MAINTENANCE FUNCTIONS CONTINUED
The following definitions are applicable to the "repair" maintenance function:
Services. Inspect, test, service, adjust, align, calibrate, and/or replace.
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, that is assigned an
SMR code for the level of maintenance under consideration (i.e., identified as
Actions. Welding, grinding, riveting, straightening, facing, machining, and/or
11. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely serviceable/
operational condition as required by maintenance standards 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.
12. 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 MAC
1. 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).
2. Column (2) Component/Assembly. Column (2) contains the item names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
3. 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".)