Definition
A bonded joint between two structural components in which the adhesive carries flight loads between the parts. The bond must be strong enough that the joined pieces behave as a single load-bearing structure under operational stresses.
Plain English
A glued joint that is strong enough to be part of the aircraft's actual structure, holding parts together under flight loads rather than just keeping them in place.
Context Anchor
Seen in aircraft maintenance, composite repairs, bonded skin panels, and airframe repair instructions.
Derivation
From Latin 'structura' (a building, arrangement) and Old English 'bindan' (to tie or fasten). A 'structural' bond is one that does the work of holding the structure together — not merely a decorative or sealing bond.
Why Pilots Care
Failure of a structural bond can reduce airframe strength and lead to in-flight separation of components.
Intuition Check
Do not read “bond” here as just any attachment or light glue. A structural bond is a strength-carrying joint that is part of the aircraft’s load path.
Example Sentence 1
The technician inspected the structural bond between the honeycomb core and the outer skin for any signs of separation.
Example Sentence 2
Technicians applied heat and pressure to cure the new structural bond on the fuselage skin.