TM 55-1560-307-13&P (b)      Less   Than   Company   Size   Aviation Units.      Aviation   elements   organic   to   brigade,   group, battalion   headquarters,   and   detachment   size   units   are normally  small  and  have  less  than  ten  aircraft  assigned. Maintenance tasks performed by these units will be those which  can  be  accomplished  by  the  aircraft  crew  chief  or assigned  aircraft  repairman  and  will  normally  be  limited preventive    maintenance,    inspections,    servicing,    spot painting,  stop  drilling,  application  of  nonstress  patches, minor   adjustments,   module/component   fault   diagnosis, and replacement of selected modules/components. Repair   functions   will   normally   be   accomplished   by   the supporting AVIM unit. (2)      AVIM   provides   mobile,   responsive   "one- stop"    maintenance    support.        (Maintenance    functions which are not conducive to sustaining air mobility will be assigned  to  depot  maintenance).    AVIM  may  perform  all maintenance  functions  authorized  to  be  done  at  AVUM. Repair   of   equipment   for   return   to   user   will   emphasize support or operational readiness requirements. Authorized maintenance includes replacement and repair of   modules/components   and   end   items   which   can   be accomplished  efficiently  with  available  skills,  tools,  and equipment.    AVIM  established  the  Direct  Exchange  (DX) program  for  AVUM  units  by  repairing  selected  items  for return to stock when such repairs cannot be accomplished at     the     AVUM     level.          The     AVIM     level     inspects, troubleshoots,  performs  diagnostic  tests,  repairs,  adjust, calibrates and alines aircraft system modules/components.    AVIM  units  will  have  capability  to determine the serviceability of specified modules/components  removed  prior  to  the  expiration  of the time between overhaul (TBO) or finite life. 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.      Airframe   repair   and fabrication  of  parts  will  be  limited  to  those  maintenance tasks  which  can  be  performed  with  available  tools  and test equipment. Unserviceable repairable modules/components and end items which are beyond the capability  of  AVIM  to  repair  will  be  evacuated  to  Depot Maintenance.      AVIM   will   perform   aircraft   weight   and balance  inspections  and  other  special  inspections  which exceed    AVUM    capability.        Provides    quick    response maintenance  support,  including  aircraft  recovery  and  air evacuation,  on-the-job  training,  and  technical  assistance through  the  use  of  mobile  maintenance  contact  teams. Maintains  authorized  operational  readiness  float  aircraft. Provides collection 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 nondivisional AVIM unit.) B-2.      USE   OF   THE   MAINTENANCE   ALLOCATION CHART (SECTION II). a.        The    maintenance    allocation    chart    assigns maintenance functions to the lowest category of maintenance based on past experience and the following considerations: (1)  Skills available. (2)  Work time required. (3)    Tools  and  test  equipment  required  and/or available. b.        Only    the    lowest    category    of    maintenance authorized to perform a maintenance function is indicated.      If   the   lowest   maintenance   category   cannot perform all tasks of any single maintenance function (e.g., test repair), then the higher maintenance level(s) that can accomplish additional tasks will also be indicated. B-2