h. Changes to the MAC will be based on continuing evaluation and analysis by responsible technical personnel and
on reports received from field activities.
To determine serviceability of an item by comparing its physical, mechanical and electrical
characteristics with established standards.
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 change, 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 items with serviceable assemblies, subassemblies or parts.
i. Repair. To restore an item to serviceable condition through correction of a specified failure or unserviceable
condition. This includes, but is not limited to, inspection, cleaning, preserving, adjusting, replacing, welding, riveting, and
j. Overhaul. To restore an item to a completely serviceable condition as prescribed by maintenance serviceability
standards prepared and published for the specific to be overhauled.
k. Rebuild. To restore an item to a standard as nearly as possible to the original or new condition in appearance,
performance, and life expectancy. This is accomplished through the maintenance technique of complete disassembly of
the item, inspection of all parts or components, repair or replacement of worn or unserviceable elements (items) using
original manufacturing tolerances and specifications, and subsequent reassembly of the item.
Change 1 B-4