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
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.