Appendix C. MAINTENANCE ALLOCATION CHART

APPENDIX C

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

C--Service: To clean, to preserve, to charge, to paint, and

C-1. General

to add fuel, lubricants, cooling agents, and air.

a. This section provides a general explanation

D--Adjust: To rectify to the extent necessary to bring

of all maintenance and repair functions autho-

into proper operating range.

rized at various maintenance levels.

E--Aline: To adjust specified variable elements of an

b. Section II designates overall responsibility

item to bring to optimum performance.

for the performance of maintenance functions on

F--Calibrate: To determine the corrections to be made in

the identified end item or component. The imple-

the readings of instruments or test equipment used

in precise measurement. Consists of the compari-

mentation of the maintenance functions upon the

sons of two instruments, one of which is a certified

end item or component will be consistent with the

standard of known accuracy, to detect and adjust

assigned maintenance functions.

any discrepancy in the accuracy of the instrument

c. Section III lists the special tools and test

being compared with the certified standard.

equipment required for each maintenance func-

G--Install: To set up for use in an operational environ-

ment such as an emplacement, site, or vehicle.

tion as referenced from section II.

H--Replace: To replace unserviceable items with servicea-

d. Section IV contains supplemental instruc-

ble assemblies, subassemblies, or parts.

tions, explanatory notes and/or illustrations re-

I--Repair: To restore an item to serviceable condition.

quired for a particular maintenance function.

This includes, but is not limited to, inspection,

cleaning, preserving, adjusting, replacing, welding,

C-2. Explanation of Columns in Section II

riveting, and strengthening.

J--Overhaul: To restore an item to a completely servicea-

a. Group Number, Column (1). The applicable

ble condition as prescribed by maintenance service-

assembly grouping indexes are listed on the MAC

ability standards using the Inspect and Repair

(maintenance allocation chart) in the appro-

Only as Necessary (IROAN) technique.

priate numerical sequence. These indexes are nor-

K--Rebuild: To restore an item to a standard as nearly

mally set up in accordance with their function

as possible to original or new condition in appear-

ance, performance, and life expectancy, This is ac-

and proximity to each other.

complished through complete disassembly of the

b. Functional Group, Column (2). This column

item, inspection of all parts or components, repair

contains a brief description of the components of

or replacement of worn or unserviceable elements

each assembly.

(items) using original manufacturing tolerances

c. Maintenance Functions, Column (3). This

and specifications, and subsequent reassembly of

column lists the various maintenance functions

the item.

(A through K) and indicates the lowest mainte-

d. Tools and Equipment, Column (4). This col-

nance category authorized to perform these func-

umn is provided for referencing by code the spe-

tions. The symbol designations for the various

cial tools and test equipment (sec. HI) required

maintenance categories are as follows:

to perform the maintenance functions (sec. II).

C--Operator or crew

e. Remarks, Column (5). This column is pro-

O--Organizational maintenance

vided for referencing by code the remarks (sec.

F--Direct support maintenance

IV) pertinent to the maintenance functions.

H--General support maintenance

D--Depot maintenance

C-3. Explanation of Columns in Section III

The maintenance functions are defined as follows:

a. Reference Code. This column consists of a

A--Inspect: To determine serviceability of an item by

number and a letter separated by a dash. The

comparing its physical, mechanical, and electrical

number references the T and TE requirements

characteristics with established standards.

column on the MAC. The letter represents the

B--Test: To verify serviceability and to detect electrical

specific maintenance function the item is to be

or mechanical failure by use of test equipment.

C-1