Appendix B: MAINTENANCE ALLOCATION CHART

TM 55-1510-219-10

APPENDIX B

MAINTENANCE ALLOCATION CHART

(9) Repair.

restore an

item to

B-1. Purpose.

serviceable condition. This includes, but is not limited

The purpose of the maintenance allocation chart is

to, inspection, cleaning, preserving, adjusting,

to provide all activities with maintenance functions to be

replacing, welding, riveting, and strengthening.

performed at each level of maintenance.

(10) Overhaul.

To restore an item to a

completely serviceable condition as prescribed by

B-2. Definitions.

maintenance serviceability standards prepared and

published for the specific item to be overhauled.

a. Column 1, Group Number. Column 1 lists group

(11) Rebuild. To restore an item to a standard

numbers, the purpose of which is to identify

as nearly as possible to original or new condition in

components, assemblies, subassemblies, and modules

appearance, performance, and life expectancy. This is

with the next higher assembly.

accomplished through complete disassembly of the

b. Column 2, Functional Group. Column 2 lists the

item, inspection of all parts or components, repair or

noun

names

components,

assemblies,

replacement of worn or unserviceable elements (items)

subassemblies, and modules on which maintenance is

using

original

manufacturing

tolerances

and

authorized.

specifications, and subsequent reassembly of the item.

c. Column

Maintenance

Functions.

(12) Symbols. The symbol O, F, H, or D

Maintenance functions will be limited to and defined as

placed in the appropriate column indicates the level

follows:

responsible for performing that particular maintenance

(1) Inspect. To determine serviceability of an

function.

The symbol "%%" which applies to

item by comparing its physical, mechanical, and

organizational maintenance indicates the level

electrical characteristics with established standards.

responsible for performing that particular maintenance

(2) Test.

To verify serviceability and to

function may be performed provided it is specifically

detect electrical or mechanical failure by use of test

authorized by the direct support maintenance officer.

equipment.

Use of the symbol will apply only to replacement of

(3) Service. To clean, to preserve, to charge,

major assemblies and time-consuming operations which

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

are within the capabilities of organization, but over

is desired that elements, such as painting and

which control by the commodity commands is

lubricating, be defined separately, they may be so listed.

considered essential. In no case will the direct support

(4) Adjust. To rectify to the extent necessary

maintenance officer require the accomplishment of a

to bring into proper operating range.

"%%" maintenance function by an organization or unit,

(5) Align.

To adjust specified variable

and in no case will a "%%" function authorize stockage

elements of an item to bring to optimum performance.

of parts at organizational level.

(6) Calibrate. To determine the corrections

d. Column 4, Tools and Equipment. This column

to be made in the readings of instruments or test

will be used to specify, by code, those tools and test

equipment used in precise measurement. Consists of

equipment required to perform the designated function.

the comparison of two instruments, one of which is a

e. Column 5, Remarks. Self-explanatory.

certified standard of known accuracy, to detect and

adjust any discrepancy in the accuracy of the instrument

B-3. General.

being compared with the certified standard.

a. A maintenance function assigned to a

(7) Install. To set up for use in an operational

maintenance level, which for any reason is beyond its

environment such as an emplacement, site, or vehicle.

capability, becomes the responsibility of the next higher

(8) Replace. To replace unserviceable items

maintenance level.

with serviceable assemblies, subassemblies, or parts.

b. The authority to perform a maintenance function

does not constitute authority to requisition or otherwise

secure necessary repair parts specified in current supply

directives.

B-1