APPENDIX B. MAINTENANCE ALLOCATION CHART

APPENDIX B

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

Service. To clean, to preserve, to charge,

B-1. General

to paint, and to add fuel, lubricants,

a. This section provides a general explanation of

cooling agents, and air.

all maintenance and repair functions authorized at

Adjust. To rectify to the extent necessary

various maintenance levels.

to bring into proper operating range.

b. Section II designates overall responsibility for

Align. To adjust specified variable

the performance of maintenance functions on the

elements of an item to bring to optimum

i d e n t i f i e d end item or component. The im-

performance.

plementation of the maintenance functions upon

Calibrate. To determine the corrections

the end item or component will be consistent with

to be made in the readings of instruments

the assigned maintenance functions.

or test equipment used in precise

c. Section III lists the special tools and test

measurement. Consists of the com-

equipment required for each maintenance function

parisons of two instruments, one of

as referenced from Section II. (Not Applicable)

which is a certified standard of known

d. Section IV contains supplemental in-

accuracy, to detect and adjust any

structions, explanatory notes and / or illustrations

discrepancy in the accuracy of the in-

required for a particular maintenance function.

strument being compared with the

B-2. Explanation of Columns in Section II

certified standard.

a. Group Number, Column (l). The functional

Install. To set up for use in an

group is a numerical group set up on a functional

operational environment such as an

basis. The applicable functional grouping indexes

emplacement, site, or vehicle.

(obtained from TB 750-93-l, Functional Grouping

Replace. To replace unserviceable items

Codes ) are listed on the MAC in the appropriate

w i t h serviceable assemblies, sub-

numerical sequence. These indexes are normally set

assemblies, or parts.

up in accordance with their function and proximity

Repair. To restore an item to serviceable

to each other.

condition. This includes, but is not

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

limited to, inspection, cleaning,

contains a brief description of the components of

preserving, adjusting, replacing, welding,

each functional group.

riveting, and strengthening.

c. Maintenance Functions; Column (3). This

Overhaul. To restore an item to a

column lists the various maintenance functions (A

completely serviceable condition as

through K ) and indicates the lowest maintenance

prescribed by maintenance serviceability

category authorized to perform these functions.

standards using the Inspect and Repair

The symbol designations for various maintenance

Only as Necessary (IROAN) technique.

categories are as follows:

Rebuild. To restore an item to a standard

as nearly as possible to original or new

C -- Operator or crew

condition in appearance, performance,

O -- Organizational maintenance

F -- Direct support maintenance

and life expectancy. This is accomplished

H -- General support maintenance

through complete disassembly of the

D -- Depot maintenance

item, inspection of all parts of com-

The maintenance functions are defined as follows:

ponents, repair or replacement of worn

or unserviceable elements (items) using

Inspect. To determine serviceability of

original manufacturing tolerances and

an item by comparing its physical,

specifications, a n d subsequent re-

mechanical, and electrical characteristics

assembly of the item.

with established standards.

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

Test. To verify serviceability and to

column is provided for referencing bv code the

detect electrical or mechanical failure by

(sec. III)

use of test equipment.

special tools and test equipment,

B-1