Definition
Aircraft parts that are counterfeit, unapproved, or misrepresented as airworthy when they are not. A bogus part may be a fake imitation of a genuine part, a used or worn part sold as new, a part lacking the required FAA documentation and traceability, or a part that has not been manufactured or repaired under an approved process. Such parts do not meet the airworthiness standards required for installation on a certificated aircraft.
Plain English
A part that looks like a legitimate aircraft part but isn't — either because it's fake, undocumented, or sold under false pretenses. It may not be safe to use, and installing one can ground an aircraft.
Context Anchor
Seen in aircraft maintenance, parts purchasing, inspection records, and discussions about whether a part is legal and safe to install.
Derivation
The word 'bogus' originally referred to a machine used to produce counterfeit coins in 19th-century America. Over time it came to mean anything fake or fraudulent. Applied to aircraft parts, it carries that same sense of something passed off as genuine when it isn't.
Why Pilots Care
Using them risks sudden failures in flight, loss of airworthiness, and serious legal penalties for the operator and maintainer.
Intuition Check
Bogus does not just mean “bad quality” here. A part can look normal but still be bogus if its approval, identity, or records are false or missing.
Example Sentence 1
The mechanic refused to install the bearing because the seller could not produce documentation proving it wasn't a bogus part.
Example Sentence 2
During the preflight, the owner discovered that a previous repair had used bogus parts on the landing gear.