MAINTENANCE FUNCTIONS.

TM 32-5410-221-14&P

APPENDIX D

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

D-1

GENERAL.

appropriate technical publications. Overhaul is normally

the highest degree of maintenance performed by the

Army. Overhaul does not normally return an item to like

a. This section provides a general explanation of

new condition.

all maintenance and repair functions authorized at

various maintenance levels.

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EXPLANATION OF COLUMNS IN THE MAC,

b. The Maintenance Allocation Chart (MAC) in

SECTION II.

Section 11 designates overall responsibility for the

performance of maintenance functions on the identified

a. Column 1, Group Number. Column 1 lists

end item or component. The implementation of the

group numbers, the purpose of which is to identify

maintenance functions upon the end item or component

components, assemblies, subassemblies, and modules

will be consistent with the assigned maintenance

with the next higher assembly.

functions.

b. Column 2, Component/Assembly. Column 2

c. Section III lists the special tools and test

contains the names of components, assemblies,

equipment required for each maintenance function as

subassemblies, and modules for which maintenance is

referenced from Section II.

authorized.

d. Section IV contains supplemental instructions

c. Column 3, Maintenance Function. Column 3

and explanatory notes for a particular maintenance

lists the functions to be performed on the item Listed in

function.

column 2. (For detailed explanation of these functions,

see para. D2.)

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MAINTENANCE FUNCTIONS.

d. Column 4, Maintenance Level.

Column 4

specifies, by the listing of a "work time" figure in the

a. Inspect. To determine the serviceability of an

appropriate subcolumn(s), the lowest level of

item by comparing its physical, mechanical and/or

maintenance authorized to perform the function listed in

electrical characteristics with established standards

column 3. This figure represents the active time

through examination.

required to perform the maintenance function at the

b. Test. To verify serviceability and detect incipient

indicated level of maintenance. If the number or

failure by measuring the mechanical or electrical

complexity of the tasks within the Listed maintenance

characteristics of an item and comparing those

function vary at different maintenance levels,

characteristics with prescribed standards.

appropriate "work time" figures will be shown for each

c. Service. Operations required periodically to

level. The number of man-hours specified by the "work

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

time" figure represents the average time required to

(decontaminate), to preserve, to drain, to paint, or to

restore an item (assembly, subassembly, component,

replenish fuel, lubricants, hydraulic fluids, or

module, end item, or system) to a serviceable condition

compressed air supplies.

under typical field operating conditions. This time

d. Install. The act of emplacing, seating, or fixing

includes preparation time, troubleshooting time, and

into position an item, part, or module (component or

quality assurance/quality control, time in addition to the

assembly) in a manner to allow the proper functioning of

time required to perform the specific tasks identified for

an equipment or system.

the maintenance functions authorized in the XMAC.

e. Replace. The act of substituting a serviceable

The symbol designations for the various maintenance

like type part, subassembly, or module for an

levels are as follows:

unserviceable counterpart.

C ...................................................... Operator/Crew

O.................................. Organizational maintenance

f. Repair.

The application of maintenance

F ................................... Direct support maintenance

services or other maintenance actions to restore

H ................................ General support maintenance

serviceability to an item by correcting specific damage,

D ................................................ Depot maintenance

fault, malfunction, or failure in a part, subassembly,

e. Column 5, Tools and Equipment. Column 5

module (component or assembly), and item, or system.

specifies, by code, those common tool sets (not

g. Overhaul.

That

maintenance

effort

individual tools' and special tools, Test, Measurement,

(services/actions) necessary to restore an item to a

and Diagnostic Equip meat (TMDE), and support

completely serviceable/ operational condition as

equipment required to perform the designated function.

prescribed by maintenance standards;

i.e., Depot

Maintenance Work Requirement in

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