0063 00  TM 10-1670-287-23&P SUPPORTING INFORMATION  MC-4 RAM AIR FREE-FALL PERSONNEL PARACHUTE SYSTEM  MAINTENANCE ALLOCATION CHART (MAC)  THIS WORK PACKAGE COVERS: INTRODUCTION  The Army Maintenance System MAC  Maintenance Functions  Change 2  0063 00-1  • Introduction • Maintenance Functions • Explanation of Columns in the MAC  • Explanation of Columns in Tool and Test Equipment Requirements  • Explanation of Column in Remarks  1.  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.) This includes scheduled inspection and gagings and evaluation of cannon tubes.  2.  Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical  characteristics of an item and comparing those characteristics with prescribed standards on a  scheduled basis, i.e., load testing of lift devices and hydrostatic testing of pressure hoses.  3.  Service. Operations required periodically to keep an item in proper operating condition; e.g., to clean  (includes decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel,  lubricants, chemical fluids, or gases. This includes scheduled exercising and purging of recoil  mechanisms. The following are examples of service functions:  a.  Unpack. To remove from packing box for service or when required for the performance of  maintenance operations.  Maintenance functions are limited to and defined as follows:  The remarks (immediately following the tools and test equipment requirements) contain supplemental  instructions and explanatory notes for a particular maintenance function.  The tools and test equipment requirements (immediately following the MAC) list the tools and test  equipment (both special tools and common tool sets) required for each maintenance function as  referenced from the MAC.  Sustainment – includes two subcolumns, General Support (H) and Depot (D).  Field – includes two columns, Unit maintenance and Direct Support maintenance. The Unit  maintenance column is divided again into two more subcolumns, C for Operator or Crew and O for  Unit maintenance.  The MAC (immediately following the introduction) 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 shall be consistent with the capacities and  capabilities of the designated maintenance levels, which are shown in the MAC in column (4) as:  This section provides a general explanation of all maintenance and repair functions authorized at the two  maintenance levels under the Two-Level Maintenance System concept. 