TM 10-8415-210-13&PB-2. MAINTENANCE FUNCTIONS (CONT).f.Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or test, measuring,and diagnostic equipments used in precision measurement. Consists of comparisons of two instruments, one of which isa certified standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument beingcompared.g.Remove/Install. To remove and install the same item when required to perform service or other maintenancefunctions. Install may be the act of emplacing, seating, or fixing into position a spare, repair part, or module (componentor assembly) in a manner to allow the proper functioning of an equipment or system.h.Replace. To remove an unserviceable item and install a serviceable counterpart in its place. "Replace" isauthorized by the MAC and assigned maintenance level is shown as the 3d position code of the SMR code.i.Repair. The application of maintenance services including fault location/troubleshooting2, removal/installation,and disassembly/assembly' procedures, and maintenance actions4 to restore serviceability to an item by correctingspecific damage, fault, malfunction, or failure in a part, subassembly, module (component or assembly), end item, orsystem.j.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 (i.e., DMWR).Overhaul is normally the highest degree of maintenance performed by the Army. Overhaul does not normally return anitem to like new condition.k.Rebuild.Consists of those service/actions necessary for the restoration of unserviceable equipment to a like newcondition in accordance with original manufacturing standards. Rebuild is the highest degree of materiel maintenanceapplied to Army equipment. The rebuild operation includes the act of returning to zero those age measurements (e.g.hours, miles) considered in classifying Army equipments/components.B-3. EXPLANATION OF COLUMNS IN THE MAC, SECTION HI.a.Column1,GroupNumber. Column 1 lists functional group code numbers, the purpose of which is to identifymaintenance significant components, assemblies, subassemblies, and modules with the next higher assembly.b.Column2,Component/Assembly. Column 2 contains the item names of components, assemblies,subassemblies, and modules for which maintenance is authorized.c.Column3,MaintenanceFunctions. Column 3 lists the functions to be performed on the1Services Inspect, test, service, adjust, align, calibrate, and/or replace.2Fault 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).3Disassembly/assembly The step-by-step breakdown (taking apart) of a spare/functional group coded item to thelevel of its least component, that is assigned an SMR code for the level of maintenance under consideration (i.e.,identified as maintenance significant).4Actions Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.B-2
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