B-1. INTRODUCTION (Cont.)
Maintenance Functions (Cont.)
Maintenance Functions are Limited to and Defined as Follows (Cont.):
Adjust. To maintain or regulate, within prescribed limits, by bringing into proper or exact position,
or by setting the operating characteristics to specified parameters.
Align. To adjust specified variable elements of an item to bring about optimum or desired
Calibrate. To determine and cause corrections to be made or to be adjusted on instruments of
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.
Remove/Install. To remove and install the same item when required to perform service or other
maintenance functions. Install may be the act of emplacing, seating, or fixing into position a
spare, repair part, or module (component or assembly) in a manner to allow the proper functioning
of an equipment or system.
Replace. To remove an unserviceable item and install a serviceable counterpart in its place.
"Replace" is authorized by the MAC and the assigned maintenance level is shown as the third
position code of the Source, Maintenance and Recoverability (SMR) code.
Repair. The application of maintenance services, including fault location/troubleshooting,
removal/installation, disassembly/assembly procedures, and maintenance actions to identify
troubles and restore serviceability to an item by correcting specific damage, fault, malfunction, or
failure in a part, subassembly, module (component or assembly), end item, or system.
The following definitions are applicable to the "repair" maintenance
Services--Inspect, test, service, adjust, align, calibrate, and/or
replace, and painting/spot painting.
Fault location/troubleshooting--The process of investigating and
detecting the cause of equipment malfunctioning; the act of
isolating a fault within a system or Unit Under Test (UUT.)
Disassembly/assembly--The step-by-step breakdown (taking
apart) of a spare/ functional group coded item to the level of its
least component, that is assigned a Source, Maintenance, and
Recoverability (SMR) code for the level of maintenance under
consideration (e.g., identified as maintenance significant.)
Actions--Welding, grinding, riveting, straightening, facing,
machining, and/or resurfacing.