APPENDIX C. MAINTENANCE ALLOCATION CHART

APPENDIX C

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

The maintenance functions are defined as follows:

C-1. General

a. This section provides a general explanation of

A- Inspect: To determine serviceability of an item by

all maintenance and repair functions authorized at

comparing its physical, mechanical, and electrical

various maintenance levels.

characteristics with established standards.

B- Test: To verify serviceability and to detect electrical

b. Section II designates overall responsibility for

or mechanical failure by use of test equipment.

the performance of maintenance functions on the

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

identified end item or component. The implementation

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

of the maintenance functions upon the end item or

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

component will be consistent with the assigned

into proper operating range.

maintenance functions.

E- Aline: To adjust specified variable elements of an

item to bring to optimum performance.

c. Section III lists the special tools and test

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

equipment required for each maintenance function as

the readings of instruments or test equipment used in

referenced from section II.

precise measurement. Consists of the comparisons

of two instruments, one of which is certified standard

d. Section IV contains supplemental instructions,

of known accuracy, to detect and adjust any

explanatory notes and/or illustrations required for a

discrepancy in the accuracy of the instrument being

particular maintenance function.

compared with the certified standard.

G- Install:

To set up for use in an operational

C-2. Explanation of Columns in Section II

environment such as an emplacement, site or

vehicle.

a. Group Number, Column 1. The functional

H- Replace:

To replace unserviceable items with

group is a numerical group set up on a functional basis.

serviceable assemblies, subassemblies, or parts.

The applicable functional grouping indexes (obtained

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

from TB 750-93-1, Functional Grouping Codes) are

This includes, but is not limited to, inspection,

listed on the MAC (Maintenance Allocation Chart) in the

cleaning, preserving, adjusting, replacing, welding,

appropriate numerical sequence. These indexes are

riveting, and strengthening.

normally set up in accordance with their function and

J- Overhaul: To restore an item to a completely

proximity to each other.

serviceable condition as prescribed by maintenance

serviceability standards using the Inspect and Repair

b. Functional Group, Column 2. This column

Only as Necessary (IROAN) technique.

contains a brief description of the components of each

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

functional group.

as possible to original or new condition in

appearance, performance, and life expectancy. This

c. Maintenance Functions, Column S. This

is accomplished through complete disassembly of the

column lists the various maintenance functions (A

item, inspection of all parts or components, repair or

through K) and indicates the lowest maintenance

replacement of worm or unserviceable elements

category authorized to perform these functions. The

(items) using original manufacturing tolerances and

symbol designations for the various maintenance

specifications, and subsequent reassembly of the

categories are as follows:

item.

C-Operator or crew

d. Tools and Equipment, Column 4. This column is

O-Organizational maintenance

provided for referencing by code the

F-Direct support maintenance

H-General support maintenance

D-Depot maintenance

C-1