TM 55-4920-431-13
e. The assignment of a maintenance function will not be construed as authorization to
carry the associated repair parts in stock. Authority to requisition, stock or otherwise
secure necessary repair parts will be as specified in the repair parts and special tools list
appendix.
f. Normally there will be no deviation from the assigned level of maintenance. In
cases of operational necessity, maintenance functions assigned to a maintenance level may,
on a one-time basis and at the request of the lower maintenance level, be specifically
authorized by the maintenance officer of the level of maintenance to which the function is
assigned. The special tools, equipment, etc. required by the lower level of maintenance to
perform this function will be furnished by the maintenance level to which the function is
assigned. This transfer of a maintenance function to a lower maintenance level does not
relieve the higher maintenance level of the responsibility of the function. The higher level
of maintenance will provide technical supervision and inspection of the function being per-
formed at the lower level.
g. Organizational through depot maintenance of the U.S. Army Electronics Command
equipment will be performed by designated U. S. Army Electronics Command personnel.
h. Changes to the MAC will be based on continuing evaluation and analysis by
responsible technical personnel and on reports received from field activities.
A-3. Definitions.
a. Inspect. To determine serviceability of an item by comparing its physical, mech-
anical and electrical characteristics with established standards.
b. Test. To verify serviceability and detect incipient failure by measuring the mech-
anical or electrical characteristics of an item and comparing those characteristics with
prescribed standards.
c. Service. To clean, to preserve, to charge, and to add fuel, lubricants, cooling
agents and air.
d. Adjust. To rectify to the extent necessary to bring into proper operating range.
e. Aline. To adjust specified variable elements of an item to bring to optimum
performance.
f. Calibrate. To determine the corrections to be made in the readings of instruments
or test equipment used in precise measurement. Consists of the comparison of two instru-
ments, one of which is a certified standard of known accuracy, to detect and adjust any
discrepancy in the accuracy of the instrument or test equipment being compared with the
certified standard.
g. Install. To set up for use in an operational environment such as an em-
placement, site or vehicle.
h. Replace. To replace unserviceable items with serviceable assemblies, subassem-
blies or parts.
i. Repair. To restore an item to serviceable condition through correction of a
specific failure or unserviceable condition. This includes, but is not limited to, inspection,
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