TM 10-6640-215-13 APPENDIX B MAINTENANCE ALLOCATION CHART SECTION I.  INTRODUCTION B-1.  GENERAL. a.   This   section   provides   a   general   explanation   of   all   maintenance   and   repair   function   authorized   at   various maintenance categories. b.   The   Maintenance   Allocation   Chart   (MAC)   in   Section   II   designates   overall   authority   and   responsibility   for 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 categories. 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 are 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  lean  (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 a optimum 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. B-1