TM5-6115-584-12 NAVFAC  P-8-622-12 TO-35C2-3-456-1 TM-05682C-12 APPENDIX D MAINTENANCE  ALLOCATION  CHART Section I. INTRODUCTION D-1. GENERAL. a. This section provides a general explanation of all maintenance and repair functions authorized at various maintenance  levels. b.  Section  II  designates  overall  responsibility  for the  performance  of  maintenance  functions  on  the identified end item or component. The implementation of the maintenance functions upon the identified end item or component will be consistent with the assigned maintenance   functions. c.  Section  III  lists  the  tools  and  test  equipment required   for   each   maintenance   function   as   refer- enced from Section II. d. Section IV contains supplemental instructions or explanatory notes required for a particular mainten- ance   function. D-2. EXPLANATIONS OF COLUMS IN SECTION II. a. Group Number. Column 1. The assembly group number  is  a  numerical  group  assigned  to  each  assem- bly. The assembly groups are listed on the MAC in disassembly  sequence  beginning  with  the  first  assem- bly removed in a top down disassembly sequence. b. Assembly Group. Column 2. This column con- tains  a  brief  description  of  the  components  of  each assembly  group. c. Maintenance Functions. Column 3. This column lists the various maintenance functions (A through K). The   upper   case   letter   placed   in   the   appropriate column indicates the lowest maintenance level author- ized  to  perform  these  functions.  The  active  repair time required to perform the maintenance function is included  directly  below  the  symbol  identifying  the category of maintenance. The symbol designations for the various maintenance levels are as follows: The  maintenance  functions  are  defined  as  follows: 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  to  detect electrical or mechanical failure by use of test equip- ment. C - SERVICE. To clean, to preserve, to charge and to add fuel, lubricants, cooling agents and air. (If it is desired  that  elements,  such  as  painting  and  lubri- cating, be defined separately, they may be so listed.) 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 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 instru- ment  being  compared  with  the  certified  standard. G - INSTALL. To set-up for use in an operational environment  such  as  an  emplacement,  site  or  vehicle. H - REPLACE. To replace unserviceable items with serviceable like items. I  - REPAIR. Those maintenance operations neces- sary  to  restrore  an  item  to  serviceable  condition through correction of material damage or a specific failure. Repair may be accomplished at each level of maintenance. J   -   OVERHAUL.  Normally,  the  highest  degree  of maintenance  performed  by  the  Army  in  order  to minimize  time  work  is  in  process  consistent  with quality and economy of operation. It consists of that C - Operator or Crew O - F  - H - D - Organizational  Maintenance Direct  Support  Maintenance General Support Maintenance Depot  Maintenance maintenance  necessary  to  restore  an  item  to  com- pletely serviceable condition as prescribed by main- tenance standards in technical publications for each item of equipment. Overhaul normally does not return an item to like new, zero mileage or zero hour con- dition. K  -    REBUILD.  The  highest  degree  of  material maintenance.  It  consists  of  restoring  equipment  as nearly as possible to new condition in accordance with Change  2 D-1