TM 55-1680-317-23&P
d. A maintenance function that cannot be performed at the assigned level of maintenance for any reason may be
evacuated to the next higher maintenance levels, which will per- form the maintenance functions of lower
maintenance levels when required or directed by the appropriate commander.
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 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 assign- ed. The special tools, equipment, etc. required by the lower level of maintenance to per-
form 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 has the authority to determine:
(1) If the lower level is capable of performing the work.
(2) If the lower level will require assistance or technical supervision and on-site inspection.
(3) If the authorization will be granted
g. Organizational through depot maintenance of the U.S. Army Electronics Command equipment 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.
B-3. DEFINITIONS I
a. Inspect. To determine serviceability of an item by comparing its physical, mechanical and electrical
characteristics with established standards.
b. Test. To verify serviceability and detect incipient failure by measuring the mechanical 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 instruments, 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 emplacement, site or vehicle.
h. Replace. To replace unserviceable assemblies, subassemblies, or parts.
B-3
