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ARMY TM 9-2815-252-24 AIR FORCE TO 38G1-92-2 i. Repair.  The application of maintenance services1 including fault location/troubleshooting2, removal/ installation, and  disassembly/assembly3  procedures,  and  maintenance  actions4  to  identify  troubles  and  restore  serviceability  to  an item   by   correcting   specific   damage,   fault,   malfunction,   or   failure   in   a   part,   subassembly,   module   (component   or assembly), and item, or system. 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 in normally the highest degree of maintenance performed by the Army.  Overhaul does not normally return an item to like new condition. k. Rebuild.    Consists  of  those  service/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   material 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 and components. B-3 EXPLANATION OF COLUMNS IN THE MAC, SECTION II. a. 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. Column  2  Component/Assembly.    Column  2  contains  the  names  of  components,  assemblies,  subassemblies, and modules for which maintenance is authorized. c. 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 paragraph B-2.) 1Service—  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 the  level  of  its  least  component,  that  is  assigned  as  SMR  code  for  the  level  of  maintenance  under  consideration  (i.e., identification as maintenance significant). 4Actions—   Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing. B-2


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