ARMY TM 9-6675-349-12&P
MARINE CORPS TM 11039A-12&P
MAINTENANCE ALLOCATION CHART
SECTION I. INTRODUCTION
The Maintenance Allocation Chart (MAC) provides an explanation of all maintenance and repair functions
authorized at various maintenance levels under the Army maintenance system concept. The IPADS
maintenance concept will be somewhat different due to the fact that there is only operator level maintenance and
the depot level maintenance, which is L-3 Communications. The maintenance allocation chart in Appendix D
Section II lists the actions and estimated times to conduct the maintenance required.
The MAC 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 subcolumns (C (Operator/Crew) and O (Unit)) maintenance and Direct Support
Sustainment Includes two subcolumns, General Support (H) and Depot (D) maintenance.
The tools and test equipment requirements (Appendix E) 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 contain supplemental instructions and explanatory notes for a particular maintenance function.
D-3. Maintenance Functions.
Maintenance functions are limited to and defined as follows:
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.
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.
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.
Adjust. To maintain or regulate, within prescribed limits, by bringing into proper position, or by setting the
operating characteristics to specified parameters.
Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
Calibrate. To determine and cause corrections to be made or to be adjusted on instruments of test, measuring,
and diagnostic equipment 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.