Appendix A: MAINTENANCE ALLOCATION CHART

TM 55-4920-373-14&P

APPENDIX A

MAINTENANCE ALLOCATION CHART

A-1. PURPOSE.

9. Overhaul. To restore an item to a com-

pletely serviceable condition as prescribed by .

maintenance serviceability standards prepared and

The purpose of the maintenance allocation chart is

published for the specific item to be overhauled.

to provide all activities with maintenance functions

to be performed at each level of maintenance.

10. Rebuild. To restore an item to a stand-

A-2. DEFINITIONS.

ard as nearly as possible to original or new condi-

tion in appearance, performance, and life

expectancy. This is accomplished through com-

a. Column 1, Group number. Column 1 lists

group numbers, the purpose of which is to identify

plete disassembly of the item, inspection of all

components, assemblies, subassemblies, and

parts or components, repair or replacement of

worn or unserviceable elements (items) using

modules with the next higher assembly.

original manufacturing tolerances and specifica-

tions, and subsequent reassembly of the item.

b. Column 2, Functional group. Column 2

lists the noun names of components, assemblies,

11. Symbols. The symbol, O, F, H, or D

subassemblies, and modules on which maintenance

is authorized'.

placed in the appropriate column indicates the level

responsible for performing that particular mainte -

nance function. The symbol "%%" which applies to

c. Column 3, Maintenance functions. Mainte-

organizational maintenance indicates that the par-

nance functions will be limited to and defined as

ticular maintenance function may be performed

follows:

provided it is specifically authorized by the direct

1. Inspect. To determine serviceability of

support maintenance officer. Use of the symbol

will apply only to replacement of major assemblies

an item by comparing its physical, mechanical,

and time-consuming operations which are within

and electrical characteristics with established

the capabilities of organization but over which con-

standards.

trol by the commodity commands is considered

essential. In no case will the direct support main-

2. Test, To verify serviceability and to

tenance officer require the accomplishment of a

detect electrical or mechanical failure by use of

"% %" maintenance function by an organization or

test equipment.

unit, and in no case will a "% %" function authorize

stockage of parts at organizational level.

3. Service. To clean, to preserve, to

charge, and to add fuel, lubricants, cooling agents,

d. Column 4, Tools and equipment. This

and air. If it is desired that elements, such as

column will be used to specify, by code, those

painting and lubricating, be defined separately,

tools and test equipment required to perform the

they may be so listed.

designated function.

4. Adjust. To rectify to the extent neces-

e. Column 5, Remarks. Self-explanatory.

sary to bring into proper operating range.

A-3. GENERAL.

5. Align. To adjust specified variable ele-

ments of an item to bring to optimum performance.

a. A maintenance function assigned to a main-

tenance level, which for any reason is beyond its

6. Install. To set up for use in an opera-

capability, becomes the responsibility of the next

tional environment such as an emplacement, site,

higher maintenance level.

or vehicle.

7. Replace. To replace unserviceable items

b. The authority to perform a maintenance

function does not constitute authority to requisition

with serviceable assemblies, subassemblies, or

or otherwise secure necessary repair parts as

parts.

specified in current supply directives.

8. Repair. To restore an item to service-

A-4. DEVIATIONS.

able condition. This includes, but is not limited

a. Normally, there will be no deviations from

to, inspection, cleaning, preserving, adjusting,

the assigned maintenance level. In cases of

replacing, welding, riveting, and strengthening.

A-1