TM 10-3930-659-20 APPENDIX B MAINTENANCE ALLOCATION CHART Section 1.  INTRODUCTION B-1. GENERAL. a. This  section  provides  a  general  explanation  of  all  maintenance  and  repair  functions  authorized  at  the various maintenance levels. b. The Maintenance Allocation Chart (MAC) in Section II designates overall authority and responsibility for the performance  of  maintenance  functions  on  the  identified  end  item  or  component.    The  application  of  the  maintenance functions  to  the  end  item  or  component  will  be  consistent  with  the  capacities  and  capabilities  of  the  designated maintenance levels. c. Section  III  lists  the  tools  and  test  equipment  (both  special  tools  and  common  tool  sets)  required  for  each maintenance function as referenced from Section II. d. Section IV contains supplemental Instructions and explanatory notes for a particular maintenance function. B-2. MAINTENANCE FUNCTIONS. Maintenance functions will be limited to and defined as follows: a. Inspect.  To determine the serviceability of an item by comparing its physical, mechanical, and/or electrical characteristics with established standards through examination (e.g., by sight, sound, or feel). b. Test.      To   verify   serviceability   by   measuring   the   mechanical,   pneumatic,   hydraulic,   or   electrical characteristics of an item and comparing those characteristics with prescribed standards. c. Service.    Operations  required  periodically  to  keep  an  item  in  proper  operating  condition,  i.e.,  to  clean (includes decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids, or gases. d. Adjust.    To  maintain  or  regulate,  within  prescribed  limits,  by  bringing  into  proper  or  exact  position,  or  by setting the operating characteristics to specified parameters. e. Aline.  To adjust specified variable elements of an item to bring about optimum or desired performance. f. Calibrate.    To  determine  and  cause  corrections  to  be  made  or  to  be  adjusted  on  instruments  or  test, measuring, and diagnostic equipments used in precision measurement.  Consists of comparisons 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 being compared. g. Remove/Install.      To   remove   and   install   the   same   item   when   required   to   perform   service   or   other maintenance functions.  Install may be the act of emplacing, seating, or fixing into position a spare, repair part, or module (component or assembly) in a manner to allow the proper functioning of an equipment or system. h. Replace.  To remove an unserviceable item and install a serviceable counterpart in its place.  "Replace" Is authorized by the MAC and is shown as the third position of the SMR code. B-1