TM 1-4220-250-12&P
c.
A maintenance function assigned to a maintenance category will automatically be authorized to be performed at
any higher maintenance category.
d.
A maintenance function that cannot be performed at the assigned category of maintenance for any reason may
be evacuated to the next higher maintenance category. Higher maintenance categories will perform the
maintenance functions of lower maintenance categories when required or directed by the commander that has
the authority to direct such tasking.
e.
The assignment of a maintenance function will not be construed as authorization to carry the related repair parts
or spares in stock. Information to requisition or otherwise secure the necessary repair parts will be as specified in
the associated RPSTL.
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 for the function. The higher level of maintenance will provide technical supervision and inspection
of the function being performed at the lower level.
g.
Changes to the Maintenance Allocation Chart will be based on continuing evaluation and analysis by responsible
technical personnel and on reports received from field activities.
B.3 MAINTENANCE FUNCTIONS .
Maintenance functions will be limited to and defined as follows:
a.
Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and/or electrical
characteristics with established standards through examination.
b.
Test To verify serviceability by measuring the mechanical or electrical characteristics of an item and compare
those characteristics with prescribed standards.
c.
Service. Operations required periodically to keep an item in proper operating condition, i.e., to clean (includes
decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants,
chemical fluids, or gases.
d.
Adjust. To maintain, within prescribed limits, by bringing into proper or exact position, or by setting the operating
characteristics to specified parameters.
e.
Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
f.
Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or test,
measuring, and diagnostic equipment used in precision measurement. Consists of comparisons 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 being compared.
g.
Install. The act of emplacing, seating, or fixing into position an item, part, or module (component or
assembly) in a manner to allow the proper functioning of an equipment or system.
h.
Replace. The act of substituting a serviceable like type part, subassembly, or module (component or
assembly) for an unserviceable counterpart.
B-3
