Appendix B. MAINTENANCE ALLOCATION CHART (MAC)

TM 55-4920-426-13&P

APPENDIX B

MAINTENANCE ALLOCATION CHART (MAC)

Section I. INTRODUCTION

B-1

GENERAL

This section provides a general explanation of all maintenance and repair functions authorized at

various maintenance levels,

The Maintenance Allocation Chart (MAC) in section II designates overall responsibility for the performance

of maintenance functions on the identified end item or component. The implementation of the

maintenance functions upon the end item or component will be consistent with the assigned maintenance

functions.

Section Ill lists the special tools and test equipment required for each maintenance function as

referenced from section Il.

Section IV contains supplemental instructions and explanatory notes for a particular maintenance

function.

B-2

MAINTENANCE FUNCTIONS

Inspect. To determine the serviceability of an item by comparing its physical, mechanical and/or

electrical characteristics with established standards through examination.

Test. To verify serviceability and detect incipient failure by measuring the mechanical or electrical

characteristics of an item and comparing those characteristics with prescribed standards.

Service. Operations required periodically to keep an item in proper operating condition, i.e., to clean

(decontaminate), to preserve, to drain, to paint, or to replenish fuel, lubricants, hydraulic fluids, or com-

pressed air.

Adjust. To maintain, within prescribed limits, by bringing into proper or exact 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 or 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.

B-1