## SUPPORTING INFORMATION MC-4 RAM AIR FREE-FALL PERSONNEL PARACHUTE SYSTEM MAINTENANCE ALLOCATION CHART (MAC) 

## THIS WORK PACKAGE COVERS: 

• Introduction 

• Maintenance Functions 

• Explanation of Columns in the MAC 

• Explanation of Columns in Tool and Test Equipment Requirements 

• Explanation of Column in Remarks 

## INTRODUCTION 

## The Army Maintenance System MAC 

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. 

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: 

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. 

Sustainment – includes two subcolumns, General Support (H) and Depot (D). 

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. 

The remarks (immediately following the tools and test equipment requirements) contain supplemental instructions and explanatory notes for a particular maintenance function. 

## Maintenance Functions 

Maintenance functions are limited to and defined as follows: 

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. 

