Definition
A guide—typically a ring, grommet, or slotted fitting made of plastic, phenolic, wood, or metal—through which a control cable passes to keep it aligned and prevent it from chafing against airframe structure or rubbing on adjacent components. A fairlead may deflect a cable no more than three degrees from a straight line.
Plain English
A small guide that a control cable runs through to hold it on a clean path and stop it from rubbing on the aircraft structure.
Context Anchor
Seen during aircraft maintenance and inspections of flight control cable routing inside the airframe.
Derivation
From the nautical term 'fairlead'—'fair' meaning smooth or unobstructed, and 'lead' meaning to guide. Originally used on ships to describe a fitting that guided a rope along a clean path. Aviation borrowed the word for the same job: leading a cable smoothly without snagging.
Why Pilots Care
Damaged or misaligned fairleads cause cable wear that can lead to stiff controls or sudden failure.
Intuition Check
Do not read “fairlead” as anything about fairness or an electrical lead. In aircraft maintenance, it means a physical guide for a cable or line.
Example Sentence 1
During the inspection, the technician found a fairlead that had worn through, allowing the aileron cable to rub against a bulkhead.
Example Sentence 2
During rigging, the cables were checked to ensure every fairlead was aligned and free of burrs.