TM  10-8110-201-14&P APPENDIX B MAINTENANCE  ALLOCATION  CHART Section I. INTRODUCTION. B-1. General. a. This section provides a general explanation of all maintenance and repair functions authorized at various  maintenance  levels. b. The Maintenance Allocation Chart (MAC) in Section  II  designates  overall  responsibility  for  the performance of maintenance functions on the iden- tified  end  item  or  component.  The  implementation of the maintenance functions upon the end item or component will be consistent with the assigned maintenance  functions. c. Section  III  lists  the  special  tools  and  test equipment required for each maintenance function as referenced from section II (Not Applicable). d. Section IV contains supplemental instruc- tions  on  explanatory  notes  for  a  particular maintenance  function  (Not  Applicable). B-2. Maintenance Functions. a. Inspect. To determine the serviceability of an item  by  comparing  its  physical,  mechanical  and/or electrical characteristics with established stan- dards  through  examination. b. Test. To  verify  serviceability  and  detect  inci- pient failure by measuring the mechanical or elec- trical characteristics of an item and comparing those  characteristics  with  prescribed  standards. c. Service. Operations  required  periodically  to keep  an  item  in  proper  operating  condition,  i.e.,  to clean (decontaminate), to preserve, to drain, to paint,  or  to  replenish  fuel,  lubricants,  hydraulic fluids,  or  compressed  air  supplies. d.  Adjust.  To  maintain,  within  prescribed limits, by bringing into proper or exact position, or by   setting   the   operating   characteristics   to specified    parameters. e. Align. To adjust specified variable elements of  an  item  to  bring  about  optimum  or  desired  per- formance. f. Calibrate. To determine and cause correc- tions  to  be  made  or  to  be  adjusted  on  instruments or  test  measuring  and  diagnostic  equipments  used in  precision  measurement.  Consists  of  com- parisons of two instruments, one of which is a cer- tified  standard  of  known  accuracy,  to  detect  and adjust any discrepancy in the accuracy of the in- strument  being  compared. g. Install. The  act  of  emplacing,  seating,  or  fix- ing  into  position  an  item,  part,  or  module  (compo- nent or assembly) in a manner to allow the proper functioning of an equipment or system. h.  Replace.  The  act  of  substituting  a  ser- viceable  like  type  part,  subassembly,  or  module (component  or  assembly)  for  an  unserviceable counterpart. i. Repair. The  application  of  maitenance  ser- vices (inspect, test, service, adjust, align, calibrate, or  replace)  or  other  maintenance  actions  (welding, grinding,  riveting,  straightening,  facing,  remachin- ing, or resurfacing) to restore serviceability to an item by correcting specific damage, fault, malfunc- tion, or failure in a part, subassembly, module (component  or  assembly),  end  item,  or  system. j.  Overhaul  That  maintenance  effort  (ser- vices/actions) necessary to restore an item to a completely serviceable/operational condition as prescribed  by  maintenance  standards  (i.e., DMWR)  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  condi- tion. k. 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 in- cludes  the  act  of  returning  to  zero  those  age measurements (hours/miles, etc.) considered in classifying  Army  equipments/components. B-3. Column Entries Used in the MAC. a. Column 1, Group Number. Column 1 lists group numbers, the purpose of which is to identify B-1