Use of the Maintenance Allocation Chart.

TM 55-4920-424-13&P

calibrates, and aligns system modules/components.

not be construed as authorization to carry the associated

Module/component disassembly and repair will support

repair parts in stock. Authority to requisition, stock, or

the DX program and will normally be limited to tasks

otherwise secure necessary repair parts will be as

requiring cleaning and the replacement of seals, fittings

specified in the repair parts and special tools list

and items of common hardware.

Unserviceable

appendix.

reparable modules/components and end items which are

beyond the capability of AVIM to repair will be evacuated

f. Normally there will be no deviation from the

to Depot Maintenance. This level will perform special

assigned level of maintenance. In cases of operational

inspections which exceed AVUM capability. Provides

necessity, maintenance functions assigned to a

quick response maintenance support, on-the-job-

maintenance level may, on a one-time basis and at the

training, and technical assistance through the use of

request of the lower maintenance level, be specifically

mobile maintenance contact teams.

Maintains

authorized by the maintenance officer to the level of

authorized operational readiness float.

Provides

maintenance to which the function is assigned. The

collections

and

classification

services

for

special tools, equipment, etc. required by the lower level

serviceable/unserviceable material.

Operates a

of maintenance to perform this function will be furnished

cannibalization activity in accordance with AR 750-50.

by the maintenance level to which the function is

(The aircraft maintenance company within the

assigned. This transfer of a maintenance function to a

maintenance battalion of a division will perform AVIM

lower maintenance level does not relieve the higher

functions consistent with air mobility requirements and

maintenance level of the responsibility of the function.

conservation of personnel and equipment resources.

The higher level of maintenance will provide technical

Additional intermediate maintenance support will be

supervision and inspection of the function being

provided by the supporting non-divisional AVIM unit.)

performed at the lower level.

g. Organizational through depot maintenance of

B-2. Use of the Maintenance Allocation Chart.

the US Army Electronics Command equipment will be

a. The MAC assigns maintenance functions to the

performed by designated US Army Electronics

lowest level of maintenance based on past experience

Command personnel.

and the following considerations:

h. Changes to the MAC will be based on continuing

(1) Skills available.

evaluation and analysis by responsible technical

(2) Time required.

personnel and on reports received from field activities.

(3) Tools and test equipment required and/or

available.

B-3. Definitions.

b. Only the lowest level of maintenance authorized

a. Inspect. To determine serviceability of an item

to perform a maintenance function is indicated. If the

by comparing its physical, mechanical and electrical

lowest level of maintenance cannot perform all tasks of

characteristics with established standards.

any single maintenance function (e.g., test, repair), then

b. Test.

To verify serviceability and detect

the higher maintenance level(s) that can accomplish

incipient failure by measuring the mechanical or

additional tasks will also be indicated.

electrical characteristics of an item and comparing those

characteristics with prescribed standards.

c. A maintenance function assigned to a

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

maintenance level will automatically be authorized to be

to add fuel, lubricants, cooling agents and air.

performed at any higher maintenance level.

d. Adjust. To rectify to the extent necessary to

d. A maintenance function that cannot be

bring into proper operating range.

performed at the assigned level of maintenance for any

e. Aline. To adjust specified variable elements of

reason may be evacuated to the next higher

an item to bring to optimum performance.

maintenance organization. Higher maintenance levels

f. Calibrate. To determine the corrections to be

will perform the maintenance functions of lower

made in the readings of instruments or test equipment

maintenance levels when required or directed by the

used in precise measurement.

Consists of the

appropriate commander.

comparison of two instruments, one of which is a

certified standard of known accuracy, to detect

e. The assignment of a maintenance function will

B-2