TM 55-4920-383-13&P support, on-the-job-training, and    technical assistance   through   the   use   of   mobile   maintenance contact   teams. Maintenance   authorized   opera- tional   readiness   float.   Provides   collections   and classification services   for   serviceable/unser- viceable  material.  Operates  a  cannibalization  ac- tivity  in  accordance  with  AR  750-50.  (The  aircraft maintenance  company  within  the  maintenance  bat- talion  of  a  division  will  perform  AVIM  functions consistent  with  air  mobility  requirements  and  con- servation  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  ex- perience  and  the  following  considerations: (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  can- not  perform  all  tasks  of  any  single  maintenance function   (e.g.,   test, repair),   then   the   higher maintenance   level(s)   that   can   accomplish   addi- tional  tasks  will  also  be  indicated. C .  A   maintenance   function   assigned   to   a maintenance   level   will   automatically   be   authoriz- ed   to   be   performed   at   any   higher   maintenance level. d.  A  maintenance  function  that  cannot  be  per- formed   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   re- quisition,    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   opera- tional   necessity,   maintenance   functions   assigned to   a   maintenance   level   may,   on   a   one-time   basis rind  at  the  request  of  the  lower  maintenance  level, be   specifically   authorized   by   the   maintenance   of- B-2 Change  2 ficer  to  the  level  of  maintenance  to  which  the  func- tion  is  assigned.  The  special  tools,  equipment,  etc. required  by  the  lower  level  of  maintenance  to  per- form   this   function   will   be   furnished   by   the maintenance  level  to  which  the  function  is  assign- ed.   This   transfer   of   a   maintenance   function   to   a lower  maintenance  level  does  not  relieve  the  higher maintenance  level  of  the  responsibility  of  the  func- tion.   The   higher   level   of   maintenance   has   the authority  to  determine: (1)   If   the   lower   level   is   capable   of   performing the work. (2)  If  the  lower  level  will  require  assistance  or technical  supervision  and  on-site  inspection. (3)  If  the  authorization  will  be  granted. g. Organizational   through   depot   maintenance   of the   US   Army   Electronics   Command   equipment will   be   performed   by   designated   US   Army   Elec- tronics   Command   personnel. h. Changes  to  the  MAC  will  be  based  on  continu- ing   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   stan- dards. 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.  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.  Aline.  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  equip- ment  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  in  the  accuracy  of  the instrument   or   test   equipment   being   compared with  the  certified  standard. g.  lnstall.  To  set  up  for  use  in  an  operational  en- vironment  such  as  an  emplacement,  site  or  vehicle.