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Page Title: B-2. USE OF THE MAINTENANCE ALLOCATION CHART
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TM 55-4920-412-13&P repairs,  adjusts,  calibrates,  and  aligns  system  modules/ components.          Module/component     disassembly     and repair  will  support  the  DX  program  and  will  normally  be limited  to  tasks  requiring  cleaning  and  the  replacement of    seals,    fittings    and    items    of    common    hardware. Unserviceable  reparable  modules/  components  and  end items  which  are  beyond  the  capability  of  AVIM  to  repair will  be  evacuated  to  Depot  Maintenance.    This  level  will perform special inspections which exceed AVUM capability.          Provides     quick     response     maintenance support,   on-the-job   training,   and   technical   assistance through  the  use  of  mobile  maintenance  contact  teams. Maintains authorized operational readiness float. Provides     collections     and     classification     services     for serviceable/ unserviceable material Operates a cannibalization  activity  in  accordance  with  AR  750-50. (The aircraft maintenance company within the maintenance   battalion   of   a   division   will   perform   AVIM functions  consistent  with  air  mobility  requirements  and conservation   of   personnel   and   equipment   resources. Additional    intermediate    maintenance    support    will    be provided by the supporting non-divisional AVIM unit). B-2.      USE   OF   THE   MAINTENANCE   ALLOCATION CHART. a. The  MAC  assigns  maintenance  functions  to  the lowest  level  of  maintenance  based  on  past  experience and the following consideration: (1) Skills available. (2) Time required. (3) Tools  and  test  equipment  required  and/or available. b. Only the lowest level of maintenance authorized to   perform   a   maintenance   function   is   indicated   If   the lowest  level  of  maintenance  cannot  perform  all  tasks  of any  single  maintenance  function  (e.g.,  test,  repair),  then the   higher   maintenance   level(s)   than   can   accomplish additional tasks will also be indicated. c. A maintenance function assigned to a maintenance  level  will  automatically  be  authorized  to  be performed at any higher maintenance level. d. A maintenance function that cannot be performed  at  the  assigned  level  of  maintenance  for  any reason may be evacuated to the next higher maintenance   organization.      Higher   maintenance   levels will perform the maintenance functions of lower maintenance   levels   when   required   or   directed   by   the appropriate commander. e The assignment of a maintenance function will not be construed as authorization to carry the associated repair  parts  in  stock.    Authority  to  requisition,  stock,  or otherwise    secure    necessary    repair    parts    will    be    as specified    in    the    repair    parts    and    special    tools    list appendix. f. Normally   there   will   be   no   deviation   from   the assigned  level  of  maintenance.    In  cases  of  operational necessity, maintenance functions assigned to a maintenance  level  may,  on  a  one-time  basis  and  at  the request  of  the  lower  maintenance  level,  be  specifically authorized   by   the   maintenance   officer   of   the   level   of maintenance   to   which   the   function   is   assigned.      The special tools, equipment, etc.  required by the lower level of maintenance to perform this function will be furnished by    the    maintenance    level    to    which    the    function    is assigned.    This  transfer  of  a  maintenance  function  to  a lower   maintenance   level   does   not   relieve   the   higher maintenance  level  of  the  responsibility  of  the  function. The  higher  level  of  maintenance  will  provide  technical supervision and inspection of the function being performed at the lower level. g. Organizational   through   depot   maintenance   of the  US  Army  Electronics  Command  equipment  will  be performed by designated US Army Electronics Command personnel. h. Changes to the MAC will be based on continuing evaluation and analysis by responsible technical personnel and on reports received from field activities. B-3.  DEFINITIONS. a. Inspect.    To  determine  serviceability  of  an  item by   comparing   its   physical,   mechanical   and   electrical characteristics with established standards. b. Test.  To verify serviceability and detect incipient failure     by     measuring     the     mechanical     or     electrical characteristics of an item and comparing those characteristics with prescribed standards. c. Service.    To  clean,  to  preserve,  to  charge,  and to add fuel, lubricants, cooling agents and air. d. Adjust.      To   rectify   to   the   extent   necessary   to bring into proper operating range. e. Align.    To  adjust  specified  variable  elements  of an item to bring to optimum performance. f. Calibrate.    To  determine  the  corrections  to  be made  in  the  readings  of  instruments  or  test  equipment used     in     precise     measurement.          Consists     of     the comparison    of    two    instruments,    one    of    which    is    a certified   standard   of   known   accuracy,   to   detect   and adjust any discrepancy B-2

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