Definition
A synthetic plastic polymer used in aircraft for insulation, tubing, interior trim, wire coverings, and various non-structural components. It is lightweight, resistant to moisture and many chemicals, and can be manufactured in either rigid or flexible forms depending on the additives used.
Plain English
A common type of plastic used throughout aircraft for things like wire insulation, hoses, and interior parts. It is light, durable, and easy to shape.
Context Anchor
Seen in aircraft maintenance manuals, material descriptions, wiring discussions, and parts identification.
Derivation
From 'poly-' meaning 'many,' 'vinyl' (a chemical group), and 'chloride' (a compound containing chlorine). The name describes the chemistry: many vinyl-chloride molecules linked together to form the plastic.
Why Pilots Care
PVC components have temperature and chemical limits. Mechanics need to know what is and isn't PVC when choosing replacement parts, routing wiring near heat sources, or selecting cleaning agents that won't damage it.
Intuition Check
PVC is not the name of a specific aircraft part. It names the kind of plastic material the part or covering is made from.
Example Sentence 1
The technician replaced a cracked section of PVC tubing in the cabin drain line.
Example Sentence 2
PVC sheathing protects the bundle of wires running through the fuselage.