TM 10-4610-239-24
TM 08580B-24/3
APPENDIX B
MAINTENANCE ALLOCATION CHART (MAC)
Section I. INTRODUCTION
B-1. The Army Maintenance System MAC
a.
This introduction (Section I) provides a general explanation of all maintenance and repair functions
authorized at the two maintenance levels under the Two-Level Maintenance System concept.
b.
The MAC (immediately following, 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 shall be consistent with the capacities and
capabilities of the designated maintenance levels, which are shown on the MAC in column (4) as:
Field includes two sub columns, Unit (C (operator/crew) and O (unit)) and Direct Support (F)
maintenance.
Sustainment includes two sub columns, General Support (H) and Depot (D).
c.
Section III, Tools and Test Equipment, lists the tools and test equipment (both special tools and
common tool sets) required for each maintenance function as referenced from the MAC.
d.
Section IV, Remarks, contains supplemental instructions and explanatory notes for a particular
maintenance function.
B-2. Maintenance Functions
Maintenance functions are 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 on a
scheduled basis, i.e., load testing of lift devices and hydrostatic testing of pressure hoses.
c.
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. The following are examples of service functions:
(1) Unpack. To remove from packing box for service or when required for the performance of
maintenance operations.
(2) Repack. To return item to packing box after service and other maintenance operations.
(3) Clean. To rid the item of contamination.
(4) Touch up. To spot paint scratched or blistered surfaces.
(5) Mark. To restore obliterated identification.
