SMR) code.
Repair. Repair is the application of maintenance services, including fault location/troubleshooting, removal/installation, disassembly/assembly procedures, and
maintenance actions to identify troubles and restore serviceability to an item by correcting specific damage, fault, malfunction, or failure in a part, subassembly, mod-
ule (component or assembly), end item, or system.
The following definitions are applicable to the "repair" maintenance function:
Services - Inspecting, testing, service, adjustment, alignment, calibration, and/or replacement.
Fault location/troubleshooting - 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).
Disassembly/assembly - The step-by-step breakdown (taking apart) of a spare/functional group coded item to the level of its least component,
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.
Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely serviceable/operational condition as required by maintenance stan-
dards in appropriate technical publications. 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 manufactur-
ing 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 (hours/miles, etc.) considered in classifying Army equipment/components.
EXPLANATION OF COLUMNS IN THE MAC, SECTION 1
Column (1) - Group Number. Column (1) lists Group 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 autho-
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.)