APPENDIX C. MAINTENANCE ALLOCATION - TM-11-5841-268-250051

T.O. 12P4-2APX-142

NAVAIR 16-35C6280-1

TM 11-5841-268-25

APPENDIX C

(Army) MAINTENANCE ALLOCATION

grinding, riveting, straightening, and replacement of parts

C1. GENERAL.

other than the trial and error replacement of running spare

This appendix provides a summary of the maintenance oper-

type items such as fuses, lamps, or electron tubes.

ations covered in the equipment literature for Control,

j. Overhaul. Normally, the highest degree of mainte-

Transponder Set C-6280A(P)/APX. It authorizes categories

nance performed by the Army. It consists of that main-

of maintenance for specific maintenance functions on re-

tenance necessary to restore an item to completely service-

pairable items and components and the tools and equipment

able condition as prescribed by maintenance standards in

required to perform each function. This appendix may be

technical publications for each item of equipment. Overhaul

used as an aid in planning maintenance operations.

normally does not return an item to like new, zero mileage,

C2. MAINTENANCE FUNCTIONS.

or zero hour condition.

Maintenance functions will be limited to and defined as

k. Rebuild. The highest degree of materiel maintenance.

follows:

It consists of restoring equipment as nearly as possible to

new condition in accordance with original manufacturing

a. Inspect. To determine serviceability of an item by

standards. Rebuild is performed only when required by

comparing its physical, mechanical, and electrical character-

operational considerations or other paramount factors and

istics with established standards.

then only at the depot maintenance category. Rebuild re-

b. Test. To verify serviceability and to detect incipient

duces to zero the hours or miles the equipment, or compo-

electrical or mechanical failure by use of special equipment

nent thereof, has been in use.

such as gages, meters, etc. This is accomplished with exter-

l. Symbols. The uppercase letter placed in the appropri-

nal test equipment and does not include operation of the

ate column indicates the lowest level at which that particu-

equipment and operator type tests using internal meters or

lar maintenance function is to be performed.

indicating devices.

c. Service. To clean, to preserve, to charge, and to add

C3. EXPLANATION OF FORMAT.

fuel, lubricants, cooling agents, and air. If it is desired that

C-4. GROUP NUMBER, COLUMN 1. Column 1 lists group

elements, such as painting and lubricating, be defined sepa-

numbers, the purpose of which is to identify components,

rately, they may be so listed.

assemblies, subassemblies, and modules with the next higher

d. Adjust. To rectify to the extent necessary to bring

assembly.

into proper operating range.

C5. FUNCTIONAL GROUP, COLUMN 2. Column 2

e. Adjust. To adjust two or more components or assem-

lists the noun names of components, assemblies, subassem-

blies of an electrical or mechanical system so that their

blies, and modules on which maintenance is authorized.

functions are properly synchronized. This does not include

C6. MAINTENANCE FUNCTIONS, COLUMN 3. Column

setting the frequency control knob of radio receivers or

3 lists the maintenance category at which performance of

transmitters to the desired frequency.

the specific maintenance function is authorized. Authoriza-

tion to perform a function at any category also includes

f. Calibrate. To determine the corrections to be made in

authorization to perform that function at higher categories.

the readings of instruments or test equipment used in pre-

The codes used represent the various maintenance categories

cise measurement. Consists of the comparison of two instru-

as follows:

ments, one of which is a certified standard of known accu-

racy, to detect and adjust any discrepancy in the accuracy

Maintenance Category

Code

of the instrument being compared with the certified standard

Operator/Crew

g. Install. To set up for use in an operational environ-

Organizational Maintenance

ment such as an encampment, site, or vehicle.

Direct Support Maintenance

General Support Maintenance

h. Replace. To replace unserviceable items with service-

Depot Maintenance

able like items.

C7. TOOLS AND TEST EQUIPMENT, COLUMN 4. Col-

i. Repair. To restore an item to serviceable condition

umn 4 specifies, by code, those tools and test equipment

through correction of a specific failure or unserviceable con-

required to perform the designated function. The numbers

dition. This function includes but is not limited to welding,

C-1