MAINTENANCE ALLOCATION CHART (MAC) INTRODUCTION

TM 9-2320-361-24-2

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SUPPORTING INFORMATION

2-1/2 TON, 6X6, M44A2 SERIES TRUCKS (MULTIFUEL)

MAINTENANCE ALLOCATION CHART (MAC) INTRODUCTION

THE ARMY MAINTENANCE SYSTEM (AMS)

This Work Package (WP) provides a general explanation of all maintenance and repair functions

authorized at two maintenance levels under Two-Level Maintenance System concept.

The Maintenance Allocation Chart (MAC) (WP 0467 00) designates overall authority and responsibility

for the performance of maintenance functions on the identified end item or component. The application

of maintenance to the end item or component shall be consistent with the capacities and capabilities of

the designated maintenance levels, which are shown on the MAC in column (4) as:

Field Level (Tactical)C (operator/crew), O (unit) maintenance, and F (Direct Support). Field

Maintenance is on-system maintenance and is mainly replacement of defective parts and

preventative maintenance. Field maintenance returns repaired equipment to operation.

It covers crew, unit, and selected DS maintenance tasks. Some "off-system" maintenance can be

done at field level, if based on task analysis, it is simple to complete or it is critical to mission

readiness.

Sustainment Level (Sustainment)H (General Support) and D (Depot). Sustainment is off-

system maintenance and is mainly repair of defective or worn out equipment/parts. Sustainment

maintenance returns repaired equipment/parts to the supply system. It covers selected DS tasks,

GS and Depot maintenance.

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 remark (immediately following the tools and test equipment requirements) contains supplemental

instructions and explanatory notes for a particular maintenance function.

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