APPENDIX  B MAINTENANCE  ALLOCATION  CHART Section I. INTRODUCTION B-1.   General a.  Section  I  provides  a  general  explanation  of  all maintenance   and   repair   functions   authorized   at various   maintenance   levels. b. Section   II   designates   overall   responsibility   for the   perform   ante   of   maintenance   operations   on   the identified   end   item   or   component. The   im- plementation   of   the   maintenance   tasks   upon   the end   item   or   component   will   be   consistent   with   the assigned   maintenance   operations. c.  Section  111  lists  the  special  tools  and  test equipment    required for    each    maintenance operation   as   referenced   from   Section   II. d.   Section   IV   contains   supplemental   instructions, explanatory  notes  and  /  or  illustrations  required  for a   particular   maintenance   function. B-2.   Explanation   of   Columns   in   Section   II a.  Functional  Group  Number.  The   functional group  is   numerical   group   set   up   on   a   functional basis.   The   applicable   functional   grouping   indexes (obtained   from   TB   750-93-1   Functional   Grouping Codes   )   are   listed   on   the   MAC   in   the   appropriate numerical   sequence.   These   indexes   are   normally   set up  in  accordance  with  their  function  and  proximity to   each   other. b.   Component   Assembly   Nomenclature.   This column  contains  a  brief  description  of  the  com- ponents   of   each   functional   group. c. Maintenance   Operations   and   Maintenance Levels.  This  column  lists  the  various  maintenance operations   (’*A”   through   “K”)   and   indicates   the lowest   maintenance   level   authorized   to   perform these   operations.   The   symbol   designations   for   the various   maintenance   levels   are   as   follows: C-Operator   and   /   or   crew O-Organizational    maintenance F—Direct    support    maintenance    (DS) H-General   support   maintenance   (GS) D—Depot   maintenance The   Maintenance   Operations   are   defined   as follows : C-SERVICIE    Operations    requiring    periodically   to   keep the   item   in   proper   operating   condition,   i.e.,   to   clean, preserve,   drain,   paint,   and   replenish   fuel,   refrigerant lubricants.  hydraulic,  and  deicing  fluids,  or  compressed air   supplies. D—ADJUST:   Regulate   periodically   to   prevent   malfunc- tion.  Adjustments  will  be   made   commensurate   with adjustrment   procedures and  associated   equipment specification. E—ALINE:   Adjust   two   or   more   components   of   an   elec- trical   or   mechanical   system   so   that   their   functions   are properly    synchronized    or    adjusted, F—CALIBRATE: Determine, check. or rectify the graduation   of   an   instrument,   weapon.   or   weapons system  or  componentds  of  a  weapons  system. A—INDPECTION:   VerifY   serviceability   and   detect   incipient electrical   or mechanical   failure   by   close   visual examination. B-TEST: Verify    serviceability} and   detect   incipient electrical   or   mechanical   failure   by   measuring   the mechanical   or   electrical   characteristics   of   the   item   and comparing those characteristics with authorized standards.  Detect  leaks  in  the  refrigerant  system  with the  aid  of  a  leak  detector.  Tests  will   be   made   com- mensurate   with   test   procedures   and   with   calibrated tools   and   /(w   test   equipment   reference   in   the   MAC. H—REPLACE    :    Substitute    serviceable    components. assemblies   and   subassemblies   for   unserviceable   counter parts   or   remote   and   install   the   same   item   w h e n required  for  the  performance  of  other  maintenance operations, G—INSTALL:  To  set  up  for  use  in  an  operational  en- vironment   such   as   an   emplacement.   site.   or   vehicle. I—REPAIR   : Restore   to   a   serviceable   condition   by replacing   unserviceable   parts   or   by   any   other   action required   using   available   tools.   equipment   and    skills—to include    welding, grinding.    riveting,    straightening. adjusting   and   facing. J—OVERHAUL:    Restore    an    item    to    a    completed    ser- viceable   condition   as   prescribed   by   serviceability standards   developed   and   published   by   the   commodity cornmands)   employing   techniques   of   “’inspect   and Repair  Only  as  Necessary.”  (IROAN).  Maximum   use   of diagnostic   and   test   equipment   is    combined   w i th minimum   disassembly   during   overhaul.   “Overhaul” may   be   assigned   to   any   level   of   maintenance   except organizational.  provided  the  time,  tools.  equipment, repair   parts   authorization,   and   technical   skills   are available   at   that   level.   Normally,   overhaul   as   applied   to end   items.   is   limited   to   depot   maintenance   level. K—REBUlLD:   Restore   to   a   condition   comparable   to   new by   disassembling   to   determine   the   condition   of   each component    part    and    reassembling    using    serviceable, rebuilt.   or   new   assemblies,   subassemblies   and   parts. d.   Too/s   and   Equipment.   This   column   is provided   for   referencing   the   SPECIAL   TOOL AND    TEST    EQUIPMENT    REQUIREMENTS (sec.   111)   and   REMARKS   (sec.   IV)   that   may   be associated   with   maintenance   operation   (sec.   II). e.  Remarks.   This   column is   provided   for referencing  by  codes  the  remarks  (see  IV)  pertinent to   the   maintenance   functions. B-1