Definition
The removal of an existing aircraft component and the installation of a new or overhauled component in its place, performed in accordance with the aircraft manufacturer's instructions and applicable FAA regulations. Parts replacement must use approved parts and, depending on the work, must be performed and documented by appropriately certificated personnel.
Plain English
Taking an old or worn part off the aircraft and putting an approved new or rebuilt one on, following the manufacturer's instructions and the rules about who is allowed to do the work and how it gets recorded.
Context Anchor
Seen during aircraft inspections, maintenance discussions, logbook entries, and decisions about whether an aircraft is still airworthy after a part is changed.
Why Pilots Care
Correct parts replacement keeps the aircraft airworthy; shortcuts or improper documentation can ground the plane or create safety risks.
Intuition Check
Do not read parts replacement as simply “putting in a new part.” In aircraft maintenance, it also means using the right part, having the work done by the right person, and recording it properly.
Example Sentence 1
After the magneto failed during the run-up, the mechanic completed the parts replacement and made a logbook entry before the aircraft returned to service.
Example Sentence 2
After parts replacement on the fuel pump, the pilot updated the aircraft maintenance records.