Appendix C. MAINTENANCE ALLOCATION CHART (MAC)

TM 9-8140-381-14&P

APPENDIX C

MAINTENANCE ALLOCATION CHART (MAC)

Section I. INTRODUCTION

C-1. GENERAL

to preserve, to drain, to paint, or to replenish fuel,

a. This section provides a general explanation of

lubricants, chemical fluids, or gases.

maintenance and repair functions authorized at various

maintenance categories.

d. Remove/Install. To remove and install the

same item when required to perform service or other

b. The Maintenance Allocation Chart (MAC) in

maintenance functions. Install may be the act of

section II designates overall authority and responsibility

emplacing, seating, or fixing into position a spare, repair

for the performance of maintenance functions on the

part, or component or assembly, in a manner to allow

identified end item or component. The application of

the proper functioning of the end item.

the maintenance functions to the end item or component

will be consistent with the capacities and capabilities of

e. Replace. To remove an unserviceable item

the designated maintenance categories.

and install a serviceable counterpart in its place.

c. Section III lists the tools and test equipment

f. Repair.

The application of' maintenance

required for each maintenance function as referenced in

services ,

including

troubleshooting ,

section II.

removal/installation,

and

disassembly/assembly

d. Section IV contains supplemental instructions

procedures, and maintenance actions to identify

and explanatory notes for a particular maintenance

troubles and restore serviceability to an item by

function.

correcting specific damage, fault, malfunction, or failure

in a part, subassembly, component, end item, or

system.

C-2. MAINTENANCE FUNCTIONS

Maintenance functions will be limited to and defined as

follows:

C-3. EXPLANATION OF COLUMNS IN MAC,

SECTION II

a. Inspect. To determine the serviceability of an

item by comparing its physical, mechanical, and/or

a. Column 1, Group Number. Column 1 lists

electrical characteristics with established standards

functional group code numbers, the purpose of which is

through examination.

to identify maintenance significant components,

assemblies, subassemblies, and modules with the next

b. Test. To verify serviceability by measuring,

higher assembly

pneumatic, hydraulic, or electrical characteristics of an

item and compiling those characteristics with prescribed

standards.

c. Service. Operations required periodically to

keep an item in proper operating condition, i.e., to clean,

Services - inspect, test, service, adjust, aline, calibrate, and/or replace.

Troubleshooting - the process of investigating and detecting the cause of equipment malfunctioning; the act of isolating

a fault within a system or unit under test.

Disassemble/assemble - encompasses the step-by-step taking apart (or breakdown) of a spare/functional group coded

item to the level of its least componency identified as maintenance significant (i.e., assigned as SMR code) for the level

of maintenance under consideration.

Actions - welding, grinding, riveting, straightening, facing, remachining, and/or resurfacing.

C-1